--- /dev/null
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include <linux/vgaarb.h>
+
+#include "i915_drv.h"
+#include "i915_irq.h"
+#include "intel_cdclk.h"
+#include "intel_combo_phy.h"
+#include "intel_crt.h"
+#include "intel_csr.h"
+#include "intel_dp.h"
+#include "intel_dpio_phy.h"
+#include "intel_drv.h"
+#include "intel_hotplug.h"
+#include "intel_sideband.h"
+
+bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
+ enum i915_power_well_id power_well_id);
+
+const char *
+intel_display_power_domain_str(enum intel_display_power_domain domain)
+{
+ switch (domain) {
+ case POWER_DOMAIN_DISPLAY_CORE:
+ return "DISPLAY_CORE";
+ case POWER_DOMAIN_PIPE_A:
+ return "PIPE_A";
+ case POWER_DOMAIN_PIPE_B:
+ return "PIPE_B";
+ case POWER_DOMAIN_PIPE_C:
+ return "PIPE_C";
+ case POWER_DOMAIN_PIPE_A_PANEL_FITTER:
+ return "PIPE_A_PANEL_FITTER";
+ case POWER_DOMAIN_PIPE_B_PANEL_FITTER:
+ return "PIPE_B_PANEL_FITTER";
+ case POWER_DOMAIN_PIPE_C_PANEL_FITTER:
+ return "PIPE_C_PANEL_FITTER";
+ case POWER_DOMAIN_TRANSCODER_A:
+ return "TRANSCODER_A";
+ case POWER_DOMAIN_TRANSCODER_B:
+ return "TRANSCODER_B";
+ case POWER_DOMAIN_TRANSCODER_C:
+ return "TRANSCODER_C";
+ case POWER_DOMAIN_TRANSCODER_EDP:
+ return "TRANSCODER_EDP";
+ case POWER_DOMAIN_TRANSCODER_EDP_VDSC:
+ return "TRANSCODER_EDP_VDSC";
+ case POWER_DOMAIN_TRANSCODER_DSI_A:
+ return "TRANSCODER_DSI_A";
+ case POWER_DOMAIN_TRANSCODER_DSI_C:
+ return "TRANSCODER_DSI_C";
+ case POWER_DOMAIN_PORT_DDI_A_LANES:
+ return "PORT_DDI_A_LANES";
+ case POWER_DOMAIN_PORT_DDI_B_LANES:
+ return "PORT_DDI_B_LANES";
+ case POWER_DOMAIN_PORT_DDI_C_LANES:
+ return "PORT_DDI_C_LANES";
+ case POWER_DOMAIN_PORT_DDI_D_LANES:
+ return "PORT_DDI_D_LANES";
+ case POWER_DOMAIN_PORT_DDI_E_LANES:
+ return "PORT_DDI_E_LANES";
+ case POWER_DOMAIN_PORT_DDI_F_LANES:
+ return "PORT_DDI_F_LANES";
+ case POWER_DOMAIN_PORT_DDI_A_IO:
+ return "PORT_DDI_A_IO";
+ case POWER_DOMAIN_PORT_DDI_B_IO:
+ return "PORT_DDI_B_IO";
+ case POWER_DOMAIN_PORT_DDI_C_IO:
+ return "PORT_DDI_C_IO";
+ case POWER_DOMAIN_PORT_DDI_D_IO:
+ return "PORT_DDI_D_IO";
+ case POWER_DOMAIN_PORT_DDI_E_IO:
+ return "PORT_DDI_E_IO";
+ case POWER_DOMAIN_PORT_DDI_F_IO:
+ return "PORT_DDI_F_IO";
+ case POWER_DOMAIN_PORT_DSI:
+ return "PORT_DSI";
+ case POWER_DOMAIN_PORT_CRT:
+ return "PORT_CRT";
+ case POWER_DOMAIN_PORT_OTHER:
+ return "PORT_OTHER";
+ case POWER_DOMAIN_VGA:
+ return "VGA";
+ case POWER_DOMAIN_AUDIO:
+ return "AUDIO";
+ case POWER_DOMAIN_AUX_A:
+ return "AUX_A";
+ case POWER_DOMAIN_AUX_B:
+ return "AUX_B";
+ case POWER_DOMAIN_AUX_C:
+ return "AUX_C";
+ case POWER_DOMAIN_AUX_D:
+ return "AUX_D";
+ case POWER_DOMAIN_AUX_E:
+ return "AUX_E";
+ case POWER_DOMAIN_AUX_F:
+ return "AUX_F";
+ case POWER_DOMAIN_AUX_IO_A:
+ return "AUX_IO_A";
+ case POWER_DOMAIN_AUX_TBT1:
+ return "AUX_TBT1";
+ case POWER_DOMAIN_AUX_TBT2:
+ return "AUX_TBT2";
+ case POWER_DOMAIN_AUX_TBT3:
+ return "AUX_TBT3";
+ case POWER_DOMAIN_AUX_TBT4:
+ return "AUX_TBT4";
+ case POWER_DOMAIN_GMBUS:
+ return "GMBUS";
+ case POWER_DOMAIN_INIT:
+ return "INIT";
+ case POWER_DOMAIN_MODESET:
+ return "MODESET";
+ case POWER_DOMAIN_GT_IRQ:
+ return "GT_IRQ";
+ default:
+ MISSING_CASE(domain);
+ return "?";
+ }
+}
+
+static void intel_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ DRM_DEBUG_KMS("enabling %s\n", power_well->desc->name);
+ power_well->desc->ops->enable(dev_priv, power_well);
+ power_well->hw_enabled = true;
+}
+
+static void intel_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ DRM_DEBUG_KMS("disabling %s\n", power_well->desc->name);
+ power_well->hw_enabled = false;
+ power_well->desc->ops->disable(dev_priv, power_well);
+}
+
+static void intel_power_well_get(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ if (!power_well->count++)
+ intel_power_well_enable(dev_priv, power_well);
+}
+
+static void intel_power_well_put(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ WARN(!power_well->count, "Use count on power well %s is already zero",
+ power_well->desc->name);
+
+ if (!--power_well->count)
+ intel_power_well_disable(dev_priv, power_well);
+}
+
+/**
+ * __intel_display_power_is_enabled - unlocked check for a power domain
+ * @dev_priv: i915 device instance
+ * @domain: power domain to check
+ *
+ * This is the unlocked version of intel_display_power_is_enabled() and should
+ * only be used from error capture and recovery code where deadlocks are
+ * possible.
+ *
+ * Returns:
+ * True when the power domain is enabled, false otherwise.
+ */
+bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
+ enum intel_display_power_domain domain)
+{
+ struct i915_power_well *power_well;
+ bool is_enabled;
+
+ if (dev_priv->runtime_pm.suspended)
+ return false;
+
+ is_enabled = true;
+
+ for_each_power_domain_well_reverse(dev_priv, power_well, BIT_ULL(domain)) {
+ if (power_well->desc->always_on)
+ continue;
+
+ if (!power_well->hw_enabled) {
+ is_enabled = false;
+ break;
+ }
+ }
+
+ return is_enabled;
+}
+
+/**
+ * intel_display_power_is_enabled - check for a power domain
+ * @dev_priv: i915 device instance
+ * @domain: power domain to check
+ *
+ * This function can be used to check the hw power domain state. It is mostly
+ * used in hardware state readout functions. Everywhere else code should rely
+ * upon explicit power domain reference counting to ensure that the hardware
+ * block is powered up before accessing it.
+ *
+ * Callers must hold the relevant modesetting locks to ensure that concurrent
+ * threads can't disable the power well while the caller tries to read a few
+ * registers.
+ *
+ * Returns:
+ * True when the power domain is enabled, false otherwise.
+ */
+bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
+ enum intel_display_power_domain domain)
+{
+ struct i915_power_domains *power_domains;
+ bool ret;
+
+ power_domains = &dev_priv->power_domains;
+
+ mutex_lock(&power_domains->lock);
+ ret = __intel_display_power_is_enabled(dev_priv, domain);
+ mutex_unlock(&power_domains->lock);
+
+ return ret;
+}
+
+/*
+ * Starting with Haswell, we have a "Power Down Well" that can be turned off
+ * when not needed anymore. We have 4 registers that can request the power well
+ * to be enabled, and it will only be disabled if none of the registers is
+ * requesting it to be enabled.
+ */
+static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv,
+ u8 irq_pipe_mask, bool has_vga)
+{
+ struct pci_dev *pdev = dev_priv->drm.pdev;
+
+ /*
+ * After we re-enable the power well, if we touch VGA register 0x3d5
+ * we'll get unclaimed register interrupts. This stops after we write
+ * anything to the VGA MSR register. The vgacon module uses this
+ * register all the time, so if we unbind our driver and, as a
+ * consequence, bind vgacon, we'll get stuck in an infinite loop at
+ * console_unlock(). So make here we touch the VGA MSR register, making
+ * sure vgacon can keep working normally without triggering interrupts
+ * and error messages.
+ */
+ if (has_vga) {
+ vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
+ outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
+ vga_put(pdev, VGA_RSRC_LEGACY_IO);
+ }
+
+ if (irq_pipe_mask)
+ gen8_irq_power_well_post_enable(dev_priv, irq_pipe_mask);
+}
+
+static void hsw_power_well_pre_disable(struct drm_i915_private *dev_priv,
+ u8 irq_pipe_mask)
+{
+ if (irq_pipe_mask)
+ gen8_irq_power_well_pre_disable(dev_priv, irq_pipe_mask);
+}
+
+static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+ int pw_idx = power_well->desc->hsw.idx;
+
+ /* Timeout for PW1:10 us, AUX:not specified, other PWs:20 us. */
+ WARN_ON(intel_wait_for_register(&dev_priv->uncore,
+ regs->driver,
+ HSW_PWR_WELL_CTL_STATE(pw_idx),
+ HSW_PWR_WELL_CTL_STATE(pw_idx),
+ 1));
+}
+
+static u32 hsw_power_well_requesters(struct drm_i915_private *dev_priv,
+ const struct i915_power_well_regs *regs,
+ int pw_idx)
+{
+ u32 req_mask = HSW_PWR_WELL_CTL_REQ(pw_idx);
+ u32 ret;
+
+ ret = I915_READ(regs->bios) & req_mask ? 1 : 0;
+ ret |= I915_READ(regs->driver) & req_mask ? 2 : 0;
+ if (regs->kvmr.reg)
+ ret |= I915_READ(regs->kvmr) & req_mask ? 4 : 0;
+ ret |= I915_READ(regs->debug) & req_mask ? 8 : 0;
+
+ return ret;
+}
+
+static void hsw_wait_for_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+ int pw_idx = power_well->desc->hsw.idx;
+ bool disabled;
+ u32 reqs;
+
+ /*
+ * Bspec doesn't require waiting for PWs to get disabled, but still do
+ * this for paranoia. The known cases where a PW will be forced on:
+ * - a KVMR request on any power well via the KVMR request register
+ * - a DMC request on PW1 and MISC_IO power wells via the BIOS and
+ * DEBUG request registers
+ * Skip the wait in case any of the request bits are set and print a
+ * diagnostic message.
+ */
+ wait_for((disabled = !(I915_READ(regs->driver) &
+ HSW_PWR_WELL_CTL_STATE(pw_idx))) ||
+ (reqs = hsw_power_well_requesters(dev_priv, regs, pw_idx)), 1);
+ if (disabled)
+ return;
+
+ DRM_DEBUG_KMS("%s forced on (bios:%d driver:%d kvmr:%d debug:%d)\n",
+ power_well->desc->name,
+ !!(reqs & 1), !!(reqs & 2), !!(reqs & 4), !!(reqs & 8));
+}
+
+static void gen9_wait_for_power_well_fuses(struct drm_i915_private *dev_priv,
+ enum skl_power_gate pg)
+{
+ /* Timeout 5us for PG#0, for other PGs 1us */
+ WARN_ON(intel_wait_for_register(&dev_priv->uncore, SKL_FUSE_STATUS,
+ SKL_FUSE_PG_DIST_STATUS(pg),
+ SKL_FUSE_PG_DIST_STATUS(pg), 1));
+}
+
+static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+ int pw_idx = power_well->desc->hsw.idx;
+ bool wait_fuses = power_well->desc->hsw.has_fuses;
+ enum skl_power_gate uninitialized_var(pg);
+ u32 val;
+
+ if (wait_fuses) {
+ pg = INTEL_GEN(dev_priv) >= 11 ? ICL_PW_CTL_IDX_TO_PG(pw_idx) :
+ SKL_PW_CTL_IDX_TO_PG(pw_idx);
+ /*
+ * For PW1 we have to wait both for the PW0/PG0 fuse state
+ * before enabling the power well and PW1/PG1's own fuse
+ * state after the enabling. For all other power wells with
+ * fuses we only have to wait for that PW/PG's fuse state
+ * after the enabling.
+ */
+ if (pg == SKL_PG1)
+ gen9_wait_for_power_well_fuses(dev_priv, SKL_PG0);
+ }
+
+ val = I915_READ(regs->driver);
+ I915_WRITE(regs->driver, val | HSW_PWR_WELL_CTL_REQ(pw_idx));
+ hsw_wait_for_power_well_enable(dev_priv, power_well);
+
+ /* Display WA #1178: cnl */
+ if (IS_CANNONLAKE(dev_priv) &&
+ pw_idx >= GLK_PW_CTL_IDX_AUX_B &&
+ pw_idx <= CNL_PW_CTL_IDX_AUX_F) {
+ val = I915_READ(CNL_AUX_ANAOVRD1(pw_idx));
+ val |= CNL_AUX_ANAOVRD1_ENABLE | CNL_AUX_ANAOVRD1_LDO_BYPASS;
+ I915_WRITE(CNL_AUX_ANAOVRD1(pw_idx), val);
+ }
+
+ if (wait_fuses)
+ gen9_wait_for_power_well_fuses(dev_priv, pg);
+
+ hsw_power_well_post_enable(dev_priv,
+ power_well->desc->hsw.irq_pipe_mask,
+ power_well->desc->hsw.has_vga);
+}
+
+static void hsw_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+ int pw_idx = power_well->desc->hsw.idx;
+ u32 val;
+
+ hsw_power_well_pre_disable(dev_priv,
+ power_well->desc->hsw.irq_pipe_mask);
+
+ val = I915_READ(regs->driver);
+ I915_WRITE(regs->driver, val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
+ hsw_wait_for_power_well_disable(dev_priv, power_well);
+}
+
+#define ICL_AUX_PW_TO_PORT(pw_idx) ((pw_idx) - ICL_PW_CTL_IDX_AUX_A)
+
+static void
+icl_combo_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+ int pw_idx = power_well->desc->hsw.idx;
+ enum port port = ICL_AUX_PW_TO_PORT(pw_idx);
+ u32 val;
+
+ val = I915_READ(regs->driver);
+ I915_WRITE(regs->driver, val | HSW_PWR_WELL_CTL_REQ(pw_idx));
+
+ val = I915_READ(ICL_PORT_CL_DW12(port));
+ I915_WRITE(ICL_PORT_CL_DW12(port), val | ICL_LANE_ENABLE_AUX);
+
+ hsw_wait_for_power_well_enable(dev_priv, power_well);
+
+ /* Display WA #1178: icl */
+ if (IS_ICELAKE(dev_priv) &&
+ pw_idx >= ICL_PW_CTL_IDX_AUX_A && pw_idx <= ICL_PW_CTL_IDX_AUX_B &&
+ !intel_bios_is_port_edp(dev_priv, port)) {
+ val = I915_READ(ICL_AUX_ANAOVRD1(pw_idx));
+ val |= ICL_AUX_ANAOVRD1_ENABLE | ICL_AUX_ANAOVRD1_LDO_BYPASS;
+ I915_WRITE(ICL_AUX_ANAOVRD1(pw_idx), val);
+ }
+}
+
+static void
+icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+ int pw_idx = power_well->desc->hsw.idx;
+ enum port port = ICL_AUX_PW_TO_PORT(pw_idx);
+ u32 val;
+
+ val = I915_READ(ICL_PORT_CL_DW12(port));
+ I915_WRITE(ICL_PORT_CL_DW12(port), val & ~ICL_LANE_ENABLE_AUX);
+
+ val = I915_READ(regs->driver);
+ I915_WRITE(regs->driver, val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
+
+ hsw_wait_for_power_well_disable(dev_priv, power_well);
+}
+
+#define ICL_AUX_PW_TO_CH(pw_idx) \
+ ((pw_idx) - ICL_PW_CTL_IDX_AUX_A + AUX_CH_A)
+
+static void
+icl_tc_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ enum aux_ch aux_ch = ICL_AUX_PW_TO_CH(power_well->desc->hsw.idx);
+ u32 val;
+
+ val = I915_READ(DP_AUX_CH_CTL(aux_ch));
+ val &= ~DP_AUX_CH_CTL_TBT_IO;
+ if (power_well->desc->hsw.is_tc_tbt)
+ val |= DP_AUX_CH_CTL_TBT_IO;
+ I915_WRITE(DP_AUX_CH_CTL(aux_ch), val);
+
+ hsw_power_well_enable(dev_priv, power_well);
+}
+
+/*
+ * We should only use the power well if we explicitly asked the hardware to
+ * enable it, so check if it's enabled and also check if we've requested it to
+ * be enabled.
+ */
+static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+ enum i915_power_well_id id = power_well->desc->id;
+ int pw_idx = power_well->desc->hsw.idx;
+ u32 mask = HSW_PWR_WELL_CTL_REQ(pw_idx) |
+ HSW_PWR_WELL_CTL_STATE(pw_idx);
+ u32 val;
+
+ val = I915_READ(regs->driver);
+
+ /*
+ * On GEN9 big core due to a DMC bug the driver's request bits for PW1
+ * and the MISC_IO PW will be not restored, so check instead for the
+ * BIOS's own request bits, which are forced-on for these power wells
+ * when exiting DC5/6.
+ */
+ if (IS_GEN(dev_priv, 9) && !IS_GEN9_LP(dev_priv) &&
+ (id == SKL_DISP_PW_1 || id == SKL_DISP_PW_MISC_IO))
+ val |= I915_READ(regs->bios);
+
+ return (val & mask) == mask;
+}
+
+static void assert_can_enable_dc9(struct drm_i915_private *dev_priv)
+{
+ WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9),
+ "DC9 already programmed to be enabled.\n");
+ WARN_ONCE(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
+ "DC5 still not disabled to enable DC9.\n");
+ WARN_ONCE(I915_READ(HSW_PWR_WELL_CTL2) &
+ HSW_PWR_WELL_CTL_REQ(SKL_PW_CTL_IDX_PW_2),
+ "Power well 2 on.\n");
+ WARN_ONCE(intel_irqs_enabled(dev_priv),
+ "Interrupts not disabled yet.\n");
+
+ /*
+ * TODO: check for the following to verify the conditions to enter DC9
+ * state are satisfied:
+ * 1] Check relevant display engine registers to verify if mode set
+ * disable sequence was followed.
+ * 2] Check if display uninitialize sequence is initialized.
+ */
+}
+
+static void assert_can_disable_dc9(struct drm_i915_private *dev_priv)
+{
+ WARN_ONCE(intel_irqs_enabled(dev_priv),
+ "Interrupts not disabled yet.\n");
+ WARN_ONCE(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
+ "DC5 still not disabled.\n");
+
+ /*
+ * TODO: check for the following to verify DC9 state was indeed
+ * entered before programming to disable it:
+ * 1] Check relevant display engine registers to verify if mode
+ * set disable sequence was followed.
+ * 2] Check if display uninitialize sequence is initialized.
+ */
+}
+
+static void gen9_write_dc_state(struct drm_i915_private *dev_priv,
+ u32 state)
+{
+ int rewrites = 0;
+ int rereads = 0;
+ u32 v;
+
+ I915_WRITE(DC_STATE_EN, state);
+
+ /* It has been observed that disabling the dc6 state sometimes
+ * doesn't stick and dmc keeps returning old value. Make sure
+ * the write really sticks enough times and also force rewrite until
+ * we are confident that state is exactly what we want.
+ */
+ do {
+ v = I915_READ(DC_STATE_EN);
+
+ if (v != state) {
+ I915_WRITE(DC_STATE_EN, state);
+ rewrites++;
+ rereads = 0;
+ } else if (rereads++ > 5) {
+ break;
+ }
+
+ } while (rewrites < 100);
+
+ if (v != state)
+ DRM_ERROR("Writing dc state to 0x%x failed, now 0x%x\n",
+ state, v);
+
+ /* Most of the times we need one retry, avoid spam */
+ if (rewrites > 1)
+ DRM_DEBUG_KMS("Rewrote dc state to 0x%x %d times\n",
+ state, rewrites);
+}
+
+static u32 gen9_dc_mask(struct drm_i915_private *dev_priv)
+{
+ u32 mask;
+
+ mask = DC_STATE_EN_UPTO_DC5;
+ if (INTEL_GEN(dev_priv) >= 11)
+ mask |= DC_STATE_EN_UPTO_DC6 | DC_STATE_EN_DC9;
+ else if (IS_GEN9_LP(dev_priv))
+ mask |= DC_STATE_EN_DC9;
+ else
+ mask |= DC_STATE_EN_UPTO_DC6;
+
+ return mask;
+}
+
+void gen9_sanitize_dc_state(struct drm_i915_private *dev_priv)
+{
+ u32 val;
+
+ val = I915_READ(DC_STATE_EN) & gen9_dc_mask(dev_priv);
+
+ DRM_DEBUG_KMS("Resetting DC state tracking from %02x to %02x\n",
+ dev_priv->csr.dc_state, val);
+ dev_priv->csr.dc_state = val;
+}
+
+/**
+ * gen9_set_dc_state - set target display C power state
+ * @dev_priv: i915 device instance
+ * @state: target DC power state
+ * - DC_STATE_DISABLE
+ * - DC_STATE_EN_UPTO_DC5
+ * - DC_STATE_EN_UPTO_DC6
+ * - DC_STATE_EN_DC9
+ *
+ * Signal to DMC firmware/HW the target DC power state passed in @state.
+ * DMC/HW can turn off individual display clocks and power rails when entering
+ * a deeper DC power state (higher in number) and turns these back when exiting
+ * that state to a shallower power state (lower in number). The HW will decide
+ * when to actually enter a given state on an on-demand basis, for instance
+ * depending on the active state of display pipes. The state of display
+ * registers backed by affected power rails are saved/restored as needed.
+ *
+ * Based on the above enabling a deeper DC power state is asynchronous wrt.
+ * enabling it. Disabling a deeper power state is synchronous: for instance
+ * setting %DC_STATE_DISABLE won't complete until all HW resources are turned
+ * back on and register state is restored. This is guaranteed by the MMIO write
+ * to DC_STATE_EN blocking until the state is restored.
+ */
+static void gen9_set_dc_state(struct drm_i915_private *dev_priv, u32 state)
+{
+ u32 val;
+ u32 mask;
+
+ if (WARN_ON_ONCE(state & ~dev_priv->csr.allowed_dc_mask))
+ state &= dev_priv->csr.allowed_dc_mask;
+
+ val = I915_READ(DC_STATE_EN);
+ mask = gen9_dc_mask(dev_priv);
+ DRM_DEBUG_KMS("Setting DC state from %02x to %02x\n",
+ val & mask, state);
+
+ /* Check if DMC is ignoring our DC state requests */
+ if ((val & mask) != dev_priv->csr.dc_state)
+ DRM_ERROR("DC state mismatch (0x%x -> 0x%x)\n",
+ dev_priv->csr.dc_state, val & mask);
+
+ val &= ~mask;
+ val |= state;
+
+ gen9_write_dc_state(dev_priv, val);
+
+ dev_priv->csr.dc_state = val & mask;
+}
+
+void bxt_enable_dc9(struct drm_i915_private *dev_priv)
+{
+ assert_can_enable_dc9(dev_priv);
+
+ DRM_DEBUG_KMS("Enabling DC9\n");
+ /*
+ * Power sequencer reset is not needed on
+ * platforms with South Display Engine on PCH,
+ * because PPS registers are always on.
+ */
+ if (!HAS_PCH_SPLIT(dev_priv))
+ intel_power_sequencer_reset(dev_priv);
+ gen9_set_dc_state(dev_priv, DC_STATE_EN_DC9);
+}
+
+void bxt_disable_dc9(struct drm_i915_private *dev_priv)
+{
+ assert_can_disable_dc9(dev_priv);
+
+ DRM_DEBUG_KMS("Disabling DC9\n");
+
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+ intel_pps_unlock_regs_wa(dev_priv);
+}
+
+static void assert_csr_loaded(struct drm_i915_private *dev_priv)
+{
+ WARN_ONCE(!I915_READ(CSR_PROGRAM(0)),
+ "CSR program storage start is NULL\n");
+ WARN_ONCE(!I915_READ(CSR_SSP_BASE), "CSR SSP Base Not fine\n");
+ WARN_ONCE(!I915_READ(CSR_HTP_SKL), "CSR HTP Not fine\n");
+}
+
+static struct i915_power_well *
+lookup_power_well(struct drm_i915_private *dev_priv,
+ enum i915_power_well_id power_well_id)
+{
+ struct i915_power_well *power_well;
+
+ for_each_power_well(dev_priv, power_well)
+ if (power_well->desc->id == power_well_id)
+ return power_well;
+
+ /*
+ * It's not feasible to add error checking code to the callers since
+ * this condition really shouldn't happen and it doesn't even make sense
+ * to abort things like display initialization sequences. Just return
+ * the first power well and hope the WARN gets reported so we can fix
+ * our driver.
+ */
+ WARN(1, "Power well %d not defined for this platform\n", power_well_id);
+ return &dev_priv->power_domains.power_wells[0];
+}
+
+static void assert_can_enable_dc5(struct drm_i915_private *dev_priv)
+{
+ bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv,
+ SKL_DISP_PW_2);
+
+ WARN_ONCE(pg2_enabled, "PG2 not disabled to enable DC5.\n");
+
+ WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5),
+ "DC5 already programmed to be enabled.\n");
+ assert_rpm_wakelock_held(dev_priv);
+
+ assert_csr_loaded(dev_priv);
+}
+
+void gen9_enable_dc5(struct drm_i915_private *dev_priv)
+{
+ assert_can_enable_dc5(dev_priv);
+
+ DRM_DEBUG_KMS("Enabling DC5\n");
+
+ /* Wa Display #1183: skl,kbl,cfl */
+ if (IS_GEN9_BC(dev_priv))
+ I915_WRITE(GEN8_CHICKEN_DCPR_1, I915_READ(GEN8_CHICKEN_DCPR_1) |
+ SKL_SELECT_ALTERNATE_DC_EXIT);
+
+ gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5);
+}
+
+static void assert_can_enable_dc6(struct drm_i915_private *dev_priv)
+{
+ WARN_ONCE(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,
+ "Backlight is not disabled.\n");
+ WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6),
+ "DC6 already programmed to be enabled.\n");
+
+ assert_csr_loaded(dev_priv);
+}
+
+void skl_enable_dc6(struct drm_i915_private *dev_priv)
+{
+ assert_can_enable_dc6(dev_priv);
+
+ DRM_DEBUG_KMS("Enabling DC6\n");
+
+ /* Wa Display #1183: skl,kbl,cfl */
+ if (IS_GEN9_BC(dev_priv))
+ I915_WRITE(GEN8_CHICKEN_DCPR_1, I915_READ(GEN8_CHICKEN_DCPR_1) |
+ SKL_SELECT_ALTERNATE_DC_EXIT);
+
+ gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6);
+}
+
+static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
+ int pw_idx = power_well->desc->hsw.idx;
+ u32 mask = HSW_PWR_WELL_CTL_REQ(pw_idx);
+ u32 bios_req = I915_READ(regs->bios);
+
+ /* Take over the request bit if set by BIOS. */
+ if (bios_req & mask) {
+ u32 drv_req = I915_READ(regs->driver);
+
+ if (!(drv_req & mask))
+ I915_WRITE(regs->driver, drv_req | mask);
+ I915_WRITE(regs->bios, bios_req & ~mask);
+ }
+}
+
+static void bxt_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ bxt_ddi_phy_init(dev_priv, power_well->desc->bxt.phy);
+}
+
+static void bxt_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ bxt_ddi_phy_uninit(dev_priv, power_well->desc->bxt.phy);
+}
+
+static bool bxt_dpio_cmn_power_well_enabled(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ return bxt_ddi_phy_is_enabled(dev_priv, power_well->desc->bxt.phy);
+}
+
+static void bxt_verify_ddi_phy_power_wells(struct drm_i915_private *dev_priv)
+{
+ struct i915_power_well *power_well;
+
+ power_well = lookup_power_well(dev_priv, BXT_DISP_PW_DPIO_CMN_A);
+ if (power_well->count > 0)
+ bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);
+
+ power_well = lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
+ if (power_well->count > 0)
+ bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);
+
+ if (IS_GEMINILAKE(dev_priv)) {
+ power_well = lookup_power_well(dev_priv,
+ GLK_DISP_PW_DPIO_CMN_C);
+ if (power_well->count > 0)
+ bxt_ddi_phy_verify_state(dev_priv,
+ power_well->desc->bxt.phy);
+ }
+}
+
+static bool gen9_dc_off_power_well_enabled(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ return (I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5_DC6_MASK) == 0;
+}
+
+static void gen9_assert_dbuf_enabled(struct drm_i915_private *dev_priv)
+{
+ u32 tmp = I915_READ(DBUF_CTL);
+
+ WARN((tmp & (DBUF_POWER_STATE | DBUF_POWER_REQUEST)) !=
+ (DBUF_POWER_STATE | DBUF_POWER_REQUEST),
+ "Unexpected DBuf power power state (0x%08x)\n", tmp);
+}
+
+static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ struct intel_cdclk_state cdclk_state = {};
+
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+ dev_priv->display.get_cdclk(dev_priv, &cdclk_state);
+ /* Can't read out voltage_level so can't use intel_cdclk_changed() */
+ WARN_ON(intel_cdclk_needs_modeset(&dev_priv->cdclk.hw, &cdclk_state));
+
+ gen9_assert_dbuf_enabled(dev_priv);
+
+ if (IS_GEN9_LP(dev_priv))
+ bxt_verify_ddi_phy_power_wells(dev_priv);
+
+ if (INTEL_GEN(dev_priv) >= 11)
+ /*
+ * DMC retains HW context only for port A, the other combo
+ * PHY's HW context for port B is lost after DC transitions,
+ * so we need to restore it manually.
+ */
+ intel_combo_phy_init(dev_priv);
+}
+
+static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ if (!dev_priv->csr.dmc_payload)
+ return;
+
+ if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC6)
+ skl_enable_dc6(dev_priv);
+ else if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5)
+ gen9_enable_dc5(dev_priv);
+}
+
+static void i9xx_power_well_sync_hw_noop(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+}
+
+static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+}
+
+static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ return true;
+}
+
+static void i830_pipes_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ if ((I915_READ(PIPECONF(PIPE_A)) & PIPECONF_ENABLE) == 0)
+ i830_enable_pipe(dev_priv, PIPE_A);
+ if ((I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE) == 0)
+ i830_enable_pipe(dev_priv, PIPE_B);
+}
+
+static void i830_pipes_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ i830_disable_pipe(dev_priv, PIPE_B);
+ i830_disable_pipe(dev_priv, PIPE_A);
+}
+
+static bool i830_pipes_power_well_enabled(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ return I915_READ(PIPECONF(PIPE_A)) & PIPECONF_ENABLE &&
+ I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE;
+}
+
+static void i830_pipes_power_well_sync_hw(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ if (power_well->count > 0)
+ i830_pipes_power_well_enable(dev_priv, power_well);
+ else
+ i830_pipes_power_well_disable(dev_priv, power_well);
+}
+
+static void vlv_set_power_well(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well, bool enable)
+{
+ int pw_idx = power_well->desc->vlv.idx;
+ u32 mask;
+ u32 state;
+ u32 ctrl;
+
+ mask = PUNIT_PWRGT_MASK(pw_idx);
+ state = enable ? PUNIT_PWRGT_PWR_ON(pw_idx) :
+ PUNIT_PWRGT_PWR_GATE(pw_idx);
+
+ vlv_punit_get(dev_priv);
+
+#define COND \
+ ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state)
+
+ if (COND)
+ goto out;
+
+ ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL);
+ ctrl &= ~mask;
+ ctrl |= state;
+ vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl);
+
+ if (wait_for(COND, 100))
+ DRM_ERROR("timeout setting power well state %08x (%08x)\n",
+ state,
+ vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL));
+
+#undef COND
+
+out:
+ vlv_punit_put(dev_priv);
+}
+
+static void vlv_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ vlv_set_power_well(dev_priv, power_well, true);
+}
+
+static void vlv_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ vlv_set_power_well(dev_priv, power_well, false);
+}
+
+static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ int pw_idx = power_well->desc->vlv.idx;
+ bool enabled = false;
+ u32 mask;
+ u32 state;
+ u32 ctrl;
+
+ mask = PUNIT_PWRGT_MASK(pw_idx);
+ ctrl = PUNIT_PWRGT_PWR_ON(pw_idx);
+
+ vlv_punit_get(dev_priv);
+
+ state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask;
+ /*
+ * We only ever set the power-on and power-gate states, anything
+ * else is unexpected.
+ */
+ WARN_ON(state != PUNIT_PWRGT_PWR_ON(pw_idx) &&
+ state != PUNIT_PWRGT_PWR_GATE(pw_idx));
+ if (state == ctrl)
+ enabled = true;
+
+ /*
+ * A transient state at this point would mean some unexpected party
+ * is poking at the power controls too.
+ */
+ ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask;
+ WARN_ON(ctrl != state);
+
+ vlv_punit_put(dev_priv);
+
+ return enabled;
+}
+
+static void vlv_init_display_clock_gating(struct drm_i915_private *dev_priv)
+{
+ u32 val;
+
+ /*
+ * On driver load, a pipe may be active and driving a DSI display.
+ * Preserve DPOUNIT_CLOCK_GATE_DISABLE to avoid the pipe getting stuck
+ * (and never recovering) in this case. intel_dsi_post_disable() will
+ * clear it when we turn off the display.
+ */
+ val = I915_READ(DSPCLK_GATE_D);
+ val &= DPOUNIT_CLOCK_GATE_DISABLE;
+ val |= VRHUNIT_CLOCK_GATE_DISABLE;
+ I915_WRITE(DSPCLK_GATE_D, val);
+
+ /*
+ * Disable trickle feed and enable pnd deadline calculation
+ */
+ I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE);
+ I915_WRITE(CBR1_VLV, 0);
+
+ WARN_ON(dev_priv->rawclk_freq == 0);
+
+ I915_WRITE(RAWCLK_FREQ_VLV,
+ DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 1000));
+}
+
+static void vlv_display_power_well_init(struct drm_i915_private *dev_priv)
+{
+ struct intel_encoder *encoder;
+ enum pipe pipe;
+
+ /*
+ * Enable the CRI clock source so we can get at the
+ * display and the reference clock for VGA
+ * hotplug / manual detection. Supposedly DSI also
+ * needs the ref clock up and running.
+ *
+ * CHV DPLL B/C have some issues if VGA mode is enabled.
+ */
+ for_each_pipe(dev_priv, pipe) {
+ u32 val = I915_READ(DPLL(pipe));
+
+ val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
+ if (pipe != PIPE_A)
+ val |= DPLL_INTEGRATED_CRI_CLK_VLV;
+
+ I915_WRITE(DPLL(pipe), val);
+ }
+
+ vlv_init_display_clock_gating(dev_priv);
+
+ spin_lock_irq(&dev_priv->irq_lock);
+ valleyview_enable_display_irqs(dev_priv);
+ spin_unlock_irq(&dev_priv->irq_lock);
+
+ /*
+ * During driver initialization/resume we can avoid restoring the
+ * part of the HW/SW state that will be inited anyway explicitly.
+ */
+ if (dev_priv->power_domains.initializing)
+ return;
+
+ intel_hpd_init(dev_priv);
+
+ /* Re-enable the ADPA, if we have one */
+ for_each_intel_encoder(&dev_priv->drm, encoder) {
+ if (encoder->type == INTEL_OUTPUT_ANALOG)
+ intel_crt_reset(&encoder->base);
+ }
+
+ i915_redisable_vga_power_on(dev_priv);
+
+ intel_pps_unlock_regs_wa(dev_priv);
+}
+
+static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv)
+{
+ spin_lock_irq(&dev_priv->irq_lock);
+ valleyview_disable_display_irqs(dev_priv);
+ spin_unlock_irq(&dev_priv->irq_lock);
+
+ /* make sure we're done processing display irqs */
+ synchronize_irq(dev_priv->drm.irq);
+
+ intel_power_sequencer_reset(dev_priv);
+
+ /* Prevent us from re-enabling polling on accident in late suspend */
+ if (!dev_priv->drm.dev->power.is_suspended)
+ intel_hpd_poll_init(dev_priv);
+}
+
+static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ vlv_set_power_well(dev_priv, power_well, true);
+
+ vlv_display_power_well_init(dev_priv);
+}
+
+static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ vlv_display_power_well_deinit(dev_priv);
+
+ vlv_set_power_well(dev_priv, power_well, false);
+}
+
+static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ /* since ref/cri clock was enabled */
+ udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
+
+ vlv_set_power_well(dev_priv, power_well, true);
+
+ /*
+ * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx -
+ * 6. De-assert cmn_reset/side_reset. Same as VLV X0.
+ * a. GUnit 0x2110 bit[0] set to 1 (def 0)
+ * b. The other bits such as sfr settings / modesel may all
+ * be set to 0.
+ *
+ * This should only be done on init and resume from S3 with
+ * both PLLs disabled, or we risk losing DPIO and PLL
+ * synchronization.
+ */
+ I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST);
+}
+
+static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ enum pipe pipe;
+
+ for_each_pipe(dev_priv, pipe)
+ assert_pll_disabled(dev_priv, pipe);
+
+ /* Assert common reset */
+ I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST);
+
+ vlv_set_power_well(dev_priv, power_well, false);
+}
+
+#define POWER_DOMAIN_MASK (GENMASK_ULL(POWER_DOMAIN_NUM - 1, 0))
+
+#define BITS_SET(val, bits) (((val) & (bits)) == (bits))
+
+static void assert_chv_phy_status(struct drm_i915_private *dev_priv)
+{
+ struct i915_power_well *cmn_bc =
+ lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
+ struct i915_power_well *cmn_d =
+ lookup_power_well(dev_priv, CHV_DISP_PW_DPIO_CMN_D);
+ u32 phy_control = dev_priv->chv_phy_control;
+ u32 phy_status = 0;
+ u32 phy_status_mask = 0xffffffff;
+
+ /*
+ * The BIOS can leave the PHY is some weird state
+ * where it doesn't fully power down some parts.
+ * Disable the asserts until the PHY has been fully
+ * reset (ie. the power well has been disabled at
+ * least once).
+ */
+ if (!dev_priv->chv_phy_assert[DPIO_PHY0])
+ phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0) |
+ PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0) |
+ PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1) |
+ PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1) |
+ PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0) |
+ PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1));
+
+ if (!dev_priv->chv_phy_assert[DPIO_PHY1])
+ phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0) |
+ PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) |
+ PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1));
+
+ if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
+ phy_status |= PHY_POWERGOOD(DPIO_PHY0);
+
+ /* this assumes override is only used to enable lanes */
+ if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0)) == 0)
+ phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0);
+
+ if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1)) == 0)
+ phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1);
+
+ /* CL1 is on whenever anything is on in either channel */
+ if (BITS_SET(phy_control,
+ PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0) |
+ PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)))
+ phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0);
+
+ /*
+ * The DPLLB check accounts for the pipe B + port A usage
+ * with CL2 powered up but all the lanes in the second channel
+ * powered down.
+ */
+ if (BITS_SET(phy_control,
+ PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)) &&
+ (I915_READ(DPLL(PIPE_B)) & DPLL_VCO_ENABLE) == 0)
+ phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1);
+
+ if (BITS_SET(phy_control,
+ PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH0)))
+ phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0);
+ if (BITS_SET(phy_control,
+ PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH0)))
+ phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1);
+
+ if (BITS_SET(phy_control,
+ PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH1)))
+ phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0);
+ if (BITS_SET(phy_control,
+ PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH1)))
+ phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1);
+ }
+
+ if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
+ phy_status |= PHY_POWERGOOD(DPIO_PHY1);
+
+ /* this assumes override is only used to enable lanes */
+ if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0)) == 0)
+ phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0);
+
+ if (BITS_SET(phy_control,
+ PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0)))
+ phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0);
+
+ if (BITS_SET(phy_control,
+ PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY1, DPIO_CH0)))
+ phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0);
+ if (BITS_SET(phy_control,
+ PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY1, DPIO_CH0)))
+ phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1);
+ }
+
+ phy_status &= phy_status_mask;
+
+ /*
+ * The PHY may be busy with some initial calibration and whatnot,
+ * so the power state can take a while to actually change.
+ */
+ if (intel_wait_for_register(&dev_priv->uncore,
+ DISPLAY_PHY_STATUS,
+ phy_status_mask,
+ phy_status,
+ 10))
+ DRM_ERROR("Unexpected PHY_STATUS 0x%08x, expected 0x%08x (PHY_CONTROL=0x%08x)\n",
+ I915_READ(DISPLAY_PHY_STATUS) & phy_status_mask,
+ phy_status, dev_priv->chv_phy_control);
+}
+
+#undef BITS_SET
+
+static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ enum dpio_phy phy;
+ enum pipe pipe;
+ u32 tmp;
+
+ WARN_ON_ONCE(power_well->desc->id != VLV_DISP_PW_DPIO_CMN_BC &&
+ power_well->desc->id != CHV_DISP_PW_DPIO_CMN_D);
+
+ if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
+ pipe = PIPE_A;
+ phy = DPIO_PHY0;
+ } else {
+ pipe = PIPE_C;
+ phy = DPIO_PHY1;
+ }
+
+ /* since ref/cri clock was enabled */
+ udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
+ vlv_set_power_well(dev_priv, power_well, true);
+
+ /* Poll for phypwrgood signal */
+ if (intel_wait_for_register(&dev_priv->uncore,
+ DISPLAY_PHY_STATUS,
+ PHY_POWERGOOD(phy),
+ PHY_POWERGOOD(phy),
+ 1))
+ DRM_ERROR("Display PHY %d is not power up\n", phy);
+
+ vlv_dpio_get(dev_priv);
+
+ /* Enable dynamic power down */
+ tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW28);
+ tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN |
+ DPIO_SUS_CLK_CONFIG_GATE_CLKREQ;
+ vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp);
+
+ if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
+ tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1);
+ tmp |= DPIO_DYNPWRDOWNEN_CH1;
+ vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp);
+ } else {
+ /*
+ * Force the non-existing CL2 off. BXT does this
+ * too, so maybe it saves some power even though
+ * CL2 doesn't exist?
+ */
+ tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30);
+ tmp |= DPIO_CL2_LDOFUSE_PWRENB;
+ vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, tmp);
+ }
+
+ vlv_dpio_put(dev_priv);
+
+ dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(phy);
+ I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
+
+ DRM_DEBUG_KMS("Enabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n",
+ phy, dev_priv->chv_phy_control);
+
+ assert_chv_phy_status(dev_priv);
+}
+
+static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ enum dpio_phy phy;
+
+ WARN_ON_ONCE(power_well->desc->id != VLV_DISP_PW_DPIO_CMN_BC &&
+ power_well->desc->id != CHV_DISP_PW_DPIO_CMN_D);
+
+ if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
+ phy = DPIO_PHY0;
+ assert_pll_disabled(dev_priv, PIPE_A);
+ assert_pll_disabled(dev_priv, PIPE_B);
+ } else {
+ phy = DPIO_PHY1;
+ assert_pll_disabled(dev_priv, PIPE_C);
+ }
+
+ dev_priv->chv_phy_control &= ~PHY_COM_LANE_RESET_DEASSERT(phy);
+ I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
+
+ vlv_set_power_well(dev_priv, power_well, false);
+
+ DRM_DEBUG_KMS("Disabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n",
+ phy, dev_priv->chv_phy_control);
+
+ /* PHY is fully reset now, so we can enable the PHY state asserts */
+ dev_priv->chv_phy_assert[phy] = true;
+
+ assert_chv_phy_status(dev_priv);
+}
+
+static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpio_phy phy,
+ enum dpio_channel ch, bool override, unsigned int mask)
+{
+ enum pipe pipe = phy == DPIO_PHY0 ? PIPE_A : PIPE_C;
+ u32 reg, val, expected, actual;
+
+ /*
+ * The BIOS can leave the PHY is some weird state
+ * where it doesn't fully power down some parts.
+ * Disable the asserts until the PHY has been fully
+ * reset (ie. the power well has been disabled at
+ * least once).
+ */
+ if (!dev_priv->chv_phy_assert[phy])
+ return;
+
+ if (ch == DPIO_CH0)
+ reg = _CHV_CMN_DW0_CH0;
+ else
+ reg = _CHV_CMN_DW6_CH1;
+
+ vlv_dpio_get(dev_priv);
+ val = vlv_dpio_read(dev_priv, pipe, reg);
+ vlv_dpio_put(dev_priv);
+
+ /*
+ * This assumes !override is only used when the port is disabled.
+ * All lanes should power down even without the override when
+ * the port is disabled.
+ */
+ if (!override || mask == 0xf) {
+ expected = DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN;
+ /*
+ * If CH1 common lane is not active anymore
+ * (eg. for pipe B DPLL) the entire channel will
+ * shut down, which causes the common lane registers
+ * to read as 0. That means we can't actually check
+ * the lane power down status bits, but as the entire
+ * register reads as 0 it's a good indication that the
+ * channel is indeed entirely powered down.
+ */
+ if (ch == DPIO_CH1 && val == 0)
+ expected = 0;
+ } else if (mask != 0x0) {
+ expected = DPIO_ANYDL_POWERDOWN;
+ } else {
+ expected = 0;
+ }
+
+ if (ch == DPIO_CH0)
+ actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH0;
+ else
+ actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH1;
+ actual &= DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN;
+
+ WARN(actual != expected,
+ "Unexpected DPIO lane power down: all %d, any %d. Expected: all %d, any %d. (0x%x = 0x%08x)\n",
+ !!(actual & DPIO_ALLDL_POWERDOWN), !!(actual & DPIO_ANYDL_POWERDOWN),
+ !!(expected & DPIO_ALLDL_POWERDOWN), !!(expected & DPIO_ANYDL_POWERDOWN),
+ reg, val);
+}
+
+bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy,
+ enum dpio_channel ch, bool override)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ bool was_override;
+
+ mutex_lock(&power_domains->lock);
+
+ was_override = dev_priv->chv_phy_control & PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
+
+ if (override == was_override)
+ goto out;
+
+ if (override)
+ dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
+ else
+ dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
+
+ I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
+
+ DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d (DPIO_PHY_CONTROL=0x%08x)\n",
+ phy, ch, dev_priv->chv_phy_control);
+
+ assert_chv_phy_status(dev_priv);
+
+out:
+ mutex_unlock(&power_domains->lock);
+
+ return was_override;
+}
+
+void chv_phy_powergate_lanes(struct intel_encoder *encoder,
+ bool override, unsigned int mask)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ enum dpio_phy phy = vlv_dport_to_phy(enc_to_dig_port(&encoder->base));
+ enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base));
+
+ mutex_lock(&power_domains->lock);
+
+ dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD(0xf, phy, ch);
+ dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, phy, ch);
+
+ if (override)
+ dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
+ else
+ dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
+
+ I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
+
+ DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d lanes 0x%x (PHY_CONTROL=0x%08x)\n",
+ phy, ch, mask, dev_priv->chv_phy_control);
+
+ assert_chv_phy_status(dev_priv);
+
+ assert_chv_phy_powergate(dev_priv, phy, ch, override, mask);
+
+ mutex_unlock(&power_domains->lock);
+}
+
+static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ enum pipe pipe = PIPE_A;
+ bool enabled;
+ u32 state, ctrl;
+
+ vlv_punit_get(dev_priv);
+
+ state = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSS_MASK(pipe);
+ /*
+ * We only ever set the power-on and power-gate states, anything
+ * else is unexpected.
+ */
+ WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe));
+ enabled = state == DP_SSS_PWR_ON(pipe);
+
+ /*
+ * A transient state at this point would mean some unexpected party
+ * is poking at the power controls too.
+ */
+ ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSC_MASK(pipe);
+ WARN_ON(ctrl << 16 != state);
+
+ vlv_punit_put(dev_priv);
+
+ return enabled;
+}
+
+static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well,
+ bool enable)
+{
+ enum pipe pipe = PIPE_A;
+ u32 state;
+ u32 ctrl;
+
+ state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe);
+
+ vlv_punit_get(dev_priv);
+
+#define COND \
+ ((vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSS_MASK(pipe)) == state)
+
+ if (COND)
+ goto out;
+
+ ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM);
+ ctrl &= ~DP_SSC_MASK(pipe);
+ ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe);
+ vlv_punit_write(dev_priv, PUNIT_REG_DSPSSPM, ctrl);
+
+ if (wait_for(COND, 100))
+ DRM_ERROR("timeout setting power well state %08x (%08x)\n",
+ state,
+ vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM));
+
+#undef COND
+
+out:
+ vlv_punit_put(dev_priv);
+}
+
+static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ chv_set_pipe_power_well(dev_priv, power_well, true);
+
+ vlv_display_power_well_init(dev_priv);
+}
+
+static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv,
+ struct i915_power_well *power_well)
+{
+ vlv_display_power_well_deinit(dev_priv);
+
+ chv_set_pipe_power_well(dev_priv, power_well, false);
+}
+
+static u64 __async_put_domains_mask(struct i915_power_domains *power_domains)
+{
+ return power_domains->async_put_domains[0] |
+ power_domains->async_put_domains[1];
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
+
+static bool
+assert_async_put_domain_masks_disjoint(struct i915_power_domains *power_domains)
+{
+ return !WARN_ON(power_domains->async_put_domains[0] &
+ power_domains->async_put_domains[1]);
+}
+
+static bool
+__async_put_domains_state_ok(struct i915_power_domains *power_domains)
+{
+ enum intel_display_power_domain domain;
+ bool err = false;
+
+ err |= !assert_async_put_domain_masks_disjoint(power_domains);
+ err |= WARN_ON(!!power_domains->async_put_wakeref !=
+ !!__async_put_domains_mask(power_domains));
+
+ for_each_power_domain(domain, __async_put_domains_mask(power_domains))
+ err |= WARN_ON(power_domains->domain_use_count[domain] != 1);
+
+ return !err;
+}
+
+static void print_power_domains(struct i915_power_domains *power_domains,
+ const char *prefix, u64 mask)
+{
+ enum intel_display_power_domain domain;
+
+ DRM_DEBUG_DRIVER("%s (%lu):\n", prefix, hweight64(mask));
+ for_each_power_domain(domain, mask)
+ DRM_DEBUG_DRIVER("%s use_count %d\n",
+ intel_display_power_domain_str(domain),
+ power_domains->domain_use_count[domain]);
+}
+
+static void
+print_async_put_domains_state(struct i915_power_domains *power_domains)
+{
+ DRM_DEBUG_DRIVER("async_put_wakeref %u\n",
+ power_domains->async_put_wakeref);
+
+ print_power_domains(power_domains, "async_put_domains[0]",
+ power_domains->async_put_domains[0]);
+ print_power_domains(power_domains, "async_put_domains[1]",
+ power_domains->async_put_domains[1]);
+}
+
+static void
+verify_async_put_domains_state(struct i915_power_domains *power_domains)
+{
+ if (!__async_put_domains_state_ok(power_domains))
+ print_async_put_domains_state(power_domains);
+}
+
+#else
+
+static void
+assert_async_put_domain_masks_disjoint(struct i915_power_domains *power_domains)
+{
+}
+
+static void
+verify_async_put_domains_state(struct i915_power_domains *power_domains)
+{
+}
+
+#endif /* CONFIG_DRM_I915_DEBUG_RUNTIME_PM */
+
+static u64 async_put_domains_mask(struct i915_power_domains *power_domains)
+{
+ assert_async_put_domain_masks_disjoint(power_domains);
+
+ return __async_put_domains_mask(power_domains);
+}
+
+static void
+async_put_domains_clear_domain(struct i915_power_domains *power_domains,
+ enum intel_display_power_domain domain)
+{
+ assert_async_put_domain_masks_disjoint(power_domains);
+
+ power_domains->async_put_domains[0] &= ~BIT_ULL(domain);
+ power_domains->async_put_domains[1] &= ~BIT_ULL(domain);
+}
+
+static bool
+intel_display_power_grab_async_put_ref(struct drm_i915_private *dev_priv,
+ enum intel_display_power_domain domain)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ bool ret = false;
+
+ if (!(async_put_domains_mask(power_domains) & BIT_ULL(domain)))
+ goto out_verify;
+
+ async_put_domains_clear_domain(power_domains, domain);
+
+ ret = true;
+
+ if (async_put_domains_mask(power_domains))
+ goto out_verify;
+
+ cancel_delayed_work(&power_domains->async_put_work);
+ intel_runtime_pm_put_raw(dev_priv,
+ fetch_and_zero(&power_domains->async_put_wakeref));
+out_verify:
+ verify_async_put_domains_state(power_domains);
+
+ return ret;
+}
+
+static void
+__intel_display_power_get_domain(struct drm_i915_private *dev_priv,
+ enum intel_display_power_domain domain)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ struct i915_power_well *power_well;
+
+ if (intel_display_power_grab_async_put_ref(dev_priv, domain))
+ return;
+
+ for_each_power_domain_well(dev_priv, power_well, BIT_ULL(domain))
+ intel_power_well_get(dev_priv, power_well);
+
+ power_domains->domain_use_count[domain]++;
+}
+
+/**
+ * intel_display_power_get - grab a power domain reference
+ * @dev_priv: i915 device instance
+ * @domain: power domain to reference
+ *
+ * This function grabs a power domain reference for @domain and ensures that the
+ * power domain and all its parents are powered up. Therefore users should only
+ * grab a reference to the innermost power domain they need.
+ *
+ * Any power domain reference obtained by this function must have a symmetric
+ * call to intel_display_power_put() to release the reference again.
+ */
+intel_wakeref_t intel_display_power_get(struct drm_i915_private *dev_priv,
+ enum intel_display_power_domain domain)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ intel_wakeref_t wakeref = intel_runtime_pm_get(dev_priv);
+
+ mutex_lock(&power_domains->lock);
+ __intel_display_power_get_domain(dev_priv, domain);
+ mutex_unlock(&power_domains->lock);
+
+ return wakeref;
+}
+
+/**
+ * intel_display_power_get_if_enabled - grab a reference for an enabled display power domain
+ * @dev_priv: i915 device instance
+ * @domain: power domain to reference
+ *
+ * This function grabs a power domain reference for @domain and ensures that the
+ * power domain and all its parents are powered up. Therefore users should only
+ * grab a reference to the innermost power domain they need.
+ *
+ * Any power domain reference obtained by this function must have a symmetric
+ * call to intel_display_power_put() to release the reference again.
+ */
+intel_wakeref_t
+intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv,
+ enum intel_display_power_domain domain)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ intel_wakeref_t wakeref;
+ bool is_enabled;
+
+ wakeref = intel_runtime_pm_get_if_in_use(dev_priv);
+ if (!wakeref)
+ return false;
+
+ mutex_lock(&power_domains->lock);
+
+ if (__intel_display_power_is_enabled(dev_priv, domain)) {
+ __intel_display_power_get_domain(dev_priv, domain);
+ is_enabled = true;
+ } else {
+ is_enabled = false;
+ }
+
+ mutex_unlock(&power_domains->lock);
+
+ if (!is_enabled) {
+ intel_runtime_pm_put(dev_priv, wakeref);
+ wakeref = 0;
+ }
+
+ return wakeref;
+}
+
+static void
+__intel_display_power_put_domain(struct drm_i915_private *dev_priv,
+ enum intel_display_power_domain domain)
+{
+ struct i915_power_domains *power_domains;
+ struct i915_power_well *power_well;
+ const char *name = intel_display_power_domain_str(domain);
+
+ power_domains = &dev_priv->power_domains;
+
+ WARN(!power_domains->domain_use_count[domain],
+ "Use count on domain %s is already zero\n",
+ name);
+ WARN(async_put_domains_mask(power_domains) & BIT_ULL(domain),
+ "Async disabling of domain %s is pending\n",
+ name);
+
+ power_domains->domain_use_count[domain]--;
+
+ for_each_power_domain_well_reverse(dev_priv, power_well, BIT_ULL(domain))
+ intel_power_well_put(dev_priv, power_well);
+}
+
+static void __intel_display_power_put(struct drm_i915_private *dev_priv,
+ enum intel_display_power_domain domain)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+
+ mutex_lock(&power_domains->lock);
+ __intel_display_power_put_domain(dev_priv, domain);
+ mutex_unlock(&power_domains->lock);
+}
+
+/**
+ * intel_display_power_put_unchecked - release an unchecked power domain reference
+ * @dev_priv: i915 device instance
+ * @domain: power domain to reference
+ *
+ * This function drops the power domain reference obtained by
+ * intel_display_power_get() and might power down the corresponding hardware
+ * block right away if this is the last reference.
+ *
+ * This function exists only for historical reasons and should be avoided in
+ * new code, as the correctness of its use cannot be checked. Always use
+ * intel_display_power_put() instead.
+ */
+void intel_display_power_put_unchecked(struct drm_i915_private *dev_priv,
+ enum intel_display_power_domain domain)
+{
+ __intel_display_power_put(dev_priv, domain);
+ intel_runtime_pm_put_unchecked(dev_priv);
+}
+
+static void
+queue_async_put_domains_work(struct i915_power_domains *power_domains,
+ intel_wakeref_t wakeref)
+{
+ WARN_ON(power_domains->async_put_wakeref);
+ power_domains->async_put_wakeref = wakeref;
+ WARN_ON(!queue_delayed_work(system_unbound_wq,
+ &power_domains->async_put_work,
+ msecs_to_jiffies(100)));
+}
+
+static void
+release_async_put_domains(struct i915_power_domains *power_domains, u64 mask)
+{
+ struct drm_i915_private *dev_priv =
+ container_of(power_domains, struct drm_i915_private,
+ power_domains);
+ enum intel_display_power_domain domain;
+ intel_wakeref_t wakeref;
+
+ /*
+ * The caller must hold already raw wakeref, upgrade that to a proper
+ * wakeref to make the state checker happy about the HW access during
+ * power well disabling.
+ */
+ assert_rpm_raw_wakeref_held(dev_priv);
+ wakeref = intel_runtime_pm_get(dev_priv);
+
+ for_each_power_domain(domain, mask) {
+ /* Clear before put, so put's sanity check is happy. */
+ async_put_domains_clear_domain(power_domains, domain);
+ __intel_display_power_put_domain(dev_priv, domain);
+ }
+
+ intel_runtime_pm_put(dev_priv, wakeref);
+}
+
+static void
+intel_display_power_put_async_work(struct work_struct *work)
+{
+ struct drm_i915_private *dev_priv =
+ container_of(work, struct drm_i915_private,
+ power_domains.async_put_work.work);
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ intel_wakeref_t new_work_wakeref = intel_runtime_pm_get_raw(dev_priv);
+ intel_wakeref_t old_work_wakeref = 0;
+
+ mutex_lock(&power_domains->lock);
+
+ /*
+ * Bail out if all the domain refs pending to be released were grabbed
+ * by subsequent gets or a flush_work.
+ */
+ old_work_wakeref = fetch_and_zero(&power_domains->async_put_wakeref);
+ if (!old_work_wakeref)
+ goto out_verify;
+
+ release_async_put_domains(power_domains,
+ power_domains->async_put_domains[0]);
+
+ /* Requeue the work if more domains were async put meanwhile. */
+ if (power_domains->async_put_domains[1]) {
+ power_domains->async_put_domains[0] =
+ fetch_and_zero(&power_domains->async_put_domains[1]);
+ queue_async_put_domains_work(power_domains,
+ fetch_and_zero(&new_work_wakeref));
+ }
+
+out_verify:
+ verify_async_put_domains_state(power_domains);
+
+ mutex_unlock(&power_domains->lock);
+
+ if (old_work_wakeref)
+ intel_runtime_pm_put_raw(dev_priv, old_work_wakeref);
+ if (new_work_wakeref)
+ intel_runtime_pm_put_raw(dev_priv, new_work_wakeref);
+}
+
+/**
+ * intel_display_power_put_async - release a power domain reference asynchronously
+ * @i915: i915 device instance
+ * @domain: power domain to reference
+ * @wakeref: wakeref acquired for the reference that is being released
+ *
+ * This function drops the power domain reference obtained by
+ * intel_display_power_get*() and schedules a work to power down the
+ * corresponding hardware block if this is the last reference.
+ */
+void __intel_display_power_put_async(struct drm_i915_private *i915,
+ enum intel_display_power_domain domain,
+ intel_wakeref_t wakeref)
+{
+ struct i915_power_domains *power_domains = &i915->power_domains;
+ intel_wakeref_t work_wakeref = intel_runtime_pm_get_raw(i915);
+
+ mutex_lock(&power_domains->lock);
+
+ if (power_domains->domain_use_count[domain] > 1) {
+ __intel_display_power_put_domain(i915, domain);
+
+ goto out_verify;
+ }
+
+ WARN_ON(power_domains->domain_use_count[domain] != 1);
+
+ /* Let a pending work requeue itself or queue a new one. */
+ if (power_domains->async_put_wakeref) {
+ power_domains->async_put_domains[1] |= BIT_ULL(domain);
+ } else {
+ power_domains->async_put_domains[0] |= BIT_ULL(domain);
+ queue_async_put_domains_work(power_domains,
+ fetch_and_zero(&work_wakeref));
+ }
+
+out_verify:
+ verify_async_put_domains_state(power_domains);
+
+ mutex_unlock(&power_domains->lock);
+
+ if (work_wakeref)
+ intel_runtime_pm_put_raw(i915, work_wakeref);
+
+ intel_runtime_pm_put(i915, wakeref);
+}
+
+/**
+ * intel_display_power_flush_work - flushes the async display power disabling work
+ * @i915: i915 device instance
+ *
+ * Flushes any pending work that was scheduled by a preceding
+ * intel_display_power_put_async() call, completing the disabling of the
+ * corresponding power domains.
+ *
+ * Note that the work handler function may still be running after this
+ * function returns; to ensure that the work handler isn't running use
+ * intel_display_power_flush_work_sync() instead.
+ */
+void intel_display_power_flush_work(struct drm_i915_private *i915)
+{
+ struct i915_power_domains *power_domains = &i915->power_domains;
+ intel_wakeref_t work_wakeref;
+
+ mutex_lock(&power_domains->lock);
+
+ work_wakeref = fetch_and_zero(&power_domains->async_put_wakeref);
+ if (!work_wakeref)
+ goto out_verify;
+
+ release_async_put_domains(power_domains,
+ async_put_domains_mask(power_domains));
+ cancel_delayed_work(&power_domains->async_put_work);
+
+out_verify:
+ verify_async_put_domains_state(power_domains);
+
+ mutex_unlock(&power_domains->lock);
+
+ if (work_wakeref)
+ intel_runtime_pm_put_raw(i915, work_wakeref);
+}
+
+/**
+ * intel_display_power_flush_work_sync - flushes and syncs the async display power disabling work
+ * @i915: i915 device instance
+ *
+ * Like intel_display_power_flush_work(), but also ensure that the work
+ * handler function is not running any more when this function returns.
+ */
+static void
+intel_display_power_flush_work_sync(struct drm_i915_private *i915)
+{
+ struct i915_power_domains *power_domains = &i915->power_domains;
+
+ intel_display_power_flush_work(i915);
+ cancel_delayed_work_sync(&power_domains->async_put_work);
+
+ verify_async_put_domains_state(power_domains);
+
+ WARN_ON(power_domains->async_put_wakeref);
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
+/**
+ * intel_display_power_put - release a power domain reference
+ * @dev_priv: i915 device instance
+ * @domain: power domain to reference
+ * @wakeref: wakeref acquired for the reference that is being released
+ *
+ * This function drops the power domain reference obtained by
+ * intel_display_power_get() and might power down the corresponding hardware
+ * block right away if this is the last reference.
+ */
+void intel_display_power_put(struct drm_i915_private *dev_priv,
+ enum intel_display_power_domain domain,
+ intel_wakeref_t wakeref)
+{
+ __intel_display_power_put(dev_priv, domain);
+ intel_runtime_pm_put(dev_priv, wakeref);
+}
+#endif
+
+#define I830_PIPES_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PIPE_A) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DISPLAY_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_DISPLAY_CORE) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_A) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DSI) | \
+ BIT_ULL(POWER_DOMAIN_PORT_CRT) | \
+ BIT_ULL(POWER_DOMAIN_VGA) | \
+ BIT_ULL(POWER_DOMAIN_AUDIO) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_GMBUS) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DPIO_CMN_BC_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_CRT) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define CHV_DISPLAY_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_DISPLAY_CORE) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_A) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DSI) | \
+ BIT_ULL(POWER_DOMAIN_VGA) | \
+ BIT_ULL(POWER_DOMAIN_AUDIO) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_AUX_D) | \
+ BIT_ULL(POWER_DOMAIN_GMBUS) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define CHV_DPIO_CMN_BC_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define CHV_DPIO_CMN_D_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_D) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define HSW_DISPLAY_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PIPE_B) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_CRT) | /* DDI E */ \
+ BIT_ULL(POWER_DOMAIN_VGA) | \
+ BIT_ULL(POWER_DOMAIN_AUDIO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define BDW_DISPLAY_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PIPE_B) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_CRT) | /* DDI E */ \
+ BIT_ULL(POWER_DOMAIN_VGA) | \
+ BIT_ULL(POWER_DOMAIN_AUDIO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_E_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_AUX_D) | \
+ BIT_ULL(POWER_DOMAIN_AUDIO) | \
+ BIT_ULL(POWER_DOMAIN_VGA) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define SKL_DISPLAY_DDI_IO_A_E_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define SKL_DISPLAY_DDI_IO_B_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define SKL_DISPLAY_DDI_IO_C_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define SKL_DISPLAY_DDI_IO_D_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define SKL_DISPLAY_DC_OFF_POWER_DOMAINS ( \
+ SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
+ BIT_ULL(POWER_DOMAIN_GT_IRQ) | \
+ BIT_ULL(POWER_DOMAIN_MODESET) | \
+ BIT_ULL(POWER_DOMAIN_AUX_A) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_AUDIO) | \
+ BIT_ULL(POWER_DOMAIN_VGA) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define BXT_DISPLAY_DC_OFF_POWER_DOMAINS ( \
+ BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
+ BIT_ULL(POWER_DOMAIN_GT_IRQ) | \
+ BIT_ULL(POWER_DOMAIN_MODESET) | \
+ BIT_ULL(POWER_DOMAIN_AUX_A) | \
+ BIT_ULL(POWER_DOMAIN_GMBUS) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define BXT_DPIO_CMN_A_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_A_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_A) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define BXT_DPIO_CMN_BC_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_AUDIO) | \
+ BIT_ULL(POWER_DOMAIN_VGA) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DISPLAY_DDI_IO_A_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO))
+#define GLK_DISPLAY_DDI_IO_B_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO))
+#define GLK_DISPLAY_DDI_IO_C_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO))
+#define GLK_DPIO_CMN_A_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_A_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_A) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DPIO_CMN_B_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DPIO_CMN_C_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DISPLAY_AUX_A_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_A) | \
+ BIT_ULL(POWER_DOMAIN_AUX_IO_A) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DISPLAY_AUX_B_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DISPLAY_AUX_C_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define GLK_DISPLAY_DC_OFF_POWER_DOMAINS ( \
+ GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
+ BIT_ULL(POWER_DOMAIN_GT_IRQ) | \
+ BIT_ULL(POWER_DOMAIN_MODESET) | \
+ BIT_ULL(POWER_DOMAIN_AUX_A) | \
+ BIT_ULL(POWER_DOMAIN_GMBUS) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_F_LANES) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_AUX_D) | \
+ BIT_ULL(POWER_DOMAIN_AUX_F) | \
+ BIT_ULL(POWER_DOMAIN_AUDIO) | \
+ BIT_ULL(POWER_DOMAIN_VGA) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_A_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_B_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_C_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_D_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_A_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_A) | \
+ BIT_ULL(POWER_DOMAIN_AUX_IO_A) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_B_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_C_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_D_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_D) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_AUX_F_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_F) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DDI_F_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+#define CNL_DISPLAY_DC_OFF_POWER_DOMAINS ( \
+ CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
+ BIT_ULL(POWER_DOMAIN_GT_IRQ) | \
+ BIT_ULL(POWER_DOMAIN_MODESET) | \
+ BIT_ULL(POWER_DOMAIN_AUX_A) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+/*
+ * ICL PW_0/PG_0 domains (HW/DMC control):
+ * - PCI
+ * - clocks except port PLL
+ * - central power except FBC
+ * - shared functions except pipe interrupts, pipe MBUS, DBUF registers
+ * ICL PW_1/PG_1 domains (HW/DMC control):
+ * - DBUF function
+ * - PIPE_A and its planes, except VGA
+ * - transcoder EDP + PSR
+ * - transcoder DSI
+ * - DDI_A
+ * - FBC
+ */
+#define ICL_PW_4_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PIPE_C) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+ /* VDSC/joining */
+#define ICL_PW_3_POWER_DOMAINS ( \
+ ICL_PW_4_POWER_DOMAINS | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
+ BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_E_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_F_LANES) | \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO) | \
+ BIT_ULL(POWER_DOMAIN_AUX_B) | \
+ BIT_ULL(POWER_DOMAIN_AUX_C) | \
+ BIT_ULL(POWER_DOMAIN_AUX_D) | \
+ BIT_ULL(POWER_DOMAIN_AUX_E) | \
+ BIT_ULL(POWER_DOMAIN_AUX_F) | \
+ BIT_ULL(POWER_DOMAIN_AUX_TBT1) | \
+ BIT_ULL(POWER_DOMAIN_AUX_TBT2) | \
+ BIT_ULL(POWER_DOMAIN_AUX_TBT3) | \
+ BIT_ULL(POWER_DOMAIN_AUX_TBT4) | \
+ BIT_ULL(POWER_DOMAIN_VGA) | \
+ BIT_ULL(POWER_DOMAIN_AUDIO) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+ /*
+ * - transcoder WD
+ * - KVMR (HW control)
+ */
+#define ICL_PW_2_POWER_DOMAINS ( \
+ ICL_PW_3_POWER_DOMAINS | \
+ BIT_ULL(POWER_DOMAIN_TRANSCODER_EDP_VDSC) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+ /*
+ * - KVMR (HW control)
+ */
+#define ICL_DISPLAY_DC_OFF_POWER_DOMAINS ( \
+ ICL_PW_2_POWER_DOMAINS | \
+ BIT_ULL(POWER_DOMAIN_MODESET) | \
+ BIT_ULL(POWER_DOMAIN_AUX_A) | \
+ BIT_ULL(POWER_DOMAIN_INIT))
+
+#define ICL_DDI_IO_A_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO))
+#define ICL_DDI_IO_B_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO))
+#define ICL_DDI_IO_C_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO))
+#define ICL_DDI_IO_D_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO))
+#define ICL_DDI_IO_E_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO))
+#define ICL_DDI_IO_F_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO))
+
+#define ICL_AUX_A_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_IO_A) | \
+ BIT_ULL(POWER_DOMAIN_AUX_A))
+#define ICL_AUX_B_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_B))
+#define ICL_AUX_C_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_C))
+#define ICL_AUX_D_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_D))
+#define ICL_AUX_E_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_E))
+#define ICL_AUX_F_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_F))
+#define ICL_AUX_TBT1_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_TBT1))
+#define ICL_AUX_TBT2_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_TBT2))
+#define ICL_AUX_TBT3_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_TBT3))
+#define ICL_AUX_TBT4_IO_POWER_DOMAINS ( \
+ BIT_ULL(POWER_DOMAIN_AUX_TBT4))
+
+static const struct i915_power_well_ops i9xx_always_on_power_well_ops = {
+ .sync_hw = i9xx_power_well_sync_hw_noop,
+ .enable = i9xx_always_on_power_well_noop,
+ .disable = i9xx_always_on_power_well_noop,
+ .is_enabled = i9xx_always_on_power_well_enabled,
+};
+
+static const struct i915_power_well_ops chv_pipe_power_well_ops = {
+ .sync_hw = i9xx_power_well_sync_hw_noop,
+ .enable = chv_pipe_power_well_enable,
+ .disable = chv_pipe_power_well_disable,
+ .is_enabled = chv_pipe_power_well_enabled,
+};
+
+static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = {
+ .sync_hw = i9xx_power_well_sync_hw_noop,
+ .enable = chv_dpio_cmn_power_well_enable,
+ .disable = chv_dpio_cmn_power_well_disable,
+ .is_enabled = vlv_power_well_enabled,
+};
+
+static const struct i915_power_well_desc i9xx_always_on_power_well[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+};
+
+static const struct i915_power_well_ops i830_pipes_power_well_ops = {
+ .sync_hw = i830_pipes_power_well_sync_hw,
+ .enable = i830_pipes_power_well_enable,
+ .disable = i830_pipes_power_well_disable,
+ .is_enabled = i830_pipes_power_well_enabled,
+};
+
+static const struct i915_power_well_desc i830_power_wells[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "pipes",
+ .domains = I830_PIPES_POWER_DOMAINS,
+ .ops = &i830_pipes_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+};
+
+static const struct i915_power_well_ops hsw_power_well_ops = {
+ .sync_hw = hsw_power_well_sync_hw,
+ .enable = hsw_power_well_enable,
+ .disable = hsw_power_well_disable,
+ .is_enabled = hsw_power_well_enabled,
+};
+
+static const struct i915_power_well_ops gen9_dc_off_power_well_ops = {
+ .sync_hw = i9xx_power_well_sync_hw_noop,
+ .enable = gen9_dc_off_power_well_enable,
+ .disable = gen9_dc_off_power_well_disable,
+ .is_enabled = gen9_dc_off_power_well_enabled,
+};
+
+static const struct i915_power_well_ops bxt_dpio_cmn_power_well_ops = {
+ .sync_hw = i9xx_power_well_sync_hw_noop,
+ .enable = bxt_dpio_cmn_power_well_enable,
+ .disable = bxt_dpio_cmn_power_well_disable,
+ .is_enabled = bxt_dpio_cmn_power_well_enabled,
+};
+
+static const struct i915_power_well_regs hsw_power_well_regs = {
+ .bios = HSW_PWR_WELL_CTL1,
+ .driver = HSW_PWR_WELL_CTL2,
+ .kvmr = HSW_PWR_WELL_CTL3,
+ .debug = HSW_PWR_WELL_CTL4,
+};
+
+static const struct i915_power_well_desc hsw_power_wells[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "display",
+ .domains = HSW_DISPLAY_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = HSW_DISP_PW_GLOBAL,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = HSW_PW_CTL_IDX_GLOBAL,
+ .hsw.has_vga = true,
+ },
+ },
+};
+
+static const struct i915_power_well_desc bdw_power_wells[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "display",
+ .domains = BDW_DISPLAY_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = HSW_DISP_PW_GLOBAL,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = HSW_PW_CTL_IDX_GLOBAL,
+ .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
+ .hsw.has_vga = true,
+ },
+ },
+};
+
+static const struct i915_power_well_ops vlv_display_power_well_ops = {
+ .sync_hw = i9xx_power_well_sync_hw_noop,
+ .enable = vlv_display_power_well_enable,
+ .disable = vlv_display_power_well_disable,
+ .is_enabled = vlv_power_well_enabled,
+};
+
+static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = {
+ .sync_hw = i9xx_power_well_sync_hw_noop,
+ .enable = vlv_dpio_cmn_power_well_enable,
+ .disable = vlv_dpio_cmn_power_well_disable,
+ .is_enabled = vlv_power_well_enabled,
+};
+
+static const struct i915_power_well_ops vlv_dpio_power_well_ops = {
+ .sync_hw = i9xx_power_well_sync_hw_noop,
+ .enable = vlv_power_well_enable,
+ .disable = vlv_power_well_disable,
+ .is_enabled = vlv_power_well_enabled,
+};
+
+static const struct i915_power_well_desc vlv_power_wells[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "display",
+ .domains = VLV_DISPLAY_POWER_DOMAINS,
+ .ops = &vlv_display_power_well_ops,
+ .id = VLV_DISP_PW_DISP2D,
+ {
+ .vlv.idx = PUNIT_PWGT_IDX_DISP2D,
+ },
+ },
+ {
+ .name = "dpio-tx-b-01",
+ .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
+ VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
+ VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
+ VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
+ .ops = &vlv_dpio_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_B_LANES_01,
+ },
+ },
+ {
+ .name = "dpio-tx-b-23",
+ .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
+ VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
+ VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
+ VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
+ .ops = &vlv_dpio_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_B_LANES_23,
+ },
+ },
+ {
+ .name = "dpio-tx-c-01",
+ .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
+ VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
+ VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
+ VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
+ .ops = &vlv_dpio_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_C_LANES_01,
+ },
+ },
+ {
+ .name = "dpio-tx-c-23",
+ .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
+ VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
+ VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
+ VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
+ .ops = &vlv_dpio_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_C_LANES_23,
+ },
+ },
+ {
+ .name = "dpio-common",
+ .domains = VLV_DPIO_CMN_BC_POWER_DOMAINS,
+ .ops = &vlv_dpio_cmn_power_well_ops,
+ .id = VLV_DISP_PW_DPIO_CMN_BC,
+ {
+ .vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_BC,
+ },
+ },
+};
+
+static const struct i915_power_well_desc chv_power_wells[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "display",
+ /*
+ * Pipe A power well is the new disp2d well. Pipe B and C
+ * power wells don't actually exist. Pipe A power well is
+ * required for any pipe to work.
+ */
+ .domains = CHV_DISPLAY_POWER_DOMAINS,
+ .ops = &chv_pipe_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "dpio-common-bc",
+ .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS,
+ .ops = &chv_dpio_cmn_power_well_ops,
+ .id = VLV_DISP_PW_DPIO_CMN_BC,
+ {
+ .vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_BC,
+ },
+ },
+ {
+ .name = "dpio-common-d",
+ .domains = CHV_DPIO_CMN_D_POWER_DOMAINS,
+ .ops = &chv_dpio_cmn_power_well_ops,
+ .id = CHV_DISP_PW_DPIO_CMN_D,
+ {
+ .vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_D,
+ },
+ },
+};
+
+bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
+ enum i915_power_well_id power_well_id)
+{
+ struct i915_power_well *power_well;
+ bool ret;
+
+ power_well = lookup_power_well(dev_priv, power_well_id);
+ ret = power_well->desc->ops->is_enabled(dev_priv, power_well);
+
+ return ret;
+}
+
+static const struct i915_power_well_desc skl_power_wells[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "power well 1",
+ /* Handled by the DMC firmware */
+ .always_on = true,
+ .domains = 0,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_1,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_PW_1,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "MISC IO power well",
+ /* Handled by the DMC firmware */
+ .always_on = true,
+ .domains = 0,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_MISC_IO,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_MISC_IO,
+ },
+ },
+ {
+ .name = "DC off",
+ .domains = SKL_DISPLAY_DC_OFF_POWER_DOMAINS,
+ .ops = &gen9_dc_off_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "power well 2",
+ .domains = SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_2,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_PW_2,
+ .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
+ .hsw.has_vga = true,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "DDI A/E IO power well",
+ .domains = SKL_DISPLAY_DDI_IO_A_E_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_DDI_A_E,
+ },
+ },
+ {
+ .name = "DDI B IO power well",
+ .domains = SKL_DISPLAY_DDI_IO_B_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_DDI_B,
+ },
+ },
+ {
+ .name = "DDI C IO power well",
+ .domains = SKL_DISPLAY_DDI_IO_C_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_DDI_C,
+ },
+ },
+ {
+ .name = "DDI D IO power well",
+ .domains = SKL_DISPLAY_DDI_IO_D_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_DDI_D,
+ },
+ },
+};
+
+static const struct i915_power_well_desc bxt_power_wells[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "power well 1",
+ /* Handled by the DMC firmware */
+ .always_on = true,
+ .domains = 0,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_1,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_PW_1,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "DC off",
+ .domains = BXT_DISPLAY_DC_OFF_POWER_DOMAINS,
+ .ops = &gen9_dc_off_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "power well 2",
+ .domains = BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_2,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_PW_2,
+ .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
+ .hsw.has_vga = true,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "dpio-common-a",
+ .domains = BXT_DPIO_CMN_A_POWER_DOMAINS,
+ .ops = &bxt_dpio_cmn_power_well_ops,
+ .id = BXT_DISP_PW_DPIO_CMN_A,
+ {
+ .bxt.phy = DPIO_PHY1,
+ },
+ },
+ {
+ .name = "dpio-common-bc",
+ .domains = BXT_DPIO_CMN_BC_POWER_DOMAINS,
+ .ops = &bxt_dpio_cmn_power_well_ops,
+ .id = VLV_DISP_PW_DPIO_CMN_BC,
+ {
+ .bxt.phy = DPIO_PHY0,
+ },
+ },
+};
+
+static const struct i915_power_well_desc glk_power_wells[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "power well 1",
+ /* Handled by the DMC firmware */
+ .always_on = true,
+ .domains = 0,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_1,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_PW_1,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "DC off",
+ .domains = GLK_DISPLAY_DC_OFF_POWER_DOMAINS,
+ .ops = &gen9_dc_off_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "power well 2",
+ .domains = GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_2,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_PW_2,
+ .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
+ .hsw.has_vga = true,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "dpio-common-a",
+ .domains = GLK_DPIO_CMN_A_POWER_DOMAINS,
+ .ops = &bxt_dpio_cmn_power_well_ops,
+ .id = BXT_DISP_PW_DPIO_CMN_A,
+ {
+ .bxt.phy = DPIO_PHY1,
+ },
+ },
+ {
+ .name = "dpio-common-b",
+ .domains = GLK_DPIO_CMN_B_POWER_DOMAINS,
+ .ops = &bxt_dpio_cmn_power_well_ops,
+ .id = VLV_DISP_PW_DPIO_CMN_BC,
+ {
+ .bxt.phy = DPIO_PHY0,
+ },
+ },
+ {
+ .name = "dpio-common-c",
+ .domains = GLK_DPIO_CMN_C_POWER_DOMAINS,
+ .ops = &bxt_dpio_cmn_power_well_ops,
+ .id = GLK_DISP_PW_DPIO_CMN_C,
+ {
+ .bxt.phy = DPIO_PHY2,
+ },
+ },
+ {
+ .name = "AUX A",
+ .domains = GLK_DISPLAY_AUX_A_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = GLK_PW_CTL_IDX_AUX_A,
+ },
+ },
+ {
+ .name = "AUX B",
+ .domains = GLK_DISPLAY_AUX_B_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = GLK_PW_CTL_IDX_AUX_B,
+ },
+ },
+ {
+ .name = "AUX C",
+ .domains = GLK_DISPLAY_AUX_C_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = GLK_PW_CTL_IDX_AUX_C,
+ },
+ },
+ {
+ .name = "DDI A IO power well",
+ .domains = GLK_DISPLAY_DDI_IO_A_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = GLK_PW_CTL_IDX_DDI_A,
+ },
+ },
+ {
+ .name = "DDI B IO power well",
+ .domains = GLK_DISPLAY_DDI_IO_B_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_DDI_B,
+ },
+ },
+ {
+ .name = "DDI C IO power well",
+ .domains = GLK_DISPLAY_DDI_IO_C_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_DDI_C,
+ },
+ },
+};
+
+static const struct i915_power_well_desc cnl_power_wells[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "power well 1",
+ /* Handled by the DMC firmware */
+ .always_on = true,
+ .domains = 0,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_1,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_PW_1,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "AUX A",
+ .domains = CNL_DISPLAY_AUX_A_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = GLK_PW_CTL_IDX_AUX_A,
+ },
+ },
+ {
+ .name = "AUX B",
+ .domains = CNL_DISPLAY_AUX_B_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = GLK_PW_CTL_IDX_AUX_B,
+ },
+ },
+ {
+ .name = "AUX C",
+ .domains = CNL_DISPLAY_AUX_C_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = GLK_PW_CTL_IDX_AUX_C,
+ },
+ },
+ {
+ .name = "AUX D",
+ .domains = CNL_DISPLAY_AUX_D_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = CNL_PW_CTL_IDX_AUX_D,
+ },
+ },
+ {
+ .name = "DC off",
+ .domains = CNL_DISPLAY_DC_OFF_POWER_DOMAINS,
+ .ops = &gen9_dc_off_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "power well 2",
+ .domains = CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_2,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_PW_2,
+ .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
+ .hsw.has_vga = true,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "DDI A IO power well",
+ .domains = CNL_DISPLAY_DDI_A_IO_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = GLK_PW_CTL_IDX_DDI_A,
+ },
+ },
+ {
+ .name = "DDI B IO power well",
+ .domains = CNL_DISPLAY_DDI_B_IO_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_DDI_B,
+ },
+ },
+ {
+ .name = "DDI C IO power well",
+ .domains = CNL_DISPLAY_DDI_C_IO_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_DDI_C,
+ },
+ },
+ {
+ .name = "DDI D IO power well",
+ .domains = CNL_DISPLAY_DDI_D_IO_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = SKL_PW_CTL_IDX_DDI_D,
+ },
+ },
+ {
+ .name = "DDI F IO power well",
+ .domains = CNL_DISPLAY_DDI_F_IO_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = CNL_PW_CTL_IDX_DDI_F,
+ },
+ },
+ {
+ .name = "AUX F",
+ .domains = CNL_DISPLAY_AUX_F_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = CNL_PW_CTL_IDX_AUX_F,
+ },
+ },
+};
+
+static const struct i915_power_well_ops icl_combo_phy_aux_power_well_ops = {
+ .sync_hw = hsw_power_well_sync_hw,
+ .enable = icl_combo_phy_aux_power_well_enable,
+ .disable = icl_combo_phy_aux_power_well_disable,
+ .is_enabled = hsw_power_well_enabled,
+};
+
+static const struct i915_power_well_ops icl_tc_phy_aux_power_well_ops = {
+ .sync_hw = hsw_power_well_sync_hw,
+ .enable = icl_tc_phy_aux_power_well_enable,
+ .disable = hsw_power_well_disable,
+ .is_enabled = hsw_power_well_enabled,
+};
+
+static const struct i915_power_well_regs icl_aux_power_well_regs = {
+ .bios = ICL_PWR_WELL_CTL_AUX1,
+ .driver = ICL_PWR_WELL_CTL_AUX2,
+ .debug = ICL_PWR_WELL_CTL_AUX4,
+};
+
+static const struct i915_power_well_regs icl_ddi_power_well_regs = {
+ .bios = ICL_PWR_WELL_CTL_DDI1,
+ .driver = ICL_PWR_WELL_CTL_DDI2,
+ .debug = ICL_PWR_WELL_CTL_DDI4,
+};
+
+static const struct i915_power_well_desc icl_power_wells[] = {
+ {
+ .name = "always-on",
+ .always_on = true,
+ .domains = POWER_DOMAIN_MASK,
+ .ops = &i9xx_always_on_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "power well 1",
+ /* Handled by the DMC firmware */
+ .always_on = true,
+ .domains = 0,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_1,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_PW_1,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "DC off",
+ .domains = ICL_DISPLAY_DC_OFF_POWER_DOMAINS,
+ .ops = &gen9_dc_off_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ },
+ {
+ .name = "power well 2",
+ .domains = ICL_PW_2_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = SKL_DISP_PW_2,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_PW_2,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "power well 3",
+ .domains = ICL_PW_3_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_PW_3,
+ .hsw.irq_pipe_mask = BIT(PIPE_B),
+ .hsw.has_vga = true,
+ .hsw.has_fuses = true,
+ },
+ },
+ {
+ .name = "DDI A IO",
+ .domains = ICL_DDI_IO_A_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_ddi_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_DDI_A,
+ },
+ },
+ {
+ .name = "DDI B IO",
+ .domains = ICL_DDI_IO_B_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_ddi_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_DDI_B,
+ },
+ },
+ {
+ .name = "DDI C IO",
+ .domains = ICL_DDI_IO_C_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_ddi_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_DDI_C,
+ },
+ },
+ {
+ .name = "DDI D IO",
+ .domains = ICL_DDI_IO_D_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_ddi_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_DDI_D,
+ },
+ },
+ {
+ .name = "DDI E IO",
+ .domains = ICL_DDI_IO_E_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_ddi_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_DDI_E,
+ },
+ },
+ {
+ .name = "DDI F IO",
+ .domains = ICL_DDI_IO_F_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_ddi_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_DDI_F,
+ },
+ },
+ {
+ .name = "AUX A",
+ .domains = ICL_AUX_A_IO_POWER_DOMAINS,
+ .ops = &icl_combo_phy_aux_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_aux_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_AUX_A,
+ },
+ },
+ {
+ .name = "AUX B",
+ .domains = ICL_AUX_B_IO_POWER_DOMAINS,
+ .ops = &icl_combo_phy_aux_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_aux_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_AUX_B,
+ },
+ },
+ {
+ .name = "AUX C",
+ .domains = ICL_AUX_C_IO_POWER_DOMAINS,
+ .ops = &icl_tc_phy_aux_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_aux_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_AUX_C,
+ .hsw.is_tc_tbt = false,
+ },
+ },
+ {
+ .name = "AUX D",
+ .domains = ICL_AUX_D_IO_POWER_DOMAINS,
+ .ops = &icl_tc_phy_aux_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_aux_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_AUX_D,
+ .hsw.is_tc_tbt = false,
+ },
+ },
+ {
+ .name = "AUX E",
+ .domains = ICL_AUX_E_IO_POWER_DOMAINS,
+ .ops = &icl_tc_phy_aux_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_aux_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_AUX_E,
+ .hsw.is_tc_tbt = false,
+ },
+ },
+ {
+ .name = "AUX F",
+ .domains = ICL_AUX_F_IO_POWER_DOMAINS,
+ .ops = &icl_tc_phy_aux_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_aux_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_AUX_F,
+ .hsw.is_tc_tbt = false,
+ },
+ },
+ {
+ .name = "AUX TBT1",
+ .domains = ICL_AUX_TBT1_IO_POWER_DOMAINS,
+ .ops = &icl_tc_phy_aux_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_aux_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT1,
+ .hsw.is_tc_tbt = true,
+ },
+ },
+ {
+ .name = "AUX TBT2",
+ .domains = ICL_AUX_TBT2_IO_POWER_DOMAINS,
+ .ops = &icl_tc_phy_aux_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_aux_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT2,
+ .hsw.is_tc_tbt = true,
+ },
+ },
+ {
+ .name = "AUX TBT3",
+ .domains = ICL_AUX_TBT3_IO_POWER_DOMAINS,
+ .ops = &icl_tc_phy_aux_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_aux_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT3,
+ .hsw.is_tc_tbt = true,
+ },
+ },
+ {
+ .name = "AUX TBT4",
+ .domains = ICL_AUX_TBT4_IO_POWER_DOMAINS,
+ .ops = &icl_tc_phy_aux_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &icl_aux_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT4,
+ .hsw.is_tc_tbt = true,
+ },
+ },
+ {
+ .name = "power well 4",
+ .domains = ICL_PW_4_POWER_DOMAINS,
+ .ops = &hsw_power_well_ops,
+ .id = DISP_PW_ID_NONE,
+ {
+ .hsw.regs = &hsw_power_well_regs,
+ .hsw.idx = ICL_PW_CTL_IDX_PW_4,
+ .hsw.has_fuses = true,
+ .hsw.irq_pipe_mask = BIT(PIPE_C),
+ },
+ },
+};
+
+static int
+sanitize_disable_power_well_option(const struct drm_i915_private *dev_priv,
+ int disable_power_well)
+{
+ if (disable_power_well >= 0)
+ return !!disable_power_well;
+
+ return 1;
+}
+
+static u32 get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
+ int enable_dc)
+{
+ u32 mask;
+ int requested_dc;
+ int max_dc;
+
+ if (INTEL_GEN(dev_priv) >= 11) {
+ max_dc = 2;
+ /*
+ * DC9 has a separate HW flow from the rest of the DC states,
+ * not depending on the DMC firmware. It's needed by system
+ * suspend/resume, so allow it unconditionally.
+ */
+ mask = DC_STATE_EN_DC9;
+ } else if (IS_GEN(dev_priv, 10) || IS_GEN9_BC(dev_priv)) {
+ max_dc = 2;
+ mask = 0;
+ } else if (IS_GEN9_LP(dev_priv)) {
+ max_dc = 1;
+ mask = DC_STATE_EN_DC9;
+ } else {
+ max_dc = 0;
+ mask = 0;
+ }
+
+ if (!i915_modparams.disable_power_well)
+ max_dc = 0;
+
+ if (enable_dc >= 0 && enable_dc <= max_dc) {
+ requested_dc = enable_dc;
+ } else if (enable_dc == -1) {
+ requested_dc = max_dc;
+ } else if (enable_dc > max_dc && enable_dc <= 2) {
+ DRM_DEBUG_KMS("Adjusting requested max DC state (%d->%d)\n",
+ enable_dc, max_dc);
+ requested_dc = max_dc;
+ } else {
+ DRM_ERROR("Unexpected value for enable_dc (%d)\n", enable_dc);
+ requested_dc = max_dc;
+ }
+
+ if (requested_dc > 1)
+ mask |= DC_STATE_EN_UPTO_DC6;
+ if (requested_dc > 0)
+ mask |= DC_STATE_EN_UPTO_DC5;
+
+ DRM_DEBUG_KMS("Allowed DC state mask %02x\n", mask);
+
+ return mask;
+}
+
+static int
+__set_power_wells(struct i915_power_domains *power_domains,
+ const struct i915_power_well_desc *power_well_descs,
+ int power_well_count)
+{
+ u64 power_well_ids = 0;
+ int i;
+
+ power_domains->power_well_count = power_well_count;
+ power_domains->power_wells =
+ kcalloc(power_well_count,
+ sizeof(*power_domains->power_wells),
+ GFP_KERNEL);
+ if (!power_domains->power_wells)
+ return -ENOMEM;
+
+ for (i = 0; i < power_well_count; i++) {
+ enum i915_power_well_id id = power_well_descs[i].id;
+
+ power_domains->power_wells[i].desc = &power_well_descs[i];
+
+ if (id == DISP_PW_ID_NONE)
+ continue;
+
+ WARN_ON(id >= sizeof(power_well_ids) * 8);
+ WARN_ON(power_well_ids & BIT_ULL(id));
+ power_well_ids |= BIT_ULL(id);
+ }
+
+ return 0;
+}
+
+#define set_power_wells(power_domains, __power_well_descs) \
+ __set_power_wells(power_domains, __power_well_descs, \
+ ARRAY_SIZE(__power_well_descs))
+
+/**
+ * intel_power_domains_init - initializes the power domain structures
+ * @dev_priv: i915 device instance
+ *
+ * Initializes the power domain structures for @dev_priv depending upon the
+ * supported platform.
+ */
+int intel_power_domains_init(struct drm_i915_private *dev_priv)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ int err;
+
+ i915_modparams.disable_power_well =
+ sanitize_disable_power_well_option(dev_priv,
+ i915_modparams.disable_power_well);
+ dev_priv->csr.allowed_dc_mask =
+ get_allowed_dc_mask(dev_priv, i915_modparams.enable_dc);
+
+ BUILD_BUG_ON(POWER_DOMAIN_NUM > 64);
+
+ mutex_init(&power_domains->lock);
+
+ INIT_DELAYED_WORK(&power_domains->async_put_work,
+ intel_display_power_put_async_work);
+
+ /*
+ * The enabling order will be from lower to higher indexed wells,
+ * the disabling order is reversed.
+ */
+ if (IS_GEN(dev_priv, 11)) {
+ err = set_power_wells(power_domains, icl_power_wells);
+ } else if (IS_CANNONLAKE(dev_priv)) {
+ err = set_power_wells(power_domains, cnl_power_wells);
+
+ /*
+ * DDI and Aux IO are getting enabled for all ports
+ * regardless the presence or use. So, in order to avoid
+ * timeouts, lets remove them from the list
+ * for the SKUs without port F.
+ */
+ if (!IS_CNL_WITH_PORT_F(dev_priv))
+ power_domains->power_well_count -= 2;
+ } else if (IS_GEMINILAKE(dev_priv)) {
+ err = set_power_wells(power_domains, glk_power_wells);
+ } else if (IS_BROXTON(dev_priv)) {
+ err = set_power_wells(power_domains, bxt_power_wells);
+ } else if (IS_GEN9_BC(dev_priv)) {
+ err = set_power_wells(power_domains, skl_power_wells);
+ } else if (IS_CHERRYVIEW(dev_priv)) {
+ err = set_power_wells(power_domains, chv_power_wells);
+ } else if (IS_BROADWELL(dev_priv)) {
+ err = set_power_wells(power_domains, bdw_power_wells);
+ } else if (IS_HASWELL(dev_priv)) {
+ err = set_power_wells(power_domains, hsw_power_wells);
+ } else if (IS_VALLEYVIEW(dev_priv)) {
+ err = set_power_wells(power_domains, vlv_power_wells);
+ } else if (IS_I830(dev_priv)) {
+ err = set_power_wells(power_domains, i830_power_wells);
+ } else {
+ err = set_power_wells(power_domains, i9xx_always_on_power_well);
+ }
+
+ return err;
+}
+
+/**
+ * intel_power_domains_cleanup - clean up power domains resources
+ * @dev_priv: i915 device instance
+ *
+ * Release any resources acquired by intel_power_domains_init()
+ */
+void intel_power_domains_cleanup(struct drm_i915_private *dev_priv)
+{
+ kfree(dev_priv->power_domains.power_wells);
+}
+
+static void intel_power_domains_sync_hw(struct drm_i915_private *dev_priv)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ struct i915_power_well *power_well;
+
+ mutex_lock(&power_domains->lock);
+ for_each_power_well(dev_priv, power_well) {
+ power_well->desc->ops->sync_hw(dev_priv, power_well);
+ power_well->hw_enabled =
+ power_well->desc->ops->is_enabled(dev_priv, power_well);
+ }
+ mutex_unlock(&power_domains->lock);
+}
+
+static inline
+bool intel_dbuf_slice_set(struct drm_i915_private *dev_priv,
+ i915_reg_t reg, bool enable)
+{
+ u32 val, status;
+
+ val = I915_READ(reg);
+ val = enable ? (val | DBUF_POWER_REQUEST) : (val & ~DBUF_POWER_REQUEST);
+ I915_WRITE(reg, val);
+ POSTING_READ(reg);
+ udelay(10);
+
+ status = I915_READ(reg) & DBUF_POWER_STATE;
+ if ((enable && !status) || (!enable && status)) {
+ DRM_ERROR("DBus power %s timeout!\n",
+ enable ? "enable" : "disable");
+ return false;
+ }
+ return true;
+}
+
+static void gen9_dbuf_enable(struct drm_i915_private *dev_priv)
+{
+ intel_dbuf_slice_set(dev_priv, DBUF_CTL, true);
+}
+
+static void gen9_dbuf_disable(struct drm_i915_private *dev_priv)
+{
+ intel_dbuf_slice_set(dev_priv, DBUF_CTL, false);
+}
+
+static u8 intel_dbuf_max_slices(struct drm_i915_private *dev_priv)
+{
+ if (INTEL_GEN(dev_priv) < 11)
+ return 1;
+ return 2;
+}
+
+void icl_dbuf_slices_update(struct drm_i915_private *dev_priv,
+ u8 req_slices)
+{
+ const u8 hw_enabled_slices = dev_priv->wm.skl_hw.ddb.enabled_slices;
+ bool ret;
+
+ if (req_slices > intel_dbuf_max_slices(dev_priv)) {
+ DRM_ERROR("Invalid number of dbuf slices requested\n");
+ return;
+ }
+
+ if (req_slices == hw_enabled_slices || req_slices == 0)
+ return;
+
+ if (req_slices > hw_enabled_slices)
+ ret = intel_dbuf_slice_set(dev_priv, DBUF_CTL_S2, true);
+ else
+ ret = intel_dbuf_slice_set(dev_priv, DBUF_CTL_S2, false);
+
+ if (ret)
+ dev_priv->wm.skl_hw.ddb.enabled_slices = req_slices;
+}
+
+static void icl_dbuf_enable(struct drm_i915_private *dev_priv)
+{
+ I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) | DBUF_POWER_REQUEST);
+ I915_WRITE(DBUF_CTL_S2, I915_READ(DBUF_CTL_S2) | DBUF_POWER_REQUEST);
+ POSTING_READ(DBUF_CTL_S2);
+
+ udelay(10);
+
+ if (!(I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE) ||
+ !(I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE))
+ DRM_ERROR("DBuf power enable timeout\n");
+ else
+ /*
+ * FIXME: for now pretend that we only have 1 slice, see
+ * intel_enabled_dbuf_slices_num().
+ */
+ dev_priv->wm.skl_hw.ddb.enabled_slices = 1;
+}
+
+static void icl_dbuf_disable(struct drm_i915_private *dev_priv)
+{
+ I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) & ~DBUF_POWER_REQUEST);
+ I915_WRITE(DBUF_CTL_S2, I915_READ(DBUF_CTL_S2) & ~DBUF_POWER_REQUEST);
+ POSTING_READ(DBUF_CTL_S2);
+
+ udelay(10);
+
+ if ((I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE) ||
+ (I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE))
+ DRM_ERROR("DBuf power disable timeout!\n");
+ else
+ /*
+ * FIXME: for now pretend that the first slice is always
+ * enabled, see intel_enabled_dbuf_slices_num().
+ */
+ dev_priv->wm.skl_hw.ddb.enabled_slices = 1;
+}
+
+static void icl_mbus_init(struct drm_i915_private *dev_priv)
+{
+ u32 val;
+
+ val = MBUS_ABOX_BT_CREDIT_POOL1(16) |
+ MBUS_ABOX_BT_CREDIT_POOL2(16) |
+ MBUS_ABOX_B_CREDIT(1) |
+ MBUS_ABOX_BW_CREDIT(1);
+
+ I915_WRITE(MBUS_ABOX_CTL, val);
+}
+
+static void hsw_assert_cdclk(struct drm_i915_private *dev_priv)
+{
+ u32 val = I915_READ(LCPLL_CTL);
+
+ /*
+ * The LCPLL register should be turned on by the BIOS. For now
+ * let's just check its state and print errors in case
+ * something is wrong. Don't even try to turn it on.
+ */
+
+ if (val & LCPLL_CD_SOURCE_FCLK)
+ DRM_ERROR("CDCLK source is not LCPLL\n");
+
+ if (val & LCPLL_PLL_DISABLE)
+ DRM_ERROR("LCPLL is disabled\n");
+}
+
+static void assert_can_disable_lcpll(struct drm_i915_private *dev_priv)
+{
+ struct drm_device *dev = &dev_priv->drm;
+ struct intel_crtc *crtc;
+
+ for_each_intel_crtc(dev, crtc)
+ I915_STATE_WARN(crtc->active, "CRTC for pipe %c enabled\n",
+ pipe_name(crtc->pipe));
+
+ I915_STATE_WARN(I915_READ(HSW_PWR_WELL_CTL2),
+ "Display power well on\n");
+ I915_STATE_WARN(I915_READ(SPLL_CTL) & SPLL_PLL_ENABLE,
+ "SPLL enabled\n");
+ I915_STATE_WARN(I915_READ(WRPLL_CTL(0)) & WRPLL_PLL_ENABLE,
+ "WRPLL1 enabled\n");
+ I915_STATE_WARN(I915_READ(WRPLL_CTL(1)) & WRPLL_PLL_ENABLE,
+ "WRPLL2 enabled\n");
+ I915_STATE_WARN(I915_READ(PP_STATUS(0)) & PP_ON,
+ "Panel power on\n");
+ I915_STATE_WARN(I915_READ(BLC_PWM_CPU_CTL2) & BLM_PWM_ENABLE,
+ "CPU PWM1 enabled\n");
+ if (IS_HASWELL(dev_priv))
+ I915_STATE_WARN(I915_READ(HSW_BLC_PWM2_CTL) & BLM_PWM_ENABLE,
+ "CPU PWM2 enabled\n");
+ I915_STATE_WARN(I915_READ(BLC_PWM_PCH_CTL1) & BLM_PCH_PWM_ENABLE,
+ "PCH PWM1 enabled\n");
+ I915_STATE_WARN(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,
+ "Utility pin enabled\n");
+ I915_STATE_WARN(I915_READ(PCH_GTC_CTL) & PCH_GTC_ENABLE,
+ "PCH GTC enabled\n");
+
+ /*
+ * In theory we can still leave IRQs enabled, as long as only the HPD
+ * interrupts remain enabled. We used to check for that, but since it's
+ * gen-specific and since we only disable LCPLL after we fully disable
+ * the interrupts, the check below should be enough.
+ */
+ I915_STATE_WARN(intel_irqs_enabled(dev_priv), "IRQs enabled\n");
+}
+
+static u32 hsw_read_dcomp(struct drm_i915_private *dev_priv)
+{
+ if (IS_HASWELL(dev_priv))
+ return I915_READ(D_COMP_HSW);
+ else
+ return I915_READ(D_COMP_BDW);
+}
+
+static void hsw_write_dcomp(struct drm_i915_private *dev_priv, u32 val)
+{
+ if (IS_HASWELL(dev_priv)) {
+ if (sandybridge_pcode_write(dev_priv,
+ GEN6_PCODE_WRITE_D_COMP, val))
+ DRM_DEBUG_KMS("Failed to write to D_COMP\n");
+ } else {
+ I915_WRITE(D_COMP_BDW, val);
+ POSTING_READ(D_COMP_BDW);
+ }
+}
+
+/*
+ * This function implements pieces of two sequences from BSpec:
+ * - Sequence for display software to disable LCPLL
+ * - Sequence for display software to allow package C8+
+ * The steps implemented here are just the steps that actually touch the LCPLL
+ * register. Callers should take care of disabling all the display engine
+ * functions, doing the mode unset, fixing interrupts, etc.
+ */
+static void hsw_disable_lcpll(struct drm_i915_private *dev_priv,
+ bool switch_to_fclk, bool allow_power_down)
+{
+ u32 val;
+
+ assert_can_disable_lcpll(dev_priv);
+
+ val = I915_READ(LCPLL_CTL);
+
+ if (switch_to_fclk) {
+ val |= LCPLL_CD_SOURCE_FCLK;
+ I915_WRITE(LCPLL_CTL, val);
+
+ if (wait_for_us(I915_READ(LCPLL_CTL) &
+ LCPLL_CD_SOURCE_FCLK_DONE, 1))
+ DRM_ERROR("Switching to FCLK failed\n");
+
+ val = I915_READ(LCPLL_CTL);
+ }
+
+ val |= LCPLL_PLL_DISABLE;
+ I915_WRITE(LCPLL_CTL, val);
+ POSTING_READ(LCPLL_CTL);
+
+ if (intel_wait_for_register(&dev_priv->uncore, LCPLL_CTL,
+ LCPLL_PLL_LOCK, 0, 1))
+ DRM_ERROR("LCPLL still locked\n");
+
+ val = hsw_read_dcomp(dev_priv);
+ val |= D_COMP_COMP_DISABLE;
+ hsw_write_dcomp(dev_priv, val);
+ ndelay(100);
+
+ if (wait_for((hsw_read_dcomp(dev_priv) &
+ D_COMP_RCOMP_IN_PROGRESS) == 0, 1))
+ DRM_ERROR("D_COMP RCOMP still in progress\n");
+
+ if (allow_power_down) {
+ val = I915_READ(LCPLL_CTL);
+ val |= LCPLL_POWER_DOWN_ALLOW;
+ I915_WRITE(LCPLL_CTL, val);
+ POSTING_READ(LCPLL_CTL);
+ }
+}
+
+/*
+ * Fully restores LCPLL, disallowing power down and switching back to LCPLL
+ * source.
+ */
+static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
+{
+ u32 val;
+
+ val = I915_READ(LCPLL_CTL);
+
+ if ((val & (LCPLL_PLL_LOCK | LCPLL_PLL_DISABLE | LCPLL_CD_SOURCE_FCLK |
+ LCPLL_POWER_DOWN_ALLOW)) == LCPLL_PLL_LOCK)
+ return;
+
+ /*
+ * Make sure we're not on PC8 state before disabling PC8, otherwise
+ * we'll hang the machine. To prevent PC8 state, just enable force_wake.
+ */
+ intel_uncore_forcewake_get(&dev_priv->uncore, FORCEWAKE_ALL);
+
+ if (val & LCPLL_POWER_DOWN_ALLOW) {
+ val &= ~LCPLL_POWER_DOWN_ALLOW;
+ I915_WRITE(LCPLL_CTL, val);
+ POSTING_READ(LCPLL_CTL);
+ }
+
+ val = hsw_read_dcomp(dev_priv);
+ val |= D_COMP_COMP_FORCE;
+ val &= ~D_COMP_COMP_DISABLE;
+ hsw_write_dcomp(dev_priv, val);
+
+ val = I915_READ(LCPLL_CTL);
+ val &= ~LCPLL_PLL_DISABLE;
+ I915_WRITE(LCPLL_CTL, val);
+
+ if (intel_wait_for_register(&dev_priv->uncore, LCPLL_CTL,
+ LCPLL_PLL_LOCK, LCPLL_PLL_LOCK, 5))
+ DRM_ERROR("LCPLL not locked yet\n");
+
+ if (val & LCPLL_CD_SOURCE_FCLK) {
+ val = I915_READ(LCPLL_CTL);
+ val &= ~LCPLL_CD_SOURCE_FCLK;
+ I915_WRITE(LCPLL_CTL, val);
+
+ if (wait_for_us((I915_READ(LCPLL_CTL) &
+ LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
+ DRM_ERROR("Switching back to LCPLL failed\n");
+ }
+
+ intel_uncore_forcewake_put(&dev_priv->uncore, FORCEWAKE_ALL);
+
+ intel_update_cdclk(dev_priv);
+ intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK");
+}
+
+/*
+ * Package states C8 and deeper are really deep PC states that can only be
+ * reached when all the devices on the system allow it, so even if the graphics
+ * device allows PC8+, it doesn't mean the system will actually get to these
+ * states. Our driver only allows PC8+ when going into runtime PM.
+ *
+ * The requirements for PC8+ are that all the outputs are disabled, the power
+ * well is disabled and most interrupts are disabled, and these are also
+ * requirements for runtime PM. When these conditions are met, we manually do
+ * the other conditions: disable the interrupts, clocks and switch LCPLL refclk
+ * to Fclk. If we're in PC8+ and we get an non-hotplug interrupt, we can hard
+ * hang the machine.
+ *
+ * When we really reach PC8 or deeper states (not just when we allow it) we lose
+ * the state of some registers, so when we come back from PC8+ we need to
+ * restore this state. We don't get into PC8+ if we're not in RC6, so we don't
+ * need to take care of the registers kept by RC6. Notice that this happens even
+ * if we don't put the device in PCI D3 state (which is what currently happens
+ * because of the runtime PM support).
+ *
+ * For more, read "Display Sequences for Package C8" on the hardware
+ * documentation.
+ */
+void hsw_enable_pc8(struct drm_i915_private *dev_priv)
+{
+ u32 val;
+
+ DRM_DEBUG_KMS("Enabling package C8+\n");
+
+ if (HAS_PCH_LPT_LP(dev_priv)) {
+ val = I915_READ(SOUTH_DSPCLK_GATE_D);
+ val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
+ I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
+ }
+
+ lpt_disable_clkout_dp(dev_priv);
+ hsw_disable_lcpll(dev_priv, true, true);
+}
+
+void hsw_disable_pc8(struct drm_i915_private *dev_priv)
+{
+ u32 val;
+
+ DRM_DEBUG_KMS("Disabling package C8+\n");
+
+ hsw_restore_lcpll(dev_priv);
+ intel_init_pch_refclk(dev_priv);
+
+ if (HAS_PCH_LPT_LP(dev_priv)) {
+ val = I915_READ(SOUTH_DSPCLK_GATE_D);
+ val |= PCH_LP_PARTITION_LEVEL_DISABLE;
+ I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
+ }
+}
+
+static void intel_pch_reset_handshake(struct drm_i915_private *dev_priv,
+ bool enable)
+{
+ i915_reg_t reg;
+ u32 reset_bits, val;
+
+ if (IS_IVYBRIDGE(dev_priv)) {
+ reg = GEN7_MSG_CTL;
+ reset_bits = WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK;
+ } else {
+ reg = HSW_NDE_RSTWRN_OPT;
+ reset_bits = RESET_PCH_HANDSHAKE_ENABLE;
+ }
+
+ val = I915_READ(reg);
+
+ if (enable)
+ val |= reset_bits;
+ else
+ val &= ~reset_bits;
+
+ I915_WRITE(reg, val);
+}
+
+static void skl_display_core_init(struct drm_i915_private *dev_priv,
+ bool resume)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ struct i915_power_well *well;
+
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+ /* enable PCH reset handshake */
+ intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
+
+ /* enable PG1 and Misc I/O */
+ mutex_lock(&power_domains->lock);
+
+ well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+ intel_power_well_enable(dev_priv, well);
+
+ well = lookup_power_well(dev_priv, SKL_DISP_PW_MISC_IO);
+ intel_power_well_enable(dev_priv, well);
+
+ mutex_unlock(&power_domains->lock);
+
+ intel_cdclk_init(dev_priv);
+
+ gen9_dbuf_enable(dev_priv);
+
+ if (resume && dev_priv->csr.dmc_payload)
+ intel_csr_load_program(dev_priv);
+}
+
+static void skl_display_core_uninit(struct drm_i915_private *dev_priv)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ struct i915_power_well *well;
+
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+ gen9_dbuf_disable(dev_priv);
+
+ intel_cdclk_uninit(dev_priv);
+
+ /* The spec doesn't call for removing the reset handshake flag */
+ /* disable PG1 and Misc I/O */
+
+ mutex_lock(&power_domains->lock);
+
+ /*
+ * BSpec says to keep the MISC IO power well enabled here, only
+ * remove our request for power well 1.
+ * Note that even though the driver's request is removed power well 1
+ * may stay enabled after this due to DMC's own request on it.
+ */
+ well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+ intel_power_well_disable(dev_priv, well);
+
+ mutex_unlock(&power_domains->lock);
+
+ usleep_range(10, 30); /* 10 us delay per Bspec */
+}
+
+void bxt_display_core_init(struct drm_i915_private *dev_priv,
+ bool resume)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ struct i915_power_well *well;
+
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+ /*
+ * NDE_RSTWRN_OPT RST PCH Handshake En must always be 0b on BXT
+ * or else the reset will hang because there is no PCH to respond.
+ * Move the handshake programming to initialization sequence.
+ * Previously was left up to BIOS.
+ */
+ intel_pch_reset_handshake(dev_priv, false);
+
+ /* Enable PG1 */
+ mutex_lock(&power_domains->lock);
+
+ well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+ intel_power_well_enable(dev_priv, well);
+
+ mutex_unlock(&power_domains->lock);
+
+ intel_cdclk_init(dev_priv);
+
+ gen9_dbuf_enable(dev_priv);
+
+ if (resume && dev_priv->csr.dmc_payload)
+ intel_csr_load_program(dev_priv);
+}
+
+void bxt_display_core_uninit(struct drm_i915_private *dev_priv)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ struct i915_power_well *well;
+
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+ gen9_dbuf_disable(dev_priv);
+
+ intel_cdclk_uninit(dev_priv);
+
+ /* The spec doesn't call for removing the reset handshake flag */
+
+ /*
+ * Disable PW1 (PG1).
+ * Note that even though the driver's request is removed power well 1
+ * may stay enabled after this due to DMC's own request on it.
+ */
+ mutex_lock(&power_domains->lock);
+
+ well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+ intel_power_well_disable(dev_priv, well);
+
+ mutex_unlock(&power_domains->lock);
+
+ usleep_range(10, 30); /* 10 us delay per Bspec */
+}
+
+static void cnl_display_core_init(struct drm_i915_private *dev_priv, bool resume)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ struct i915_power_well *well;
+
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+ /* 1. Enable PCH Reset Handshake */
+ intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
+
+ /* 2-3. */
+ intel_combo_phy_init(dev_priv);
+
+ /*
+ * 4. Enable Power Well 1 (PG1).
+ * The AUX IO power wells will be enabled on demand.
+ */
+ mutex_lock(&power_domains->lock);
+ well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+ intel_power_well_enable(dev_priv, well);
+ mutex_unlock(&power_domains->lock);
+
+ /* 5. Enable CD clock */
+ intel_cdclk_init(dev_priv);
+
+ /* 6. Enable DBUF */
+ gen9_dbuf_enable(dev_priv);
+
+ if (resume && dev_priv->csr.dmc_payload)
+ intel_csr_load_program(dev_priv);
+}
+
+static void cnl_display_core_uninit(struct drm_i915_private *dev_priv)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ struct i915_power_well *well;
+
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+ /* 1. Disable all display engine functions -> aready done */
+
+ /* 2. Disable DBUF */
+ gen9_dbuf_disable(dev_priv);
+
+ /* 3. Disable CD clock */
+ intel_cdclk_uninit(dev_priv);
+
+ /*
+ * 4. Disable Power Well 1 (PG1).
+ * The AUX IO power wells are toggled on demand, so they are already
+ * disabled at this point.
+ */
+ mutex_lock(&power_domains->lock);
+ well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+ intel_power_well_disable(dev_priv, well);
+ mutex_unlock(&power_domains->lock);
+
+ usleep_range(10, 30); /* 10 us delay per Bspec */
+
+ /* 5. */
+ intel_combo_phy_uninit(dev_priv);
+}
+
+void icl_display_core_init(struct drm_i915_private *dev_priv,
+ bool resume)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ struct i915_power_well *well;
+
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+ /* 1. Enable PCH reset handshake. */
+ intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
+
+ /* 2. Initialize all combo phys */
+ intel_combo_phy_init(dev_priv);
+
+ /*
+ * 3. Enable Power Well 1 (PG1).
+ * The AUX IO power wells will be enabled on demand.
+ */
+ mutex_lock(&power_domains->lock);
+ well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+ intel_power_well_enable(dev_priv, well);
+ mutex_unlock(&power_domains->lock);
+
+ /* 4. Enable CDCLK. */
+ intel_cdclk_init(dev_priv);
+
+ /* 5. Enable DBUF. */
+ icl_dbuf_enable(dev_priv);
+
+ /* 6. Setup MBUS. */
+ icl_mbus_init(dev_priv);
+
+ if (resume && dev_priv->csr.dmc_payload)
+ intel_csr_load_program(dev_priv);
+}
+
+void icl_display_core_uninit(struct drm_i915_private *dev_priv)
+{
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+ struct i915_power_well *well;
+
+ gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+
+ /* 1. Disable all display engine functions -> aready done */
+
+ /* 2. Disable DBUF */
+ icl_dbuf_disable(dev_priv);
+
+ /* 3. Disable CD clock */
+ intel_cdclk_uninit(dev_priv);
+
+ /*
+ * 4. Disable Power Well 1 (PG1).
+ * The AUX IO power wells are toggled on demand, so they are already
+ * disabled at this point.
+ */
+ mutex_lock(&power_domains->lock);
+ well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
+ intel_power_well_disable(dev_priv, well);
+ mutex_unlock(&power_domains->lock);
+
+ /* 5. */
+ intel_combo_phy_uninit(dev_priv);
+}
+
+static void chv_phy_control_init(struct drm_i915_private *dev_priv)
+{
+ struct i915_power_well *cmn_bc =
+ lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
+ struct i915_power_well *cmn_d =
+ lookup_power_well(dev_priv, CHV_DISP_PW_DPIO_CMN_D);
+
+ /*
+ * DISPLAY_PHY_CONTROL can get corrupted if read. As a
+ * workaround never ever read DISPLAY_PHY_CONTROL, and
+ * instead maintain a shadow copy ourselves. Use the actual
+ * power well state and lane status to reconstruct the
+ * expected initial value.
+ */
+ dev_priv->chv_phy_control =
+ PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) |
+ PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) |
+ PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH0) |
+ PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH1) |
+ PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY1, DPIO_CH0);
+
+ /*
+ * If all lanes are disabled we leave the override disabled
+ * with all power down bits cleared to match the state we
+ * would use after disabling the port. Otherwise enable the
+ * override and set the lane powerdown bits accding to the
+ * current lane status.
+ */
+ if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
+ u32 status = I915_READ(DPLL(PIPE_A));
+ unsigned int mask;
+
+ mask = status & DPLL_PORTB_READY_MASK;
+ if (mask == 0xf)
+ mask = 0x0;
+ else
+ dev_priv->chv_phy_control |=
+ PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0);
+
+ dev_priv->chv_phy_control |=
+ PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH0);
+
+ mask = (status & DPLL_PORTC_READY_MASK) >> 4;
+ if (mask == 0xf)
+ mask = 0x0;
+ else
+ dev_priv->chv_phy_control |=
+ PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1);
+
+ dev_priv->chv_phy_control |=
+ PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH1);
+
+ dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY0);
+
+ dev_priv->chv_phy_assert[DPIO_PHY0] = false;
+ } else {
+ dev_priv->chv_phy_assert[DPIO_PHY0] = true;
+ }
+
+ if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
+ u32 status = I915_READ(DPIO_PHY_STATUS);
+ unsigned int mask;
+
+ mask = status & DPLL_PORTD_READY_MASK;
+
+ if (mask == 0xf)
+ mask = 0x0;
+ else
+ dev_priv->chv_phy_control |=
+ PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0);
+
+ dev_priv->chv_phy_control |=
+ PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY1, DPIO_CH0);
+
+ dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY1);
+
+ dev_priv->chv_phy_assert[DPIO_PHY1] = false;
+ } else {
+ dev_priv->chv_phy_assert[DPIO_PHY1] = true;
+ }
+
+ I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
+
+ DRM_DEBUG_KMS("Initial PHY_CONTROL=0x%08x\n",
+ dev_priv->chv_phy_control);
+}
+
+static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv)
+{
+ struct i915_power_well *cmn =
+ lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
+ struct i915_power_well *disp2d =
+ lookup_power_well(dev_priv, VLV_DISP_PW_DISP2D);
+
+ /* If the display might be already active skip this */
+ if (cmn->desc->ops->is_enabled(dev_priv, cmn) &&
+ disp2d->desc->ops->is_enabled(dev_priv, disp2d) &&
+ I915_READ(DPIO_CTL) & DPIO_CMNRST)
+ return;
+
+ DRM_DEBUG_KMS("toggling display PHY side reset\n");
+
+ /* cmnlane needs DPLL registers */
+ disp2d->desc->ops->enable(dev_priv, disp2d);
+
+ /*
+ * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx:
+ * Need to assert and de-assert PHY SB reset by gating the
+ * common lane power, then un-gating it.
+ * Simply ungating isn't enough to reset the PHY enough to get
+ * ports and lanes running.
+ */
+ cmn->desc->ops->disable(dev_priv, cmn);
+}
+
+static bool vlv_punit_is_power_gated(struct drm_i915_private *dev_priv, u32 reg0)
+{
+ bool ret;
+
+ vlv_punit_get(dev_priv);
+ ret = (vlv_punit_read(dev_priv, reg0) & SSPM0_SSC_MASK) == SSPM0_SSC_PWR_GATE;
+ vlv_punit_put(dev_priv);
+
+ return ret;
+}
+
+static void assert_ved_power_gated(struct drm_i915_private *dev_priv)
+{
+ WARN(!vlv_punit_is_power_gated(dev_priv, PUNIT_REG_VEDSSPM0),
+ "VED not power gated\n");
+}
+
+static void assert_isp_power_gated(struct drm_i915_private *dev_priv)
+{
+ static const struct pci_device_id isp_ids[] = {
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0f38)},
+ {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x22b8)},
+ {}
+ };
+
+ WARN(!pci_dev_present(isp_ids) &&
+ !vlv_punit_is_power_gated(dev_priv, PUNIT_REG_ISPSSPM0),
+ "ISP not power gated\n");
+}
+
+static void intel_power_domains_verify_state(struct drm_i915_private *dev_priv);
+
+/**
+ * intel_power_domains_init_hw - initialize hardware power domain state
+ * @i915: i915 device instance
+ * @resume: Called from resume code paths or not
+ *
+ * This function initializes the hardware power domain state and enables all
+ * power wells belonging to the INIT power domain. Power wells in other
+ * domains (and not in the INIT domain) are referenced or disabled by
+ * intel_modeset_readout_hw_state(). After that the reference count of each
+ * power well must match its HW enabled state, see
+ * intel_power_domains_verify_state().
+ *
+ * It will return with power domains disabled (to be enabled later by
+ * intel_power_domains_enable()) and must be paired with
+ * intel_power_domains_fini_hw().
+ */
+void intel_power_domains_init_hw(struct drm_i915_private *i915, bool resume)
+{
+ struct i915_power_domains *power_domains = &i915->power_domains;
+
+ power_domains->initializing = true;
+
+ if (INTEL_GEN(i915) >= 11) {
+ icl_display_core_init(i915, resume);
+ } else if (IS_CANNONLAKE(i915)) {
+ cnl_display_core_init(i915, resume);
+ } else if (IS_GEN9_BC(i915)) {
+ skl_display_core_init(i915, resume);
+ } else if (IS_GEN9_LP(i915)) {
+ bxt_display_core_init(i915, resume);
+ } else if (IS_CHERRYVIEW(i915)) {
+ mutex_lock(&power_domains->lock);
+ chv_phy_control_init(i915);
+ mutex_unlock(&power_domains->lock);
+ assert_isp_power_gated(i915);
+ } else if (IS_VALLEYVIEW(i915)) {
+ mutex_lock(&power_domains->lock);
+ vlv_cmnlane_wa(i915);
+ mutex_unlock(&power_domains->lock);
+ assert_ved_power_gated(i915);
+ assert_isp_power_gated(i915);
+ } else if (IS_BROADWELL(i915) || IS_HASWELL(i915)) {
+ hsw_assert_cdclk(i915);
+ intel_pch_reset_handshake(i915, !HAS_PCH_NOP(i915));
+ } else if (IS_IVYBRIDGE(i915)) {
+ intel_pch_reset_handshake(i915, !HAS_PCH_NOP(i915));
+ }
+
+ /*
+ * Keep all power wells enabled for any dependent HW access during
+ * initialization and to make sure we keep BIOS enabled display HW
+ * resources powered until display HW readout is complete. We drop
+ * this reference in intel_power_domains_enable().
+ */
+ power_domains->wakeref =
+ intel_display_power_get(i915, POWER_DOMAIN_INIT);
+
+ /* Disable power support if the user asked so. */
+ if (!i915_modparams.disable_power_well)
+ intel_display_power_get(i915, POWER_DOMAIN_INIT);
+ intel_power_domains_sync_hw(i915);
+
+ power_domains->initializing = false;
+}
+
+/**
+ * intel_power_domains_fini_hw - deinitialize hw power domain state
+ * @i915: i915 device instance
+ *
+ * De-initializes the display power domain HW state. It also ensures that the
+ * device stays powered up so that the driver can be reloaded.
+ *
+ * It must be called with power domains already disabled (after a call to
+ * intel_power_domains_disable()) and must be paired with
+ * intel_power_domains_init_hw().
+ */
+void intel_power_domains_fini_hw(struct drm_i915_private *i915)
+{
+ intel_wakeref_t wakeref __maybe_unused =
+ fetch_and_zero(&i915->power_domains.wakeref);
+
+ /* Remove the refcount we took to keep power well support disabled. */
+ if (!i915_modparams.disable_power_well)
+ intel_display_power_put_unchecked(i915, POWER_DOMAIN_INIT);
+
+ intel_display_power_flush_work_sync(i915);
+
+ intel_power_domains_verify_state(i915);
+
+ /* Keep the power well enabled, but cancel its rpm wakeref. */
+ intel_runtime_pm_put(i915, wakeref);
+}
+
+/**
+ * intel_power_domains_enable - enable toggling of display power wells
+ * @i915: i915 device instance
+ *
+ * Enable the ondemand enabling/disabling of the display power wells. Note that
+ * power wells not belonging to POWER_DOMAIN_INIT are allowed to be toggled
+ * only at specific points of the display modeset sequence, thus they are not
+ * affected by the intel_power_domains_enable()/disable() calls. The purpose
+ * of these function is to keep the rest of power wells enabled until the end
+ * of display HW readout (which will acquire the power references reflecting
+ * the current HW state).
+ */
+void intel_power_domains_enable(struct drm_i915_private *i915)
+{
+ intel_wakeref_t wakeref __maybe_unused =
+ fetch_and_zero(&i915->power_domains.wakeref);
+
+ intel_display_power_put(i915, POWER_DOMAIN_INIT, wakeref);
+ intel_power_domains_verify_state(i915);
+}
+
+/**
+ * intel_power_domains_disable - disable toggling of display power wells
+ * @i915: i915 device instance
+ *
+ * Disable the ondemand enabling/disabling of the display power wells. See
+ * intel_power_domains_enable() for which power wells this call controls.
+ */
+void intel_power_domains_disable(struct drm_i915_private *i915)
+{
+ struct i915_power_domains *power_domains = &i915->power_domains;
+
+ WARN_ON(power_domains->wakeref);
+ power_domains->wakeref =
+ intel_display_power_get(i915, POWER_DOMAIN_INIT);
+
+ intel_power_domains_verify_state(i915);
+}
+
+/**
+ * intel_power_domains_suspend - suspend power domain state
+ * @i915: i915 device instance
+ * @suspend_mode: specifies the target suspend state (idle, mem, hibernation)
+ *
+ * This function prepares the hardware power domain state before entering
+ * system suspend.
+ *
+ * It must be called with power domains already disabled (after a call to
+ * intel_power_domains_disable()) and paired with intel_power_domains_resume().
+ */
+void intel_power_domains_suspend(struct drm_i915_private *i915,
+ enum i915_drm_suspend_mode suspend_mode)
+{
+ struct i915_power_domains *power_domains = &i915->power_domains;
+ intel_wakeref_t wakeref __maybe_unused =
+ fetch_and_zero(&power_domains->wakeref);
+
+ intel_display_power_put(i915, POWER_DOMAIN_INIT, wakeref);
+
+ /*
+ * In case of suspend-to-idle (aka S0ix) on a DMC platform without DC9
+ * support don't manually deinit the power domains. This also means the
+ * CSR/DMC firmware will stay active, it will power down any HW
+ * resources as required and also enable deeper system power states
+ * that would be blocked if the firmware was inactive.
+ */
+ if (!(i915->csr.allowed_dc_mask & DC_STATE_EN_DC9) &&
+ suspend_mode == I915_DRM_SUSPEND_IDLE &&
+ i915->csr.dmc_payload) {
+ intel_display_power_flush_work(i915);
+ intel_power_domains_verify_state(i915);
+ return;
+ }
+
+ /*
+ * Even if power well support was disabled we still want to disable
+ * power wells if power domains must be deinitialized for suspend.
+ */
+ if (!i915_modparams.disable_power_well)
+ intel_display_power_put_unchecked(i915, POWER_DOMAIN_INIT);
+
+ intel_display_power_flush_work(i915);
+ intel_power_domains_verify_state(i915);
+
+ if (INTEL_GEN(i915) >= 11)
+ icl_display_core_uninit(i915);
+ else if (IS_CANNONLAKE(i915))
+ cnl_display_core_uninit(i915);
+ else if (IS_GEN9_BC(i915))
+ skl_display_core_uninit(i915);
+ else if (IS_GEN9_LP(i915))
+ bxt_display_core_uninit(i915);
+
+ power_domains->display_core_suspended = true;
+}
+
+/**
+ * intel_power_domains_resume - resume power domain state
+ * @i915: i915 device instance
+ *
+ * This function resume the hardware power domain state during system resume.
+ *
+ * It will return with power domain support disabled (to be enabled later by
+ * intel_power_domains_enable()) and must be paired with
+ * intel_power_domains_suspend().
+ */
+void intel_power_domains_resume(struct drm_i915_private *i915)
+{
+ struct i915_power_domains *power_domains = &i915->power_domains;
+
+ if (power_domains->display_core_suspended) {
+ intel_power_domains_init_hw(i915, true);
+ power_domains->display_core_suspended = false;
+ } else {
+ WARN_ON(power_domains->wakeref);
+ power_domains->wakeref =
+ intel_display_power_get(i915, POWER_DOMAIN_INIT);
+ }
+
+ intel_power_domains_verify_state(i915);
+}
+
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
+
+static void intel_power_domains_dump_info(struct drm_i915_private *i915)
+{
+ struct i915_power_domains *power_domains = &i915->power_domains;
+ struct i915_power_well *power_well;
+
+ for_each_power_well(i915, power_well) {
+ enum intel_display_power_domain domain;
+
+ DRM_DEBUG_DRIVER("%-25s %d\n",
+ power_well->desc->name, power_well->count);
+
+ for_each_power_domain(domain, power_well->desc->domains)
+ DRM_DEBUG_DRIVER(" %-23s %d\n",
+ intel_display_power_domain_str(domain),
+ power_domains->domain_use_count[domain]);
+ }
+}
+
+/**
+ * intel_power_domains_verify_state - verify the HW/SW state for all power wells
+ * @i915: i915 device instance
+ *
+ * Verify if the reference count of each power well matches its HW enabled
+ * state and the total refcount of the domains it belongs to. This must be
+ * called after modeset HW state sanitization, which is responsible for
+ * acquiring reference counts for any power wells in use and disabling the
+ * ones left on by BIOS but not required by any active output.
+ */
+static void intel_power_domains_verify_state(struct drm_i915_private *i915)
+{
+ struct i915_power_domains *power_domains = &i915->power_domains;
+ struct i915_power_well *power_well;
+ bool dump_domain_info;
+
+ mutex_lock(&power_domains->lock);
+
+ verify_async_put_domains_state(power_domains);
+
+ dump_domain_info = false;
+ for_each_power_well(i915, power_well) {
+ enum intel_display_power_domain domain;
+ int domains_count;
+ bool enabled;
+
+ enabled = power_well->desc->ops->is_enabled(i915, power_well);
+ if ((power_well->count || power_well->desc->always_on) !=
+ enabled)
+ DRM_ERROR("power well %s state mismatch (refcount %d/enabled %d)",
+ power_well->desc->name,
+ power_well->count, enabled);
+
+ domains_count = 0;
+ for_each_power_domain(domain, power_well->desc->domains)
+ domains_count += power_domains->domain_use_count[domain];
+
+ if (power_well->count != domains_count) {
+ DRM_ERROR("power well %s refcount/domain refcount mismatch "
+ "(refcount %d/domains refcount %d)\n",
+ power_well->desc->name, power_well->count,
+ domains_count);
+ dump_domain_info = true;
+ }
+ }
+
+ if (dump_domain_info) {
+ static bool dumped;
+
+ if (!dumped) {
+ intel_power_domains_dump_info(i915);
+ dumped = true;
+ }
+ }
+
+ mutex_unlock(&power_domains->lock);
+}
+
+#else
+
+static void intel_power_domains_verify_state(struct drm_i915_private *i915)
+{
+}
+
+#endif
#include <drm/drm_print.h>
#include "i915_drv.h"
-#include "i915_irq.h"
-#include "intel_cdclk.h"
-#include "intel_combo_phy.h"
-#include "intel_crt.h"
-#include "intel_csr.h"
-#include "intel_dp.h"
-#include "intel_dpio_phy.h"
-#include "intel_drv.h"
-#include "intel_hotplug.h"
-#include "intel_sideband.h"
/**
* DOC: runtime pm
* present for a given platform.
*/
-static intel_wakeref_t intel_runtime_pm_get_raw(struct drm_i915_private *i915);
-static void
-__intel_runtime_pm_put(struct drm_i915_private *i915, intel_wakeref_t wref,
- bool wakelock);
-
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
-static void
-intel_runtime_pm_put_raw(struct drm_i915_private *i915, intel_wakeref_t wref);
-#else
-static inline void intel_runtime_pm_put_raw(struct drm_i915_private *i915,
- intel_wakeref_t wref)
-{
- __intel_runtime_pm_put(i915, -1, false);
-}
-#endif
-
#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
#include <linux/sort.h>
__intel_wakeref_dec_and_check_tracking(i915);
}
-bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
- enum i915_power_well_id power_well_id);
-
-const char *
-intel_display_power_domain_str(enum intel_display_power_domain domain)
-{
- switch (domain) {
- case POWER_DOMAIN_DISPLAY_CORE:
- return "DISPLAY_CORE";
- case POWER_DOMAIN_PIPE_A:
- return "PIPE_A";
- case POWER_DOMAIN_PIPE_B:
- return "PIPE_B";
- case POWER_DOMAIN_PIPE_C:
- return "PIPE_C";
- case POWER_DOMAIN_PIPE_A_PANEL_FITTER:
- return "PIPE_A_PANEL_FITTER";
- case POWER_DOMAIN_PIPE_B_PANEL_FITTER:
- return "PIPE_B_PANEL_FITTER";
- case POWER_DOMAIN_PIPE_C_PANEL_FITTER:
- return "PIPE_C_PANEL_FITTER";
- case POWER_DOMAIN_TRANSCODER_A:
- return "TRANSCODER_A";
- case POWER_DOMAIN_TRANSCODER_B:
- return "TRANSCODER_B";
- case POWER_DOMAIN_TRANSCODER_C:
- return "TRANSCODER_C";
- case POWER_DOMAIN_TRANSCODER_EDP:
- return "TRANSCODER_EDP";
- case POWER_DOMAIN_TRANSCODER_EDP_VDSC:
- return "TRANSCODER_EDP_VDSC";
- case POWER_DOMAIN_TRANSCODER_DSI_A:
- return "TRANSCODER_DSI_A";
- case POWER_DOMAIN_TRANSCODER_DSI_C:
- return "TRANSCODER_DSI_C";
- case POWER_DOMAIN_PORT_DDI_A_LANES:
- return "PORT_DDI_A_LANES";
- case POWER_DOMAIN_PORT_DDI_B_LANES:
- return "PORT_DDI_B_LANES";
- case POWER_DOMAIN_PORT_DDI_C_LANES:
- return "PORT_DDI_C_LANES";
- case POWER_DOMAIN_PORT_DDI_D_LANES:
- return "PORT_DDI_D_LANES";
- case POWER_DOMAIN_PORT_DDI_E_LANES:
- return "PORT_DDI_E_LANES";
- case POWER_DOMAIN_PORT_DDI_F_LANES:
- return "PORT_DDI_F_LANES";
- case POWER_DOMAIN_PORT_DDI_A_IO:
- return "PORT_DDI_A_IO";
- case POWER_DOMAIN_PORT_DDI_B_IO:
- return "PORT_DDI_B_IO";
- case POWER_DOMAIN_PORT_DDI_C_IO:
- return "PORT_DDI_C_IO";
- case POWER_DOMAIN_PORT_DDI_D_IO:
- return "PORT_DDI_D_IO";
- case POWER_DOMAIN_PORT_DDI_E_IO:
- return "PORT_DDI_E_IO";
- case POWER_DOMAIN_PORT_DDI_F_IO:
- return "PORT_DDI_F_IO";
- case POWER_DOMAIN_PORT_DSI:
- return "PORT_DSI";
- case POWER_DOMAIN_PORT_CRT:
- return "PORT_CRT";
- case POWER_DOMAIN_PORT_OTHER:
- return "PORT_OTHER";
- case POWER_DOMAIN_VGA:
- return "VGA";
- case POWER_DOMAIN_AUDIO:
- return "AUDIO";
- case POWER_DOMAIN_AUX_A:
- return "AUX_A";
- case POWER_DOMAIN_AUX_B:
- return "AUX_B";
- case POWER_DOMAIN_AUX_C:
- return "AUX_C";
- case POWER_DOMAIN_AUX_D:
- return "AUX_D";
- case POWER_DOMAIN_AUX_E:
- return "AUX_E";
- case POWER_DOMAIN_AUX_F:
- return "AUX_F";
- case POWER_DOMAIN_AUX_IO_A:
- return "AUX_IO_A";
- case POWER_DOMAIN_AUX_TBT1:
- return "AUX_TBT1";
- case POWER_DOMAIN_AUX_TBT2:
- return "AUX_TBT2";
- case POWER_DOMAIN_AUX_TBT3:
- return "AUX_TBT3";
- case POWER_DOMAIN_AUX_TBT4:
- return "AUX_TBT4";
- case POWER_DOMAIN_GMBUS:
- return "GMBUS";
- case POWER_DOMAIN_INIT:
- return "INIT";
- case POWER_DOMAIN_MODESET:
- return "MODESET";
- case POWER_DOMAIN_GT_IRQ:
- return "GT_IRQ";
- default:
- MISSING_CASE(domain);
- return "?";
- }
-}
-
-static void intel_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- DRM_DEBUG_KMS("enabling %s\n", power_well->desc->name);
- power_well->desc->ops->enable(dev_priv, power_well);
- power_well->hw_enabled = true;
-}
-
-static void intel_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
+static intel_wakeref_t __intel_runtime_pm_get(struct drm_i915_private *i915,
+ bool wakelock)
{
- DRM_DEBUG_KMS("disabling %s\n", power_well->desc->name);
- power_well->hw_enabled = false;
- power_well->desc->ops->disable(dev_priv, power_well);
-}
+ struct pci_dev *pdev = i915->drm.pdev;
+ struct device *kdev = &pdev->dev;
+ int ret;
-static void intel_power_well_get(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- if (!power_well->count++)
- intel_power_well_enable(dev_priv, power_well);
-}
+ ret = pm_runtime_get_sync(kdev);
+ WARN_ONCE(ret < 0, "pm_runtime_get_sync() failed: %d\n", ret);
-static void intel_power_well_put(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- WARN(!power_well->count, "Use count on power well %s is already zero",
- power_well->desc->name);
+ intel_runtime_pm_acquire(i915, wakelock);
- if (!--power_well->count)
- intel_power_well_disable(dev_priv, power_well);
+ return track_intel_runtime_pm_wakeref(i915);
}
/**
- * __intel_display_power_is_enabled - unlocked check for a power domain
- * @dev_priv: i915 device instance
- * @domain: power domain to check
+ * intel_runtime_pm_get_raw - grab a raw runtime pm reference
+ * @i915: i915 device instance
*
* This is the unlocked version of intel_display_power_is_enabled() and should
* only be used from error capture and recovery code where deadlocks are
* possible.
+ * This function grabs a device-level runtime pm reference (mostly used for
+ * asynchronous PM management from display code) and ensures that it is powered
+ * up. Raw references are not considered during wakelock assert checks.
*
* Returns:
* True when the power domain is enabled, false otherwise.
+ * Any runtime pm reference obtained by this function must have a symmetric
+ * call to intel_runtime_pm_put_raw() to release the reference again.
+ *
+ * Returns: the wakeref cookie to pass to intel_runtime_pm_put_raw(), evaluates
+ * as True if the wakeref was acquired, or False otherwise.
*/
-bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
- enum intel_display_power_domain domain)
-{
- struct i915_power_well *power_well;
- bool is_enabled;
-
- if (dev_priv->runtime_pm.suspended)
- return false;
-
- is_enabled = true;
-
- for_each_power_domain_well_reverse(dev_priv, power_well, BIT_ULL(domain)) {
- if (power_well->desc->always_on)
- continue;
-
- if (!power_well->hw_enabled) {
- is_enabled = false;
- break;
- }
- }
- return is_enabled;
+intel_wakeref_t intel_runtime_pm_get_raw(struct drm_i915_private *i915)
+{
+ return __intel_runtime_pm_get(i915, false);
}
/**
- * intel_display_power_is_enabled - check for a power domain
- * @dev_priv: i915 device instance
- * @domain: power domain to check
+ * intel_runtime_pm_get - grab a runtime pm reference
+ * @i915: i915 device instance
*
- * This function can be used to check the hw power domain state. It is mostly
- * used in hardware state readout functions. Everywhere else code should rely
- * upon explicit power domain reference counting to ensure that the hardware
- * block is powered up before accessing it.
+ * This function grabs a device-level runtime pm reference (mostly used for GEM
+ * code to ensure the GTT or GT is on) and ensures that it is powered up.
*
- * Callers must hold the relevant modesetting locks to ensure that concurrent
- * threads can't disable the power well while the caller tries to read a few
- * registers.
+ * Any runtime pm reference obtained by this function must have a symmetric
+ * call to intel_runtime_pm_put() to release the reference again.
*
- * Returns:
- * True when the power domain is enabled, false otherwise.
+ * Returns: the wakeref cookie to pass to intel_runtime_pm_put()
*/
-bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
- enum intel_display_power_domain domain)
+intel_wakeref_t intel_runtime_pm_get(struct drm_i915_private *i915)
{
- struct i915_power_domains *power_domains;
- bool ret;
-
- power_domains = &dev_priv->power_domains;
-
- mutex_lock(&power_domains->lock);
- ret = __intel_display_power_is_enabled(dev_priv, domain);
- mutex_unlock(&power_domains->lock);
-
- return ret;
+ return __intel_runtime_pm_get(i915, true);
}
-/*
- * Starting with Haswell, we have a "Power Down Well" that can be turned off
- * when not needed anymore. We have 4 registers that can request the power well
- * to be enabled, and it will only be disabled if none of the registers is
- * requesting it to be enabled.
+/**
+ * intel_runtime_pm_get_if_in_use - grab a runtime pm reference if device in use
+ * @i915: i915 device instance
+ *
+ * This function grabs a device-level runtime pm reference if the device is
+ * already in use and ensures that it is powered up. It is illegal to try
+ * and access the HW should intel_runtime_pm_get_if_in_use() report failure.
+ *
+ * Any runtime pm reference obtained by this function must have a symmetric
+ * call to intel_runtime_pm_put() to release the reference again.
+ *
+ * Returns: the wakeref cookie to pass to intel_runtime_pm_put(), evaluates
+ * as True if the wakeref was acquired, or False otherwise.
*/
-static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv,
- u8 irq_pipe_mask, bool has_vga)
-{
- struct pci_dev *pdev = dev_priv->drm.pdev;
-
- /*
- * After we re-enable the power well, if we touch VGA register 0x3d5
- * we'll get unclaimed register interrupts. This stops after we write
- * anything to the VGA MSR register. The vgacon module uses this
- * register all the time, so if we unbind our driver and, as a
- * consequence, bind vgacon, we'll get stuck in an infinite loop at
- * console_unlock(). So make here we touch the VGA MSR register, making
- * sure vgacon can keep working normally without triggering interrupts
- * and error messages.
- */
- if (has_vga) {
- vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
- outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
- vga_put(pdev, VGA_RSRC_LEGACY_IO);
- }
-
- if (irq_pipe_mask)
- gen8_irq_power_well_post_enable(dev_priv, irq_pipe_mask);
-}
-
-static void hsw_power_well_pre_disable(struct drm_i915_private *dev_priv,
- u8 irq_pipe_mask)
-{
- if (irq_pipe_mask)
- gen8_irq_power_well_pre_disable(dev_priv, irq_pipe_mask);
-}
-
-
-static void hsw_wait_for_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
- int pw_idx = power_well->desc->hsw.idx;
-
- /* Timeout for PW1:10 us, AUX:not specified, other PWs:20 us. */
- WARN_ON(intel_wait_for_register(&dev_priv->uncore,
- regs->driver,
- HSW_PWR_WELL_CTL_STATE(pw_idx),
- HSW_PWR_WELL_CTL_STATE(pw_idx),
- 1));
-}
-
-static u32 hsw_power_well_requesters(struct drm_i915_private *dev_priv,
- const struct i915_power_well_regs *regs,
- int pw_idx)
-{
- u32 req_mask = HSW_PWR_WELL_CTL_REQ(pw_idx);
- u32 ret;
-
- ret = I915_READ(regs->bios) & req_mask ? 1 : 0;
- ret |= I915_READ(regs->driver) & req_mask ? 2 : 0;
- if (regs->kvmr.reg)
- ret |= I915_READ(regs->kvmr) & req_mask ? 4 : 0;
- ret |= I915_READ(regs->debug) & req_mask ? 8 : 0;
-
- return ret;
-}
-
-static void hsw_wait_for_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
- int pw_idx = power_well->desc->hsw.idx;
- bool disabled;
- u32 reqs;
-
- /*
- * Bspec doesn't require waiting for PWs to get disabled, but still do
- * this for paranoia. The known cases where a PW will be forced on:
- * - a KVMR request on any power well via the KVMR request register
- * - a DMC request on PW1 and MISC_IO power wells via the BIOS and
- * DEBUG request registers
- * Skip the wait in case any of the request bits are set and print a
- * diagnostic message.
- */
- wait_for((disabled = !(I915_READ(regs->driver) &
- HSW_PWR_WELL_CTL_STATE(pw_idx))) ||
- (reqs = hsw_power_well_requesters(dev_priv, regs, pw_idx)), 1);
- if (disabled)
- return;
-
- DRM_DEBUG_KMS("%s forced on (bios:%d driver:%d kvmr:%d debug:%d)\n",
- power_well->desc->name,
- !!(reqs & 1), !!(reqs & 2), !!(reqs & 4), !!(reqs & 8));
-}
-
-static void gen9_wait_for_power_well_fuses(struct drm_i915_private *dev_priv,
- enum skl_power_gate pg)
-{
- /* Timeout 5us for PG#0, for other PGs 1us */
- WARN_ON(intel_wait_for_register(&dev_priv->uncore, SKL_FUSE_STATUS,
- SKL_FUSE_PG_DIST_STATUS(pg),
- SKL_FUSE_PG_DIST_STATUS(pg), 1));
-}
-
-static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
+intel_wakeref_t intel_runtime_pm_get_if_in_use(struct drm_i915_private *i915)
{
- const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
- int pw_idx = power_well->desc->hsw.idx;
- bool wait_fuses = power_well->desc->hsw.has_fuses;
- enum skl_power_gate uninitialized_var(pg);
- u32 val;
+ if (IS_ENABLED(CONFIG_PM)) {
+ struct pci_dev *pdev = i915->drm.pdev;
+ struct device *kdev = &pdev->dev;
- if (wait_fuses) {
- pg = INTEL_GEN(dev_priv) >= 11 ? ICL_PW_CTL_IDX_TO_PG(pw_idx) :
- SKL_PW_CTL_IDX_TO_PG(pw_idx);
/*
- * For PW1 we have to wait both for the PW0/PG0 fuse state
- * before enabling the power well and PW1/PG1's own fuse
- * state after the enabling. For all other power wells with
- * fuses we only have to wait for that PW/PG's fuse state
- * after the enabling.
+ * In cases runtime PM is disabled by the RPM core and we get
+ * an -EINVAL return value we are not supposed to call this
+ * function, since the power state is undefined. This applies
+ * atm to the late/early system suspend/resume handlers.
*/
- if (pg == SKL_PG1)
- gen9_wait_for_power_well_fuses(dev_priv, SKL_PG0);
- }
-
- val = I915_READ(regs->driver);
- I915_WRITE(regs->driver, val | HSW_PWR_WELL_CTL_REQ(pw_idx));
- hsw_wait_for_power_well_enable(dev_priv, power_well);
-
- /* Display WA #1178: cnl */
- if (IS_CANNONLAKE(dev_priv) &&
- pw_idx >= GLK_PW_CTL_IDX_AUX_B &&
- pw_idx <= CNL_PW_CTL_IDX_AUX_F) {
- val = I915_READ(CNL_AUX_ANAOVRD1(pw_idx));
- val |= CNL_AUX_ANAOVRD1_ENABLE | CNL_AUX_ANAOVRD1_LDO_BYPASS;
- I915_WRITE(CNL_AUX_ANAOVRD1(pw_idx), val);
- }
-
- if (wait_fuses)
- gen9_wait_for_power_well_fuses(dev_priv, pg);
-
- hsw_power_well_post_enable(dev_priv,
- power_well->desc->hsw.irq_pipe_mask,
- power_well->desc->hsw.has_vga);
-}
-
-static void hsw_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
- int pw_idx = power_well->desc->hsw.idx;
- u32 val;
-
- hsw_power_well_pre_disable(dev_priv,
- power_well->desc->hsw.irq_pipe_mask);
-
- val = I915_READ(regs->driver);
- I915_WRITE(regs->driver, val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
- hsw_wait_for_power_well_disable(dev_priv, power_well);
-}
-
-#define ICL_AUX_PW_TO_PORT(pw_idx) ((pw_idx) - ICL_PW_CTL_IDX_AUX_A)
-
-static void
-icl_combo_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
- int pw_idx = power_well->desc->hsw.idx;
- enum port port = ICL_AUX_PW_TO_PORT(pw_idx);
- u32 val;
-
- val = I915_READ(regs->driver);
- I915_WRITE(regs->driver, val | HSW_PWR_WELL_CTL_REQ(pw_idx));
-
- val = I915_READ(ICL_PORT_CL_DW12(port));
- I915_WRITE(ICL_PORT_CL_DW12(port), val | ICL_LANE_ENABLE_AUX);
-
- hsw_wait_for_power_well_enable(dev_priv, power_well);
-
- /* Display WA #1178: icl */
- if (IS_ICELAKE(dev_priv) &&
- pw_idx >= ICL_PW_CTL_IDX_AUX_A && pw_idx <= ICL_PW_CTL_IDX_AUX_B &&
- !intel_bios_is_port_edp(dev_priv, port)) {
- val = I915_READ(ICL_AUX_ANAOVRD1(pw_idx));
- val |= ICL_AUX_ANAOVRD1_ENABLE | ICL_AUX_ANAOVRD1_LDO_BYPASS;
- I915_WRITE(ICL_AUX_ANAOVRD1(pw_idx), val);
+ if (pm_runtime_get_if_in_use(kdev) <= 0)
+ return 0;
}
-}
-
-static void
-icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
- int pw_idx = power_well->desc->hsw.idx;
- enum port port = ICL_AUX_PW_TO_PORT(pw_idx);
- u32 val;
-
- val = I915_READ(ICL_PORT_CL_DW12(port));
- I915_WRITE(ICL_PORT_CL_DW12(port), val & ~ICL_LANE_ENABLE_AUX);
-
- val = I915_READ(regs->driver);
- I915_WRITE(regs->driver, val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));
-
- hsw_wait_for_power_well_disable(dev_priv, power_well);
-}
-
-#define ICL_AUX_PW_TO_CH(pw_idx) \
- ((pw_idx) - ICL_PW_CTL_IDX_AUX_A + AUX_CH_A)
-
-static void
-icl_tc_phy_aux_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- enum aux_ch aux_ch = ICL_AUX_PW_TO_CH(power_well->desc->hsw.idx);
- u32 val;
-
- val = I915_READ(DP_AUX_CH_CTL(aux_ch));
- val &= ~DP_AUX_CH_CTL_TBT_IO;
- if (power_well->desc->hsw.is_tc_tbt)
- val |= DP_AUX_CH_CTL_TBT_IO;
- I915_WRITE(DP_AUX_CH_CTL(aux_ch), val);
-
- hsw_power_well_enable(dev_priv, power_well);
-}
-
-/*
- * We should only use the power well if we explicitly asked the hardware to
- * enable it, so check if it's enabled and also check if we've requested it to
- * be enabled.
- */
-static bool hsw_power_well_enabled(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
- enum i915_power_well_id id = power_well->desc->id;
- int pw_idx = power_well->desc->hsw.idx;
- u32 mask = HSW_PWR_WELL_CTL_REQ(pw_idx) |
- HSW_PWR_WELL_CTL_STATE(pw_idx);
- u32 val;
-
- val = I915_READ(regs->driver);
-
- /*
- * On GEN9 big core due to a DMC bug the driver's request bits for PW1
- * and the MISC_IO PW will be not restored, so check instead for the
- * BIOS's own request bits, which are forced-on for these power wells
- * when exiting DC5/6.
- */
- if (IS_GEN(dev_priv, 9) && !IS_GEN9_LP(dev_priv) &&
- (id == SKL_DISP_PW_1 || id == SKL_DISP_PW_MISC_IO))
- val |= I915_READ(regs->bios);
-
- return (val & mask) == mask;
-}
-
-static void assert_can_enable_dc9(struct drm_i915_private *dev_priv)
-{
- WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9),
- "DC9 already programmed to be enabled.\n");
- WARN_ONCE(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
- "DC5 still not disabled to enable DC9.\n");
- WARN_ONCE(I915_READ(HSW_PWR_WELL_CTL2) &
- HSW_PWR_WELL_CTL_REQ(SKL_PW_CTL_IDX_PW_2),
- "Power well 2 on.\n");
- WARN_ONCE(intel_irqs_enabled(dev_priv),
- "Interrupts not disabled yet.\n");
-
- /*
- * TODO: check for the following to verify the conditions to enter DC9
- * state are satisfied:
- * 1] Check relevant display engine registers to verify if mode set
- * disable sequence was followed.
- * 2] Check if display uninitialize sequence is initialized.
- */
-}
-
-static void assert_can_disable_dc9(struct drm_i915_private *dev_priv)
-{
- WARN_ONCE(intel_irqs_enabled(dev_priv),
- "Interrupts not disabled yet.\n");
- WARN_ONCE(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
- "DC5 still not disabled.\n");
-
- /*
- * TODO: check for the following to verify DC9 state was indeed
- * entered before programming to disable it:
- * 1] Check relevant display engine registers to verify if mode
- * set disable sequence was followed.
- * 2] Check if display uninitialize sequence is initialized.
- */
-}
-
-static void gen9_write_dc_state(struct drm_i915_private *dev_priv,
- u32 state)
-{
- int rewrites = 0;
- int rereads = 0;
- u32 v;
-
- I915_WRITE(DC_STATE_EN, state);
-
- /* It has been observed that disabling the dc6 state sometimes
- * doesn't stick and dmc keeps returning old value. Make sure
- * the write really sticks enough times and also force rewrite until
- * we are confident that state is exactly what we want.
- */
- do {
- v = I915_READ(DC_STATE_EN);
-
- if (v != state) {
- I915_WRITE(DC_STATE_EN, state);
- rewrites++;
- rereads = 0;
- } else if (rereads++ > 5) {
- break;
- }
-
- } while (rewrites < 100);
- if (v != state)
- DRM_ERROR("Writing dc state to 0x%x failed, now 0x%x\n",
- state, v);
-
- /* Most of the times we need one retry, avoid spam */
- if (rewrites > 1)
- DRM_DEBUG_KMS("Rewrote dc state to 0x%x %d times\n",
- state, rewrites);
-}
-
-static u32 gen9_dc_mask(struct drm_i915_private *dev_priv)
-{
- u32 mask;
-
- mask = DC_STATE_EN_UPTO_DC5;
- if (INTEL_GEN(dev_priv) >= 11)
- mask |= DC_STATE_EN_UPTO_DC6 | DC_STATE_EN_DC9;
- else if (IS_GEN9_LP(dev_priv))
- mask |= DC_STATE_EN_DC9;
- else
- mask |= DC_STATE_EN_UPTO_DC6;
-
- return mask;
-}
-
-void gen9_sanitize_dc_state(struct drm_i915_private *dev_priv)
-{
- u32 val;
-
- val = I915_READ(DC_STATE_EN) & gen9_dc_mask(dev_priv);
+ intel_runtime_pm_acquire(i915, true);
- DRM_DEBUG_KMS("Resetting DC state tracking from %02x to %02x\n",
- dev_priv->csr.dc_state, val);
- dev_priv->csr.dc_state = val;
+ return track_intel_runtime_pm_wakeref(i915);
}
/**
- * gen9_set_dc_state - set target display C power state
- * @dev_priv: i915 device instance
- * @state: target DC power state
- * - DC_STATE_DISABLE
- * - DC_STATE_EN_UPTO_DC5
- * - DC_STATE_EN_UPTO_DC6
- * - DC_STATE_EN_DC9
+ * intel_runtime_pm_get_noresume - grab a runtime pm reference
+ * @i915: i915 device instance
+ *
+ * This function grabs a device-level runtime pm reference (mostly used for GEM
+ * code to ensure the GTT or GT is on).
+ *
+ * It will _not_ power up the device but instead only check that it's powered
+ * on. Therefore it is only valid to call this functions from contexts where
+ * the device is known to be powered up and where trying to power it up would
+ * result in hilarity and deadlocks. That pretty much means only the system
+ * suspend/resume code where this is used to grab runtime pm references for
+ * delayed setup down in work items.
*
- * Signal to DMC firmware/HW the target DC power state passed in @state.
- * DMC/HW can turn off individual display clocks and power rails when entering
- * a deeper DC power state (higher in number) and turns these back when exiting
- * that state to a shallower power state (lower in number). The HW will decide
- * when to actually enter a given state on an on-demand basis, for instance
- * depending on the active state of display pipes. The state of display
- * registers backed by affected power rails are saved/restored as needed.
+ * Any runtime pm reference obtained by this function must have a symmetric
+ * call to intel_runtime_pm_put() to release the reference again.
*
- * Based on the above enabling a deeper DC power state is asynchronous wrt.
- * enabling it. Disabling a deeper power state is synchronous: for instance
- * setting %DC_STATE_DISABLE won't complete until all HW resources are turned
- * back on and register state is restored. This is guaranteed by the MMIO write
- * to DC_STATE_EN blocking until the state is restored.
+ * Returns: the wakeref cookie to pass to intel_runtime_pm_put()
*/
-static void gen9_set_dc_state(struct drm_i915_private *dev_priv, u32 state)
-{
- u32 val;
- u32 mask;
-
- if (WARN_ON_ONCE(state & ~dev_priv->csr.allowed_dc_mask))
- state &= dev_priv->csr.allowed_dc_mask;
-
- val = I915_READ(DC_STATE_EN);
- mask = gen9_dc_mask(dev_priv);
- DRM_DEBUG_KMS("Setting DC state from %02x to %02x\n",
- val & mask, state);
-
- /* Check if DMC is ignoring our DC state requests */
- if ((val & mask) != dev_priv->csr.dc_state)
- DRM_ERROR("DC state mismatch (0x%x -> 0x%x)\n",
- dev_priv->csr.dc_state, val & mask);
-
- val &= ~mask;
- val |= state;
-
- gen9_write_dc_state(dev_priv, val);
-
- dev_priv->csr.dc_state = val & mask;
-}
-
-void bxt_enable_dc9(struct drm_i915_private *dev_priv)
-{
- assert_can_enable_dc9(dev_priv);
-
- DRM_DEBUG_KMS("Enabling DC9\n");
- /*
- * Power sequencer reset is not needed on
- * platforms with South Display Engine on PCH,
- * because PPS registers are always on.
- */
- if (!HAS_PCH_SPLIT(dev_priv))
- intel_power_sequencer_reset(dev_priv);
- gen9_set_dc_state(dev_priv, DC_STATE_EN_DC9);
-}
-
-void bxt_disable_dc9(struct drm_i915_private *dev_priv)
+intel_wakeref_t intel_runtime_pm_get_noresume(struct drm_i915_private *i915)
{
- assert_can_disable_dc9(dev_priv);
+ struct pci_dev *pdev = i915->drm.pdev;
+ struct device *kdev = &pdev->dev;
- DRM_DEBUG_KMS("Disabling DC9\n");
+ assert_rpm_wakelock_held(i915);
+ pm_runtime_get_noresume(kdev);
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
+ intel_runtime_pm_acquire(i915, true);
- intel_pps_unlock_regs_wa(dev_priv);
+ return track_intel_runtime_pm_wakeref(i915);
}
-static void assert_csr_loaded(struct drm_i915_private *dev_priv)
+static void __intel_runtime_pm_put(struct drm_i915_private *i915,
+ intel_wakeref_t wref,
+ bool wakelock)
{
- WARN_ONCE(!I915_READ(CSR_PROGRAM(0)),
- "CSR program storage start is NULL\n");
- WARN_ONCE(!I915_READ(CSR_SSP_BASE), "CSR SSP Base Not fine\n");
- WARN_ONCE(!I915_READ(CSR_HTP_SKL), "CSR HTP Not fine\n");
-}
+ struct pci_dev *pdev = i915->drm.pdev;
+ struct device *kdev = &pdev->dev;
-static struct i915_power_well *
-lookup_power_well(struct drm_i915_private *dev_priv,
- enum i915_power_well_id power_well_id)
-{
- struct i915_power_well *power_well;
+ untrack_intel_runtime_pm_wakeref(i915, wref);
- for_each_power_well(dev_priv, power_well)
- if (power_well->desc->id == power_well_id)
- return power_well;
+ intel_runtime_pm_release(i915, wakelock);
- /*
- * It's not feasible to add error checking code to the callers since
- * this condition really shouldn't happen and it doesn't even make sense
- * to abort things like display initialization sequences. Just return
- * the first power well and hope the WARN gets reported so we can fix
- * our driver.
- */
- WARN(1, "Power well %d not defined for this platform\n", power_well_id);
- return &dev_priv->power_domains.power_wells[0];
+ pm_runtime_mark_last_busy(kdev);
+ pm_runtime_put_autosuspend(kdev);
}
-static void assert_can_enable_dc5(struct drm_i915_private *dev_priv)
+/**
+ * intel_runtime_pm_put_raw - release a raw runtime pm reference
+ * @i915: i915 device instance
+ * @wref: wakeref acquired for the reference that is being released
+ *
+ * This function drops the device-level runtime pm reference obtained by
+ * intel_runtime_pm_get_raw() and might power down the corresponding
+ * hardware block right away if this is the last reference.
+ */
+void
+intel_runtime_pm_put_raw(struct drm_i915_private *i915, intel_wakeref_t wref)
{
- bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv,
- SKL_DISP_PW_2);
-
- WARN_ONCE(pg2_enabled, "PG2 not disabled to enable DC5.\n");
-
- WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5),
- "DC5 already programmed to be enabled.\n");
- assert_rpm_wakelock_held(dev_priv);
-
- assert_csr_loaded(dev_priv);
+ __intel_runtime_pm_put(i915, wref, false);
}
-void gen9_enable_dc5(struct drm_i915_private *dev_priv)
-{
- assert_can_enable_dc5(dev_priv);
-
- DRM_DEBUG_KMS("Enabling DC5\n");
-
- /* Wa Display #1183: skl,kbl,cfl */
- if (IS_GEN9_BC(dev_priv))
- I915_WRITE(GEN8_CHICKEN_DCPR_1, I915_READ(GEN8_CHICKEN_DCPR_1) |
- SKL_SELECT_ALTERNATE_DC_EXIT);
-
- gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5);
-}
-
-static void assert_can_enable_dc6(struct drm_i915_private *dev_priv)
-{
- WARN_ONCE(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,
- "Backlight is not disabled.\n");
- WARN_ONCE((I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6),
- "DC6 already programmed to be enabled.\n");
-
- assert_csr_loaded(dev_priv);
-}
-
-void skl_enable_dc6(struct drm_i915_private *dev_priv)
-{
- assert_can_enable_dc6(dev_priv);
-
- DRM_DEBUG_KMS("Enabling DC6\n");
-
- /* Wa Display #1183: skl,kbl,cfl */
- if (IS_GEN9_BC(dev_priv))
- I915_WRITE(GEN8_CHICKEN_DCPR_1, I915_READ(GEN8_CHICKEN_DCPR_1) |
- SKL_SELECT_ALTERNATE_DC_EXIT);
-
- gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6);
-}
-
-static void hsw_power_well_sync_hw(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- const struct i915_power_well_regs *regs = power_well->desc->hsw.regs;
- int pw_idx = power_well->desc->hsw.idx;
- u32 mask = HSW_PWR_WELL_CTL_REQ(pw_idx);
- u32 bios_req = I915_READ(regs->bios);
-
- /* Take over the request bit if set by BIOS. */
- if (bios_req & mask) {
- u32 drv_req = I915_READ(regs->driver);
-
- if (!(drv_req & mask))
- I915_WRITE(regs->driver, drv_req | mask);
- I915_WRITE(regs->bios, bios_req & ~mask);
- }
-}
-
-static void bxt_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- bxt_ddi_phy_init(dev_priv, power_well->desc->bxt.phy);
-}
-
-static void bxt_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- bxt_ddi_phy_uninit(dev_priv, power_well->desc->bxt.phy);
-}
-
-static bool bxt_dpio_cmn_power_well_enabled(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- return bxt_ddi_phy_is_enabled(dev_priv, power_well->desc->bxt.phy);
-}
-
-static void bxt_verify_ddi_phy_power_wells(struct drm_i915_private *dev_priv)
-{
- struct i915_power_well *power_well;
-
- power_well = lookup_power_well(dev_priv, BXT_DISP_PW_DPIO_CMN_A);
- if (power_well->count > 0)
- bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);
-
- power_well = lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
- if (power_well->count > 0)
- bxt_ddi_phy_verify_state(dev_priv, power_well->desc->bxt.phy);
-
- if (IS_GEMINILAKE(dev_priv)) {
- power_well = lookup_power_well(dev_priv,
- GLK_DISP_PW_DPIO_CMN_C);
- if (power_well->count > 0)
- bxt_ddi_phy_verify_state(dev_priv,
- power_well->desc->bxt.phy);
- }
-}
-
-static bool gen9_dc_off_power_well_enabled(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- return (I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5_DC6_MASK) == 0;
-}
-
-static void gen9_assert_dbuf_enabled(struct drm_i915_private *dev_priv)
-{
- u32 tmp = I915_READ(DBUF_CTL);
-
- WARN((tmp & (DBUF_POWER_STATE | DBUF_POWER_REQUEST)) !=
- (DBUF_POWER_STATE | DBUF_POWER_REQUEST),
- "Unexpected DBuf power power state (0x%08x)\n", tmp);
-}
-
-static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- struct intel_cdclk_state cdclk_state = {};
-
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
-
- dev_priv->display.get_cdclk(dev_priv, &cdclk_state);
- /* Can't read out voltage_level so can't use intel_cdclk_changed() */
- WARN_ON(intel_cdclk_needs_modeset(&dev_priv->cdclk.hw, &cdclk_state));
-
- gen9_assert_dbuf_enabled(dev_priv);
-
- if (IS_GEN9_LP(dev_priv))
- bxt_verify_ddi_phy_power_wells(dev_priv);
-
- if (INTEL_GEN(dev_priv) >= 11)
- /*
- * DMC retains HW context only for port A, the other combo
- * PHY's HW context for port B is lost after DC transitions,
- * so we need to restore it manually.
- */
- intel_combo_phy_init(dev_priv);
-}
-
-static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- if (!dev_priv->csr.dmc_payload)
- return;
-
- if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC6)
- skl_enable_dc6(dev_priv);
- else if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5)
- gen9_enable_dc5(dev_priv);
-}
-
-static void i9xx_power_well_sync_hw_noop(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
-}
-
-static void i9xx_always_on_power_well_noop(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
-}
-
-static bool i9xx_always_on_power_well_enabled(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- return true;
-}
-
-static void i830_pipes_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- if ((I915_READ(PIPECONF(PIPE_A)) & PIPECONF_ENABLE) == 0)
- i830_enable_pipe(dev_priv, PIPE_A);
- if ((I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE) == 0)
- i830_enable_pipe(dev_priv, PIPE_B);
-}
-
-static void i830_pipes_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- i830_disable_pipe(dev_priv, PIPE_B);
- i830_disable_pipe(dev_priv, PIPE_A);
-}
-
-static bool i830_pipes_power_well_enabled(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- return I915_READ(PIPECONF(PIPE_A)) & PIPECONF_ENABLE &&
- I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE;
-}
-
-static void i830_pipes_power_well_sync_hw(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- if (power_well->count > 0)
- i830_pipes_power_well_enable(dev_priv, power_well);
- else
- i830_pipes_power_well_disable(dev_priv, power_well);
-}
-
-static void vlv_set_power_well(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well, bool enable)
-{
- int pw_idx = power_well->desc->vlv.idx;
- u32 mask;
- u32 state;
- u32 ctrl;
-
- mask = PUNIT_PWRGT_MASK(pw_idx);
- state = enable ? PUNIT_PWRGT_PWR_ON(pw_idx) :
- PUNIT_PWRGT_PWR_GATE(pw_idx);
-
- vlv_punit_get(dev_priv);
-
-#define COND \
- ((vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask) == state)
-
- if (COND)
- goto out;
-
- ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL);
- ctrl &= ~mask;
- ctrl |= state;
- vlv_punit_write(dev_priv, PUNIT_REG_PWRGT_CTRL, ctrl);
-
- if (wait_for(COND, 100))
- DRM_ERROR("timeout setting power well state %08x (%08x)\n",
- state,
- vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL));
-
-#undef COND
-
-out:
- vlv_punit_put(dev_priv);
-}
-
-static void vlv_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- vlv_set_power_well(dev_priv, power_well, true);
-}
-
-static void vlv_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- vlv_set_power_well(dev_priv, power_well, false);
-}
-
-static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- int pw_idx = power_well->desc->vlv.idx;
- bool enabled = false;
- u32 mask;
- u32 state;
- u32 ctrl;
-
- mask = PUNIT_PWRGT_MASK(pw_idx);
- ctrl = PUNIT_PWRGT_PWR_ON(pw_idx);
-
- vlv_punit_get(dev_priv);
-
- state = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_STATUS) & mask;
- /*
- * We only ever set the power-on and power-gate states, anything
- * else is unexpected.
- */
- WARN_ON(state != PUNIT_PWRGT_PWR_ON(pw_idx) &&
- state != PUNIT_PWRGT_PWR_GATE(pw_idx));
- if (state == ctrl)
- enabled = true;
-
- /*
- * A transient state at this point would mean some unexpected party
- * is poking at the power controls too.
- */
- ctrl = vlv_punit_read(dev_priv, PUNIT_REG_PWRGT_CTRL) & mask;
- WARN_ON(ctrl != state);
-
- vlv_punit_put(dev_priv);
-
- return enabled;
-}
-
-static void vlv_init_display_clock_gating(struct drm_i915_private *dev_priv)
-{
- u32 val;
-
- /*
- * On driver load, a pipe may be active and driving a DSI display.
- * Preserve DPOUNIT_CLOCK_GATE_DISABLE to avoid the pipe getting stuck
- * (and never recovering) in this case. intel_dsi_post_disable() will
- * clear it when we turn off the display.
- */
- val = I915_READ(DSPCLK_GATE_D);
- val &= DPOUNIT_CLOCK_GATE_DISABLE;
- val |= VRHUNIT_CLOCK_GATE_DISABLE;
- I915_WRITE(DSPCLK_GATE_D, val);
-
- /*
- * Disable trickle feed and enable pnd deadline calculation
- */
- I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE);
- I915_WRITE(CBR1_VLV, 0);
-
- WARN_ON(dev_priv->rawclk_freq == 0);
-
- I915_WRITE(RAWCLK_FREQ_VLV,
- DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 1000));
-}
-
-static void vlv_display_power_well_init(struct drm_i915_private *dev_priv)
-{
- struct intel_encoder *encoder;
- enum pipe pipe;
-
- /*
- * Enable the CRI clock source so we can get at the
- * display and the reference clock for VGA
- * hotplug / manual detection. Supposedly DSI also
- * needs the ref clock up and running.
- *
- * CHV DPLL B/C have some issues if VGA mode is enabled.
- */
- for_each_pipe(dev_priv, pipe) {
- u32 val = I915_READ(DPLL(pipe));
-
- val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
- if (pipe != PIPE_A)
- val |= DPLL_INTEGRATED_CRI_CLK_VLV;
-
- I915_WRITE(DPLL(pipe), val);
- }
-
- vlv_init_display_clock_gating(dev_priv);
-
- spin_lock_irq(&dev_priv->irq_lock);
- valleyview_enable_display_irqs(dev_priv);
- spin_unlock_irq(&dev_priv->irq_lock);
-
- /*
- * During driver initialization/resume we can avoid restoring the
- * part of the HW/SW state that will be inited anyway explicitly.
- */
- if (dev_priv->power_domains.initializing)
- return;
-
- intel_hpd_init(dev_priv);
-
- /* Re-enable the ADPA, if we have one */
- for_each_intel_encoder(&dev_priv->drm, encoder) {
- if (encoder->type == INTEL_OUTPUT_ANALOG)
- intel_crt_reset(&encoder->base);
- }
-
- i915_redisable_vga_power_on(dev_priv);
-
- intel_pps_unlock_regs_wa(dev_priv);
-}
-
-static void vlv_display_power_well_deinit(struct drm_i915_private *dev_priv)
-{
- spin_lock_irq(&dev_priv->irq_lock);
- valleyview_disable_display_irqs(dev_priv);
- spin_unlock_irq(&dev_priv->irq_lock);
-
- /* make sure we're done processing display irqs */
- synchronize_irq(dev_priv->drm.irq);
-
- intel_power_sequencer_reset(dev_priv);
-
- /* Prevent us from re-enabling polling on accident in late suspend */
- if (!dev_priv->drm.dev->power.is_suspended)
- intel_hpd_poll_init(dev_priv);
-}
-
-static void vlv_display_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- vlv_set_power_well(dev_priv, power_well, true);
-
- vlv_display_power_well_init(dev_priv);
-}
-
-static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- vlv_display_power_well_deinit(dev_priv);
-
- vlv_set_power_well(dev_priv, power_well, false);
-}
-
-static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- /* since ref/cri clock was enabled */
- udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
-
- vlv_set_power_well(dev_priv, power_well, true);
-
- /*
- * From VLV2A0_DP_eDP_DPIO_driver_vbios_notes_10.docx -
- * 6. De-assert cmn_reset/side_reset. Same as VLV X0.
- * a. GUnit 0x2110 bit[0] set to 1 (def 0)
- * b. The other bits such as sfr settings / modesel may all
- * be set to 0.
- *
- * This should only be done on init and resume from S3 with
- * both PLLs disabled, or we risk losing DPIO and PLL
- * synchronization.
- */
- I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) | DPIO_CMNRST);
-}
-
-static void vlv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- enum pipe pipe;
-
- for_each_pipe(dev_priv, pipe)
- assert_pll_disabled(dev_priv, pipe);
-
- /* Assert common reset */
- I915_WRITE(DPIO_CTL, I915_READ(DPIO_CTL) & ~DPIO_CMNRST);
-
- vlv_set_power_well(dev_priv, power_well, false);
-}
-
-#define POWER_DOMAIN_MASK (GENMASK_ULL(POWER_DOMAIN_NUM - 1, 0))
-
-#define BITS_SET(val, bits) (((val) & (bits)) == (bits))
-
-static void assert_chv_phy_status(struct drm_i915_private *dev_priv)
-{
- struct i915_power_well *cmn_bc =
- lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
- struct i915_power_well *cmn_d =
- lookup_power_well(dev_priv, CHV_DISP_PW_DPIO_CMN_D);
- u32 phy_control = dev_priv->chv_phy_control;
- u32 phy_status = 0;
- u32 phy_status_mask = 0xffffffff;
-
- /*
- * The BIOS can leave the PHY is some weird state
- * where it doesn't fully power down some parts.
- * Disable the asserts until the PHY has been fully
- * reset (ie. the power well has been disabled at
- * least once).
- */
- if (!dev_priv->chv_phy_assert[DPIO_PHY0])
- phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0) |
- PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0) |
- PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1) |
- PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1) |
- PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0) |
- PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1));
-
- if (!dev_priv->chv_phy_assert[DPIO_PHY1])
- phy_status_mask &= ~(PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0) |
- PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0) |
- PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1));
-
- if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
- phy_status |= PHY_POWERGOOD(DPIO_PHY0);
-
- /* this assumes override is only used to enable lanes */
- if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0)) == 0)
- phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0);
-
- if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1)) == 0)
- phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1);
-
- /* CL1 is on whenever anything is on in either channel */
- if (BITS_SET(phy_control,
- PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH0) |
- PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)))
- phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH0);
-
- /*
- * The DPLLB check accounts for the pipe B + port A usage
- * with CL2 powered up but all the lanes in the second channel
- * powered down.
- */
- if (BITS_SET(phy_control,
- PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY0, DPIO_CH1)) &&
- (I915_READ(DPLL(PIPE_B)) & DPLL_VCO_ENABLE) == 0)
- phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY0, DPIO_CH1);
-
- if (BITS_SET(phy_control,
- PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH0)))
- phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 0);
- if (BITS_SET(phy_control,
- PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH0)))
- phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH0, 1);
-
- if (BITS_SET(phy_control,
- PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY0, DPIO_CH1)))
- phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 0);
- if (BITS_SET(phy_control,
- PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY0, DPIO_CH1)))
- phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY0, DPIO_CH1, 1);
- }
-
- if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
- phy_status |= PHY_POWERGOOD(DPIO_PHY1);
-
- /* this assumes override is only used to enable lanes */
- if ((phy_control & PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0)) == 0)
- phy_control |= PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0);
-
- if (BITS_SET(phy_control,
- PHY_CH_POWER_DOWN_OVRD(0xf, DPIO_PHY1, DPIO_CH0)))
- phy_status |= PHY_STATUS_CMN_LDO(DPIO_PHY1, DPIO_CH0);
-
- if (BITS_SET(phy_control,
- PHY_CH_POWER_DOWN_OVRD(0x3, DPIO_PHY1, DPIO_CH0)))
- phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 0);
- if (BITS_SET(phy_control,
- PHY_CH_POWER_DOWN_OVRD(0xc, DPIO_PHY1, DPIO_CH0)))
- phy_status |= PHY_STATUS_SPLINE_LDO(DPIO_PHY1, DPIO_CH0, 1);
- }
-
- phy_status &= phy_status_mask;
-
- /*
- * The PHY may be busy with some initial calibration and whatnot,
- * so the power state can take a while to actually change.
- */
- if (intel_wait_for_register(&dev_priv->uncore,
- DISPLAY_PHY_STATUS,
- phy_status_mask,
- phy_status,
- 10))
- DRM_ERROR("Unexpected PHY_STATUS 0x%08x, expected 0x%08x (PHY_CONTROL=0x%08x)\n",
- I915_READ(DISPLAY_PHY_STATUS) & phy_status_mask,
- phy_status, dev_priv->chv_phy_control);
-}
-
-#undef BITS_SET
-
-static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- enum dpio_phy phy;
- enum pipe pipe;
- u32 tmp;
-
- WARN_ON_ONCE(power_well->desc->id != VLV_DISP_PW_DPIO_CMN_BC &&
- power_well->desc->id != CHV_DISP_PW_DPIO_CMN_D);
-
- if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
- pipe = PIPE_A;
- phy = DPIO_PHY0;
- } else {
- pipe = PIPE_C;
- phy = DPIO_PHY1;
- }
-
- /* since ref/cri clock was enabled */
- udelay(1); /* >10ns for cmnreset, >0ns for sidereset */
- vlv_set_power_well(dev_priv, power_well, true);
-
- /* Poll for phypwrgood signal */
- if (intel_wait_for_register(&dev_priv->uncore,
- DISPLAY_PHY_STATUS,
- PHY_POWERGOOD(phy),
- PHY_POWERGOOD(phy),
- 1))
- DRM_ERROR("Display PHY %d is not power up\n", phy);
-
- vlv_dpio_get(dev_priv);
-
- /* Enable dynamic power down */
- tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW28);
- tmp |= DPIO_DYNPWRDOWNEN_CH0 | DPIO_CL1POWERDOWNEN |
- DPIO_SUS_CLK_CONFIG_GATE_CLKREQ;
- vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW28, tmp);
-
- if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
- tmp = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW6_CH1);
- tmp |= DPIO_DYNPWRDOWNEN_CH1;
- vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW6_CH1, tmp);
- } else {
- /*
- * Force the non-existing CL2 off. BXT does this
- * too, so maybe it saves some power even though
- * CL2 doesn't exist?
- */
- tmp = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW30);
- tmp |= DPIO_CL2_LDOFUSE_PWRENB;
- vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW30, tmp);
- }
-
- vlv_dpio_put(dev_priv);
-
- dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(phy);
- I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
-
- DRM_DEBUG_KMS("Enabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n",
- phy, dev_priv->chv_phy_control);
-
- assert_chv_phy_status(dev_priv);
-}
-
-static void chv_dpio_cmn_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- enum dpio_phy phy;
-
- WARN_ON_ONCE(power_well->desc->id != VLV_DISP_PW_DPIO_CMN_BC &&
- power_well->desc->id != CHV_DISP_PW_DPIO_CMN_D);
-
- if (power_well->desc->id == VLV_DISP_PW_DPIO_CMN_BC) {
- phy = DPIO_PHY0;
- assert_pll_disabled(dev_priv, PIPE_A);
- assert_pll_disabled(dev_priv, PIPE_B);
- } else {
- phy = DPIO_PHY1;
- assert_pll_disabled(dev_priv, PIPE_C);
- }
-
- dev_priv->chv_phy_control &= ~PHY_COM_LANE_RESET_DEASSERT(phy);
- I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
-
- vlv_set_power_well(dev_priv, power_well, false);
-
- DRM_DEBUG_KMS("Disabled DPIO PHY%d (PHY_CONTROL=0x%08x)\n",
- phy, dev_priv->chv_phy_control);
-
- /* PHY is fully reset now, so we can enable the PHY state asserts */
- dev_priv->chv_phy_assert[phy] = true;
-
- assert_chv_phy_status(dev_priv);
-}
-
-static void assert_chv_phy_powergate(struct drm_i915_private *dev_priv, enum dpio_phy phy,
- enum dpio_channel ch, bool override, unsigned int mask)
-{
- enum pipe pipe = phy == DPIO_PHY0 ? PIPE_A : PIPE_C;
- u32 reg, val, expected, actual;
-
- /*
- * The BIOS can leave the PHY is some weird state
- * where it doesn't fully power down some parts.
- * Disable the asserts until the PHY has been fully
- * reset (ie. the power well has been disabled at
- * least once).
- */
- if (!dev_priv->chv_phy_assert[phy])
- return;
-
- if (ch == DPIO_CH0)
- reg = _CHV_CMN_DW0_CH0;
- else
- reg = _CHV_CMN_DW6_CH1;
-
- vlv_dpio_get(dev_priv);
- val = vlv_dpio_read(dev_priv, pipe, reg);
- vlv_dpio_put(dev_priv);
-
- /*
- * This assumes !override is only used when the port is disabled.
- * All lanes should power down even without the override when
- * the port is disabled.
- */
- if (!override || mask == 0xf) {
- expected = DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN;
- /*
- * If CH1 common lane is not active anymore
- * (eg. for pipe B DPLL) the entire channel will
- * shut down, which causes the common lane registers
- * to read as 0. That means we can't actually check
- * the lane power down status bits, but as the entire
- * register reads as 0 it's a good indication that the
- * channel is indeed entirely powered down.
- */
- if (ch == DPIO_CH1 && val == 0)
- expected = 0;
- } else if (mask != 0x0) {
- expected = DPIO_ANYDL_POWERDOWN;
- } else {
- expected = 0;
- }
-
- if (ch == DPIO_CH0)
- actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH0;
- else
- actual = val >> DPIO_ANYDL_POWERDOWN_SHIFT_CH1;
- actual &= DPIO_ALLDL_POWERDOWN | DPIO_ANYDL_POWERDOWN;
-
- WARN(actual != expected,
- "Unexpected DPIO lane power down: all %d, any %d. Expected: all %d, any %d. (0x%x = 0x%08x)\n",
- !!(actual & DPIO_ALLDL_POWERDOWN), !!(actual & DPIO_ANYDL_POWERDOWN),
- !!(expected & DPIO_ALLDL_POWERDOWN), !!(expected & DPIO_ANYDL_POWERDOWN),
- reg, val);
-}
-
-bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy,
- enum dpio_channel ch, bool override)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- bool was_override;
-
- mutex_lock(&power_domains->lock);
-
- was_override = dev_priv->chv_phy_control & PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
-
- if (override == was_override)
- goto out;
-
- if (override)
- dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
- else
- dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
-
- I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
-
- DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d (DPIO_PHY_CONTROL=0x%08x)\n",
- phy, ch, dev_priv->chv_phy_control);
-
- assert_chv_phy_status(dev_priv);
-
-out:
- mutex_unlock(&power_domains->lock);
-
- return was_override;
-}
-
-void chv_phy_powergate_lanes(struct intel_encoder *encoder,
- bool override, unsigned int mask)
-{
- struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- enum dpio_phy phy = vlv_dport_to_phy(enc_to_dig_port(&encoder->base));
- enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base));
-
- mutex_lock(&power_domains->lock);
-
- dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD(0xf, phy, ch);
- dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD(mask, phy, ch);
-
- if (override)
- dev_priv->chv_phy_control |= PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
- else
- dev_priv->chv_phy_control &= ~PHY_CH_POWER_DOWN_OVRD_EN(phy, ch);
-
- I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
-
- DRM_DEBUG_KMS("Power gating DPIO PHY%d CH%d lanes 0x%x (PHY_CONTROL=0x%08x)\n",
- phy, ch, mask, dev_priv->chv_phy_control);
-
- assert_chv_phy_status(dev_priv);
-
- assert_chv_phy_powergate(dev_priv, phy, ch, override, mask);
-
- mutex_unlock(&power_domains->lock);
-}
-
-static bool chv_pipe_power_well_enabled(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- enum pipe pipe = PIPE_A;
- bool enabled;
- u32 state, ctrl;
-
- vlv_punit_get(dev_priv);
-
- state = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSS_MASK(pipe);
- /*
- * We only ever set the power-on and power-gate states, anything
- * else is unexpected.
- */
- WARN_ON(state != DP_SSS_PWR_ON(pipe) && state != DP_SSS_PWR_GATE(pipe));
- enabled = state == DP_SSS_PWR_ON(pipe);
-
- /*
- * A transient state at this point would mean some unexpected party
- * is poking at the power controls too.
- */
- ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSC_MASK(pipe);
- WARN_ON(ctrl << 16 != state);
-
- vlv_punit_put(dev_priv);
-
- return enabled;
-}
-
-static void chv_set_pipe_power_well(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well,
- bool enable)
-{
- enum pipe pipe = PIPE_A;
- u32 state;
- u32 ctrl;
-
- state = enable ? DP_SSS_PWR_ON(pipe) : DP_SSS_PWR_GATE(pipe);
-
- vlv_punit_get(dev_priv);
-
-#define COND \
- ((vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM) & DP_SSS_MASK(pipe)) == state)
-
- if (COND)
- goto out;
-
- ctrl = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM);
- ctrl &= ~DP_SSC_MASK(pipe);
- ctrl |= enable ? DP_SSC_PWR_ON(pipe) : DP_SSC_PWR_GATE(pipe);
- vlv_punit_write(dev_priv, PUNIT_REG_DSPSSPM, ctrl);
-
- if (wait_for(COND, 100))
- DRM_ERROR("timeout setting power well state %08x (%08x)\n",
- state,
- vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM));
-
-#undef COND
-
-out:
- vlv_punit_put(dev_priv);
-}
-
-static void chv_pipe_power_well_enable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- chv_set_pipe_power_well(dev_priv, power_well, true);
-
- vlv_display_power_well_init(dev_priv);
-}
-
-static void chv_pipe_power_well_disable(struct drm_i915_private *dev_priv,
- struct i915_power_well *power_well)
-{
- vlv_display_power_well_deinit(dev_priv);
-
- chv_set_pipe_power_well(dev_priv, power_well, false);
-}
-
-static u64 __async_put_domains_mask(struct i915_power_domains *power_domains)
-{
- return power_domains->async_put_domains[0] |
- power_domains->async_put_domains[1];
-}
-
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
-
-static bool
-assert_async_put_domain_masks_disjoint(struct i915_power_domains *power_domains)
-{
- return !WARN_ON(power_domains->async_put_domains[0] &
- power_domains->async_put_domains[1]);
-}
-
-static bool
-__async_put_domains_state_ok(struct i915_power_domains *power_domains)
-{
- enum intel_display_power_domain domain;
- bool err = false;
-
- err |= !assert_async_put_domain_masks_disjoint(power_domains);
- err |= WARN_ON(!!power_domains->async_put_wakeref !=
- !!__async_put_domains_mask(power_domains));
-
- for_each_power_domain(domain, __async_put_domains_mask(power_domains))
- err |= WARN_ON(power_domains->domain_use_count[domain] != 1);
-
- return !err;
-}
-
-static void print_power_domains(struct i915_power_domains *power_domains,
- const char *prefix, u64 mask)
-{
- enum intel_display_power_domain domain;
-
- DRM_DEBUG_DRIVER("%s (%lu):\n", prefix, hweight64(mask));
- for_each_power_domain(domain, mask)
- DRM_DEBUG_DRIVER("%s use_count %d\n",
- intel_display_power_domain_str(domain),
- power_domains->domain_use_count[domain]);
-}
-
-static void
-print_async_put_domains_state(struct i915_power_domains *power_domains)
-{
- DRM_DEBUG_DRIVER("async_put_wakeref %u\n",
- power_domains->async_put_wakeref);
-
- print_power_domains(power_domains, "async_put_domains[0]",
- power_domains->async_put_domains[0]);
- print_power_domains(power_domains, "async_put_domains[1]",
- power_domains->async_put_domains[1]);
-}
-
-static void
-verify_async_put_domains_state(struct i915_power_domains *power_domains)
-{
- if (!__async_put_domains_state_ok(power_domains))
- print_async_put_domains_state(power_domains);
-}
-
-#else
-
-static void
-assert_async_put_domain_masks_disjoint(struct i915_power_domains *power_domains)
-{
-}
-
-static void
-verify_async_put_domains_state(struct i915_power_domains *power_domains)
-{
-}
-
-#endif /* CONFIG_DRM_I915_DEBUG_RUNTIME_PM */
-
-static u64 async_put_domains_mask(struct i915_power_domains *power_domains)
-{
- assert_async_put_domain_masks_disjoint(power_domains);
-
- return __async_put_domains_mask(power_domains);
-}
-
-static void
-async_put_domains_clear_domain(struct i915_power_domains *power_domains,
- enum intel_display_power_domain domain)
-{
- assert_async_put_domain_masks_disjoint(power_domains);
-
- power_domains->async_put_domains[0] &= ~BIT_ULL(domain);
- power_domains->async_put_domains[1] &= ~BIT_ULL(domain);
-}
-
-static bool
-intel_display_power_grab_async_put_ref(struct drm_i915_private *dev_priv,
- enum intel_display_power_domain domain)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- bool ret = false;
-
- if (!(async_put_domains_mask(power_domains) & BIT_ULL(domain)))
- goto out_verify;
-
- async_put_domains_clear_domain(power_domains, domain);
-
- ret = true;
-
- if (async_put_domains_mask(power_domains))
- goto out_verify;
-
- cancel_delayed_work(&power_domains->async_put_work);
- intel_runtime_pm_put_raw(dev_priv,
- fetch_and_zero(&power_domains->async_put_wakeref));
-out_verify:
- verify_async_put_domains_state(power_domains);
-
- return ret;
-}
-
-static void
-__intel_display_power_get_domain(struct drm_i915_private *dev_priv,
- enum intel_display_power_domain domain)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- struct i915_power_well *power_well;
-
- if (intel_display_power_grab_async_put_ref(dev_priv, domain))
- return;
-
- for_each_power_domain_well(dev_priv, power_well, BIT_ULL(domain))
- intel_power_well_get(dev_priv, power_well);
-
- power_domains->domain_use_count[domain]++;
-}
-
-/**
- * intel_display_power_get - grab a power domain reference
- * @dev_priv: i915 device instance
- * @domain: power domain to reference
- *
- * This function grabs a power domain reference for @domain and ensures that the
- * power domain and all its parents are powered up. Therefore users should only
- * grab a reference to the innermost power domain they need.
- *
- * Any power domain reference obtained by this function must have a symmetric
- * call to intel_display_power_put() to release the reference again.
- */
-intel_wakeref_t intel_display_power_get(struct drm_i915_private *dev_priv,
- enum intel_display_power_domain domain)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- intel_wakeref_t wakeref = intel_runtime_pm_get(dev_priv);
-
- mutex_lock(&power_domains->lock);
- __intel_display_power_get_domain(dev_priv, domain);
- mutex_unlock(&power_domains->lock);
-
- return wakeref;
-}
-
-/**
- * intel_display_power_get_if_enabled - grab a reference for an enabled display power domain
- * @dev_priv: i915 device instance
- * @domain: power domain to reference
- *
- * This function grabs a power domain reference for @domain and ensures that the
- * power domain and all its parents are powered up. Therefore users should only
- * grab a reference to the innermost power domain they need.
- *
- * Any power domain reference obtained by this function must have a symmetric
- * call to intel_display_power_put() to release the reference again.
- */
-intel_wakeref_t
-intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv,
- enum intel_display_power_domain domain)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- intel_wakeref_t wakeref;
- bool is_enabled;
-
- wakeref = intel_runtime_pm_get_if_in_use(dev_priv);
- if (!wakeref)
- return false;
-
- mutex_lock(&power_domains->lock);
-
- if (__intel_display_power_is_enabled(dev_priv, domain)) {
- __intel_display_power_get_domain(dev_priv, domain);
- is_enabled = true;
- } else {
- is_enabled = false;
- }
-
- mutex_unlock(&power_domains->lock);
-
- if (!is_enabled) {
- intel_runtime_pm_put(dev_priv, wakeref);
- wakeref = 0;
- }
-
- return wakeref;
-}
-
-static void
-__intel_display_power_put_domain(struct drm_i915_private *dev_priv,
- enum intel_display_power_domain domain)
-{
- struct i915_power_domains *power_domains;
- struct i915_power_well *power_well;
- const char *name = intel_display_power_domain_str(domain);
-
- power_domains = &dev_priv->power_domains;
-
- WARN(!power_domains->domain_use_count[domain],
- "Use count on domain %s is already zero\n",
- name);
- WARN(async_put_domains_mask(power_domains) & BIT_ULL(domain),
- "Async disabling of domain %s is pending\n",
- name);
-
- power_domains->domain_use_count[domain]--;
-
- for_each_power_domain_well_reverse(dev_priv, power_well, BIT_ULL(domain))
- intel_power_well_put(dev_priv, power_well);
-}
-
-static void __intel_display_power_put(struct drm_i915_private *dev_priv,
- enum intel_display_power_domain domain)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
-
- mutex_lock(&power_domains->lock);
- __intel_display_power_put_domain(dev_priv, domain);
- mutex_unlock(&power_domains->lock);
-}
-
-/**
- * intel_display_power_put_unchecked - release an unchecked power domain reference
- * @dev_priv: i915 device instance
- * @domain: power domain to reference
- *
- * This function drops the power domain reference obtained by
- * intel_display_power_get() and might power down the corresponding hardware
- * block right away if this is the last reference.
- *
- * This function exists only for historical reasons and should be avoided in
- * new code, as the correctness of its use cannot be checked. Always use
- * intel_display_power_put() instead.
- */
-void intel_display_power_put_unchecked(struct drm_i915_private *dev_priv,
- enum intel_display_power_domain domain)
-{
- __intel_display_power_put(dev_priv, domain);
- intel_runtime_pm_put_unchecked(dev_priv);
-}
-
-static void
-queue_async_put_domains_work(struct i915_power_domains *power_domains,
- intel_wakeref_t wakeref)
-{
- WARN_ON(power_domains->async_put_wakeref);
- power_domains->async_put_wakeref = wakeref;
- WARN_ON(!queue_delayed_work(system_unbound_wq,
- &power_domains->async_put_work,
- msecs_to_jiffies(100)));
-}
-
-static void
-release_async_put_domains(struct i915_power_domains *power_domains, u64 mask)
-{
- struct drm_i915_private *dev_priv =
- container_of(power_domains, struct drm_i915_private,
- power_domains);
- enum intel_display_power_domain domain;
- intel_wakeref_t wakeref;
-
- /*
- * The caller must hold already raw wakeref, upgrade that to a proper
- * wakeref to make the state checker happy about the HW access during
- * power well disabling.
- */
- assert_rpm_raw_wakeref_held(dev_priv);
- wakeref = intel_runtime_pm_get(dev_priv);
-
- for_each_power_domain(domain, mask) {
- /* Clear before put, so put's sanity check is happy. */
- async_put_domains_clear_domain(power_domains, domain);
- __intel_display_power_put_domain(dev_priv, domain);
- }
-
- intel_runtime_pm_put(dev_priv, wakeref);
-}
-
-static void
-intel_display_power_put_async_work(struct work_struct *work)
-{
- struct drm_i915_private *dev_priv =
- container_of(work, struct drm_i915_private,
- power_domains.async_put_work.work);
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- intel_wakeref_t new_work_wakeref = intel_runtime_pm_get_raw(dev_priv);
- intel_wakeref_t old_work_wakeref = 0;
-
- mutex_lock(&power_domains->lock);
-
- /*
- * Bail out if all the domain refs pending to be released were grabbed
- * by subsequent gets or a flush_work.
- */
- old_work_wakeref = fetch_and_zero(&power_domains->async_put_wakeref);
- if (!old_work_wakeref)
- goto out_verify;
-
- release_async_put_domains(power_domains,
- power_domains->async_put_domains[0]);
-
- /* Requeue the work if more domains were async put meanwhile. */
- if (power_domains->async_put_domains[1]) {
- power_domains->async_put_domains[0] =
- fetch_and_zero(&power_domains->async_put_domains[1]);
- queue_async_put_domains_work(power_domains,
- fetch_and_zero(&new_work_wakeref));
- }
-
-out_verify:
- verify_async_put_domains_state(power_domains);
-
- mutex_unlock(&power_domains->lock);
-
- if (old_work_wakeref)
- intel_runtime_pm_put_raw(dev_priv, old_work_wakeref);
- if (new_work_wakeref)
- intel_runtime_pm_put_raw(dev_priv, new_work_wakeref);
-}
-
-/**
- * intel_display_power_put_async - release a power domain reference asynchronously
- * @i915: i915 device instance
- * @domain: power domain to reference
- * @wakeref: wakeref acquired for the reference that is being released
- *
- * This function drops the power domain reference obtained by
- * intel_display_power_get*() and schedules a work to power down the
- * corresponding hardware block if this is the last reference.
- */
-void __intel_display_power_put_async(struct drm_i915_private *i915,
- enum intel_display_power_domain domain,
- intel_wakeref_t wakeref)
-{
- struct i915_power_domains *power_domains = &i915->power_domains;
- intel_wakeref_t work_wakeref = intel_runtime_pm_get_raw(i915);
-
- mutex_lock(&power_domains->lock);
-
- if (power_domains->domain_use_count[domain] > 1) {
- __intel_display_power_put_domain(i915, domain);
-
- goto out_verify;
- }
-
- WARN_ON(power_domains->domain_use_count[domain] != 1);
-
- /* Let a pending work requeue itself or queue a new one. */
- if (power_domains->async_put_wakeref) {
- power_domains->async_put_domains[1] |= BIT_ULL(domain);
- } else {
- power_domains->async_put_domains[0] |= BIT_ULL(domain);
- queue_async_put_domains_work(power_domains,
- fetch_and_zero(&work_wakeref));
- }
-
-out_verify:
- verify_async_put_domains_state(power_domains);
-
- mutex_unlock(&power_domains->lock);
-
- if (work_wakeref)
- intel_runtime_pm_put_raw(i915, work_wakeref);
-
- intel_runtime_pm_put(i915, wakeref);
-}
-
-/**
- * intel_display_power_flush_work - flushes the async display power disabling work
- * @i915: i915 device instance
- *
- * Flushes any pending work that was scheduled by a preceding
- * intel_display_power_put_async() call, completing the disabling of the
- * corresponding power domains.
- *
- * Note that the work handler function may still be running after this
- * function returns; to ensure that the work handler isn't running use
- * intel_display_power_flush_work_sync() instead.
- */
-void intel_display_power_flush_work(struct drm_i915_private *i915)
-{
- struct i915_power_domains *power_domains = &i915->power_domains;
- intel_wakeref_t work_wakeref;
-
- mutex_lock(&power_domains->lock);
-
- work_wakeref = fetch_and_zero(&power_domains->async_put_wakeref);
- if (!work_wakeref)
- goto out_verify;
-
- release_async_put_domains(power_domains,
- async_put_domains_mask(power_domains));
- cancel_delayed_work(&power_domains->async_put_work);
-
-out_verify:
- verify_async_put_domains_state(power_domains);
-
- mutex_unlock(&power_domains->lock);
-
- if (work_wakeref)
- intel_runtime_pm_put_raw(i915, work_wakeref);
-}
-
-/**
- * intel_display_power_flush_work_sync - flushes and syncs the async display power disabling work
- * @i915: i915 device instance
- *
- * Like intel_display_power_flush_work(), but also ensure that the work
- * handler function is not running any more when this function returns.
- */
-static void
-intel_display_power_flush_work_sync(struct drm_i915_private *i915)
-{
- struct i915_power_domains *power_domains = &i915->power_domains;
-
- intel_display_power_flush_work(i915);
- cancel_delayed_work_sync(&power_domains->async_put_work);
-
- verify_async_put_domains_state(power_domains);
-
- WARN_ON(power_domains->async_put_wakeref);
-}
-
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
-/**
- * intel_display_power_put - release a power domain reference
- * @dev_priv: i915 device instance
- * @domain: power domain to reference
- * @wakeref: wakeref acquired for the reference that is being released
- *
- * This function drops the power domain reference obtained by
- * intel_display_power_get() and might power down the corresponding hardware
- * block right away if this is the last reference.
- */
-void intel_display_power_put(struct drm_i915_private *dev_priv,
- enum intel_display_power_domain domain,
- intel_wakeref_t wakeref)
-{
- __intel_display_power_put(dev_priv, domain);
- intel_runtime_pm_put(dev_priv, wakeref);
-}
-#endif
-
-#define I830_PIPES_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PIPE_A) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B) | \
- BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define VLV_DISPLAY_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_DISPLAY_CORE) | \
- BIT_ULL(POWER_DOMAIN_PIPE_A) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B) | \
- BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DSI) | \
- BIT_ULL(POWER_DOMAIN_PORT_CRT) | \
- BIT_ULL(POWER_DOMAIN_VGA) | \
- BIT_ULL(POWER_DOMAIN_AUDIO) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_GMBUS) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define VLV_DPIO_CMN_BC_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_CRT) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define CHV_DISPLAY_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_DISPLAY_CORE) | \
- BIT_ULL(POWER_DOMAIN_PIPE_A) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C) | \
- BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DSI) | \
- BIT_ULL(POWER_DOMAIN_VGA) | \
- BIT_ULL(POWER_DOMAIN_AUDIO) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_AUX_D) | \
- BIT_ULL(POWER_DOMAIN_GMBUS) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define CHV_DPIO_CMN_BC_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define CHV_DPIO_CMN_D_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_D) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define HSW_DISPLAY_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PIPE_B) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C) | \
- BIT_ULL(POWER_DOMAIN_PIPE_A_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_CRT) | /* DDI E */ \
- BIT_ULL(POWER_DOMAIN_VGA) | \
- BIT_ULL(POWER_DOMAIN_AUDIO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define BDW_DISPLAY_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PIPE_B) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_CRT) | /* DDI E */ \
- BIT_ULL(POWER_DOMAIN_VGA) | \
- BIT_ULL(POWER_DOMAIN_AUDIO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_E_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_AUX_D) | \
- BIT_ULL(POWER_DOMAIN_AUDIO) | \
- BIT_ULL(POWER_DOMAIN_VGA) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define SKL_DISPLAY_DDI_IO_A_E_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define SKL_DISPLAY_DDI_IO_B_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define SKL_DISPLAY_DDI_IO_C_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define SKL_DISPLAY_DDI_IO_D_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define SKL_DISPLAY_DC_OFF_POWER_DOMAINS ( \
- SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
- BIT_ULL(POWER_DOMAIN_GT_IRQ) | \
- BIT_ULL(POWER_DOMAIN_MODESET) | \
- BIT_ULL(POWER_DOMAIN_AUX_A) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_AUDIO) | \
- BIT_ULL(POWER_DOMAIN_VGA) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define BXT_DISPLAY_DC_OFF_POWER_DOMAINS ( \
- BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
- BIT_ULL(POWER_DOMAIN_GT_IRQ) | \
- BIT_ULL(POWER_DOMAIN_MODESET) | \
- BIT_ULL(POWER_DOMAIN_AUX_A) | \
- BIT_ULL(POWER_DOMAIN_GMBUS) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define BXT_DPIO_CMN_A_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_A_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_A) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define BXT_DPIO_CMN_BC_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_AUDIO) | \
- BIT_ULL(POWER_DOMAIN_VGA) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define GLK_DISPLAY_DDI_IO_A_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO))
-#define GLK_DISPLAY_DDI_IO_B_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO))
-#define GLK_DISPLAY_DDI_IO_C_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO))
-#define GLK_DPIO_CMN_A_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_A_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_A) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define GLK_DPIO_CMN_B_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define GLK_DPIO_CMN_C_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define GLK_DISPLAY_AUX_A_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_A) | \
- BIT_ULL(POWER_DOMAIN_AUX_IO_A) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define GLK_DISPLAY_AUX_B_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define GLK_DISPLAY_AUX_C_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define GLK_DISPLAY_DC_OFF_POWER_DOMAINS ( \
- GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
- BIT_ULL(POWER_DOMAIN_GT_IRQ) | \
- BIT_ULL(POWER_DOMAIN_MODESET) | \
- BIT_ULL(POWER_DOMAIN_AUX_A) | \
- BIT_ULL(POWER_DOMAIN_GMBUS) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_F_LANES) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_AUX_D) | \
- BIT_ULL(POWER_DOMAIN_AUX_F) | \
- BIT_ULL(POWER_DOMAIN_AUDIO) | \
- BIT_ULL(POWER_DOMAIN_VGA) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_DDI_A_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_DDI_B_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_DDI_C_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_DDI_D_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_AUX_A_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_A) | \
- BIT_ULL(POWER_DOMAIN_AUX_IO_A) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_AUX_B_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_AUX_C_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_AUX_D_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_D) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_AUX_F_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_F) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_DDI_F_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-#define CNL_DISPLAY_DC_OFF_POWER_DOMAINS ( \
- CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS | \
- BIT_ULL(POWER_DOMAIN_GT_IRQ) | \
- BIT_ULL(POWER_DOMAIN_MODESET) | \
- BIT_ULL(POWER_DOMAIN_AUX_A) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-/*
- * ICL PW_0/PG_0 domains (HW/DMC control):
- * - PCI
- * - clocks except port PLL
- * - central power except FBC
- * - shared functions except pipe interrupts, pipe MBUS, DBUF registers
- * ICL PW_1/PG_1 domains (HW/DMC control):
- * - DBUF function
- * - PIPE_A and its planes, except VGA
- * - transcoder EDP + PSR
- * - transcoder DSI
- * - DDI_A
- * - FBC
- */
-#define ICL_PW_4_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PIPE_C) | \
- BIT_ULL(POWER_DOMAIN_PIPE_C_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_INIT))
- /* VDSC/joining */
-#define ICL_PW_3_POWER_DOMAINS ( \
- ICL_PW_4_POWER_DOMAINS | \
- BIT_ULL(POWER_DOMAIN_PIPE_B) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_A) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_B) | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_C) | \
- BIT_ULL(POWER_DOMAIN_PIPE_B_PANEL_FITTER) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_E_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_F_LANES) | \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO) | \
- BIT_ULL(POWER_DOMAIN_AUX_B) | \
- BIT_ULL(POWER_DOMAIN_AUX_C) | \
- BIT_ULL(POWER_DOMAIN_AUX_D) | \
- BIT_ULL(POWER_DOMAIN_AUX_E) | \
- BIT_ULL(POWER_DOMAIN_AUX_F) | \
- BIT_ULL(POWER_DOMAIN_AUX_TBT1) | \
- BIT_ULL(POWER_DOMAIN_AUX_TBT2) | \
- BIT_ULL(POWER_DOMAIN_AUX_TBT3) | \
- BIT_ULL(POWER_DOMAIN_AUX_TBT4) | \
- BIT_ULL(POWER_DOMAIN_VGA) | \
- BIT_ULL(POWER_DOMAIN_AUDIO) | \
- BIT_ULL(POWER_DOMAIN_INIT))
- /*
- * - transcoder WD
- * - KVMR (HW control)
- */
-#define ICL_PW_2_POWER_DOMAINS ( \
- ICL_PW_3_POWER_DOMAINS | \
- BIT_ULL(POWER_DOMAIN_TRANSCODER_EDP_VDSC) | \
- BIT_ULL(POWER_DOMAIN_INIT))
- /*
- * - KVMR (HW control)
- */
-#define ICL_DISPLAY_DC_OFF_POWER_DOMAINS ( \
- ICL_PW_2_POWER_DOMAINS | \
- BIT_ULL(POWER_DOMAIN_MODESET) | \
- BIT_ULL(POWER_DOMAIN_AUX_A) | \
- BIT_ULL(POWER_DOMAIN_INIT))
-
-#define ICL_DDI_IO_A_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_A_IO))
-#define ICL_DDI_IO_B_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_B_IO))
-#define ICL_DDI_IO_C_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_C_IO))
-#define ICL_DDI_IO_D_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_D_IO))
-#define ICL_DDI_IO_E_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_E_IO))
-#define ICL_DDI_IO_F_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_PORT_DDI_F_IO))
-
-#define ICL_AUX_A_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_IO_A) | \
- BIT_ULL(POWER_DOMAIN_AUX_A))
-#define ICL_AUX_B_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_B))
-#define ICL_AUX_C_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_C))
-#define ICL_AUX_D_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_D))
-#define ICL_AUX_E_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_E))
-#define ICL_AUX_F_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_F))
-#define ICL_AUX_TBT1_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_TBT1))
-#define ICL_AUX_TBT2_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_TBT2))
-#define ICL_AUX_TBT3_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_TBT3))
-#define ICL_AUX_TBT4_IO_POWER_DOMAINS ( \
- BIT_ULL(POWER_DOMAIN_AUX_TBT4))
-
-static const struct i915_power_well_ops i9xx_always_on_power_well_ops = {
- .sync_hw = i9xx_power_well_sync_hw_noop,
- .enable = i9xx_always_on_power_well_noop,
- .disable = i9xx_always_on_power_well_noop,
- .is_enabled = i9xx_always_on_power_well_enabled,
-};
-
-static const struct i915_power_well_ops chv_pipe_power_well_ops = {
- .sync_hw = i9xx_power_well_sync_hw_noop,
- .enable = chv_pipe_power_well_enable,
- .disable = chv_pipe_power_well_disable,
- .is_enabled = chv_pipe_power_well_enabled,
-};
-
-static const struct i915_power_well_ops chv_dpio_cmn_power_well_ops = {
- .sync_hw = i9xx_power_well_sync_hw_noop,
- .enable = chv_dpio_cmn_power_well_enable,
- .disable = chv_dpio_cmn_power_well_disable,
- .is_enabled = vlv_power_well_enabled,
-};
-
-static const struct i915_power_well_desc i9xx_always_on_power_well[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
-};
-
-static const struct i915_power_well_ops i830_pipes_power_well_ops = {
- .sync_hw = i830_pipes_power_well_sync_hw,
- .enable = i830_pipes_power_well_enable,
- .disable = i830_pipes_power_well_disable,
- .is_enabled = i830_pipes_power_well_enabled,
-};
-
-static const struct i915_power_well_desc i830_power_wells[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "pipes",
- .domains = I830_PIPES_POWER_DOMAINS,
- .ops = &i830_pipes_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
-};
-
-static const struct i915_power_well_ops hsw_power_well_ops = {
- .sync_hw = hsw_power_well_sync_hw,
- .enable = hsw_power_well_enable,
- .disable = hsw_power_well_disable,
- .is_enabled = hsw_power_well_enabled,
-};
-
-static const struct i915_power_well_ops gen9_dc_off_power_well_ops = {
- .sync_hw = i9xx_power_well_sync_hw_noop,
- .enable = gen9_dc_off_power_well_enable,
- .disable = gen9_dc_off_power_well_disable,
- .is_enabled = gen9_dc_off_power_well_enabled,
-};
-
-static const struct i915_power_well_ops bxt_dpio_cmn_power_well_ops = {
- .sync_hw = i9xx_power_well_sync_hw_noop,
- .enable = bxt_dpio_cmn_power_well_enable,
- .disable = bxt_dpio_cmn_power_well_disable,
- .is_enabled = bxt_dpio_cmn_power_well_enabled,
-};
-
-static const struct i915_power_well_regs hsw_power_well_regs = {
- .bios = HSW_PWR_WELL_CTL1,
- .driver = HSW_PWR_WELL_CTL2,
- .kvmr = HSW_PWR_WELL_CTL3,
- .debug = HSW_PWR_WELL_CTL4,
-};
-
-static const struct i915_power_well_desc hsw_power_wells[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "display",
- .domains = HSW_DISPLAY_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = HSW_DISP_PW_GLOBAL,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = HSW_PW_CTL_IDX_GLOBAL,
- .hsw.has_vga = true,
- },
- },
-};
-
-static const struct i915_power_well_desc bdw_power_wells[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "display",
- .domains = BDW_DISPLAY_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = HSW_DISP_PW_GLOBAL,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = HSW_PW_CTL_IDX_GLOBAL,
- .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
- .hsw.has_vga = true,
- },
- },
-};
-
-static const struct i915_power_well_ops vlv_display_power_well_ops = {
- .sync_hw = i9xx_power_well_sync_hw_noop,
- .enable = vlv_display_power_well_enable,
- .disable = vlv_display_power_well_disable,
- .is_enabled = vlv_power_well_enabled,
-};
-
-static const struct i915_power_well_ops vlv_dpio_cmn_power_well_ops = {
- .sync_hw = i9xx_power_well_sync_hw_noop,
- .enable = vlv_dpio_cmn_power_well_enable,
- .disable = vlv_dpio_cmn_power_well_disable,
- .is_enabled = vlv_power_well_enabled,
-};
-
-static const struct i915_power_well_ops vlv_dpio_power_well_ops = {
- .sync_hw = i9xx_power_well_sync_hw_noop,
- .enable = vlv_power_well_enable,
- .disable = vlv_power_well_disable,
- .is_enabled = vlv_power_well_enabled,
-};
-
-static const struct i915_power_well_desc vlv_power_wells[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "display",
- .domains = VLV_DISPLAY_POWER_DOMAINS,
- .ops = &vlv_display_power_well_ops,
- .id = VLV_DISP_PW_DISP2D,
- {
- .vlv.idx = PUNIT_PWGT_IDX_DISP2D,
- },
- },
- {
- .name = "dpio-tx-b-01",
- .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
- VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
- VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
- VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
- .ops = &vlv_dpio_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_B_LANES_01,
- },
- },
- {
- .name = "dpio-tx-b-23",
- .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
- VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
- VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
- VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
- .ops = &vlv_dpio_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_B_LANES_23,
- },
- },
- {
- .name = "dpio-tx-c-01",
- .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
- VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
- VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
- VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
- .ops = &vlv_dpio_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_C_LANES_01,
- },
- },
- {
- .name = "dpio-tx-c-23",
- .domains = VLV_DPIO_TX_B_LANES_01_POWER_DOMAINS |
- VLV_DPIO_TX_B_LANES_23_POWER_DOMAINS |
- VLV_DPIO_TX_C_LANES_01_POWER_DOMAINS |
- VLV_DPIO_TX_C_LANES_23_POWER_DOMAINS,
- .ops = &vlv_dpio_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .vlv.idx = PUNIT_PWGT_IDX_DPIO_TX_C_LANES_23,
- },
- },
- {
- .name = "dpio-common",
- .domains = VLV_DPIO_CMN_BC_POWER_DOMAINS,
- .ops = &vlv_dpio_cmn_power_well_ops,
- .id = VLV_DISP_PW_DPIO_CMN_BC,
- {
- .vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_BC,
- },
- },
-};
-
-static const struct i915_power_well_desc chv_power_wells[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "display",
- /*
- * Pipe A power well is the new disp2d well. Pipe B and C
- * power wells don't actually exist. Pipe A power well is
- * required for any pipe to work.
- */
- .domains = CHV_DISPLAY_POWER_DOMAINS,
- .ops = &chv_pipe_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "dpio-common-bc",
- .domains = CHV_DPIO_CMN_BC_POWER_DOMAINS,
- .ops = &chv_dpio_cmn_power_well_ops,
- .id = VLV_DISP_PW_DPIO_CMN_BC,
- {
- .vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_BC,
- },
- },
- {
- .name = "dpio-common-d",
- .domains = CHV_DPIO_CMN_D_POWER_DOMAINS,
- .ops = &chv_dpio_cmn_power_well_ops,
- .id = CHV_DISP_PW_DPIO_CMN_D,
- {
- .vlv.idx = PUNIT_PWGT_IDX_DPIO_CMN_D,
- },
- },
-};
-
-bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
- enum i915_power_well_id power_well_id)
-{
- struct i915_power_well *power_well;
- bool ret;
-
- power_well = lookup_power_well(dev_priv, power_well_id);
- ret = power_well->desc->ops->is_enabled(dev_priv, power_well);
-
- return ret;
-}
-
-static const struct i915_power_well_desc skl_power_wells[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "power well 1",
- /* Handled by the DMC firmware */
- .always_on = true,
- .domains = 0,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_1,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_PW_1,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "MISC IO power well",
- /* Handled by the DMC firmware */
- .always_on = true,
- .domains = 0,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_MISC_IO,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_MISC_IO,
- },
- },
- {
- .name = "DC off",
- .domains = SKL_DISPLAY_DC_OFF_POWER_DOMAINS,
- .ops = &gen9_dc_off_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "power well 2",
- .domains = SKL_DISPLAY_POWERWELL_2_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_2,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_PW_2,
- .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
- .hsw.has_vga = true,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "DDI A/E IO power well",
- .domains = SKL_DISPLAY_DDI_IO_A_E_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_DDI_A_E,
- },
- },
- {
- .name = "DDI B IO power well",
- .domains = SKL_DISPLAY_DDI_IO_B_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_DDI_B,
- },
- },
- {
- .name = "DDI C IO power well",
- .domains = SKL_DISPLAY_DDI_IO_C_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_DDI_C,
- },
- },
- {
- .name = "DDI D IO power well",
- .domains = SKL_DISPLAY_DDI_IO_D_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_DDI_D,
- },
- },
-};
-
-static const struct i915_power_well_desc bxt_power_wells[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "power well 1",
- /* Handled by the DMC firmware */
- .always_on = true,
- .domains = 0,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_1,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_PW_1,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "DC off",
- .domains = BXT_DISPLAY_DC_OFF_POWER_DOMAINS,
- .ops = &gen9_dc_off_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "power well 2",
- .domains = BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_2,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_PW_2,
- .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
- .hsw.has_vga = true,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "dpio-common-a",
- .domains = BXT_DPIO_CMN_A_POWER_DOMAINS,
- .ops = &bxt_dpio_cmn_power_well_ops,
- .id = BXT_DISP_PW_DPIO_CMN_A,
- {
- .bxt.phy = DPIO_PHY1,
- },
- },
- {
- .name = "dpio-common-bc",
- .domains = BXT_DPIO_CMN_BC_POWER_DOMAINS,
- .ops = &bxt_dpio_cmn_power_well_ops,
- .id = VLV_DISP_PW_DPIO_CMN_BC,
- {
- .bxt.phy = DPIO_PHY0,
- },
- },
-};
-
-static const struct i915_power_well_desc glk_power_wells[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "power well 1",
- /* Handled by the DMC firmware */
- .always_on = true,
- .domains = 0,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_1,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_PW_1,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "DC off",
- .domains = GLK_DISPLAY_DC_OFF_POWER_DOMAINS,
- .ops = &gen9_dc_off_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "power well 2",
- .domains = GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_2,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_PW_2,
- .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
- .hsw.has_vga = true,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "dpio-common-a",
- .domains = GLK_DPIO_CMN_A_POWER_DOMAINS,
- .ops = &bxt_dpio_cmn_power_well_ops,
- .id = BXT_DISP_PW_DPIO_CMN_A,
- {
- .bxt.phy = DPIO_PHY1,
- },
- },
- {
- .name = "dpio-common-b",
- .domains = GLK_DPIO_CMN_B_POWER_DOMAINS,
- .ops = &bxt_dpio_cmn_power_well_ops,
- .id = VLV_DISP_PW_DPIO_CMN_BC,
- {
- .bxt.phy = DPIO_PHY0,
- },
- },
- {
- .name = "dpio-common-c",
- .domains = GLK_DPIO_CMN_C_POWER_DOMAINS,
- .ops = &bxt_dpio_cmn_power_well_ops,
- .id = GLK_DISP_PW_DPIO_CMN_C,
- {
- .bxt.phy = DPIO_PHY2,
- },
- },
- {
- .name = "AUX A",
- .domains = GLK_DISPLAY_AUX_A_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = GLK_PW_CTL_IDX_AUX_A,
- },
- },
- {
- .name = "AUX B",
- .domains = GLK_DISPLAY_AUX_B_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = GLK_PW_CTL_IDX_AUX_B,
- },
- },
- {
- .name = "AUX C",
- .domains = GLK_DISPLAY_AUX_C_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = GLK_PW_CTL_IDX_AUX_C,
- },
- },
- {
- .name = "DDI A IO power well",
- .domains = GLK_DISPLAY_DDI_IO_A_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = GLK_PW_CTL_IDX_DDI_A,
- },
- },
- {
- .name = "DDI B IO power well",
- .domains = GLK_DISPLAY_DDI_IO_B_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_DDI_B,
- },
- },
- {
- .name = "DDI C IO power well",
- .domains = GLK_DISPLAY_DDI_IO_C_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_DDI_C,
- },
- },
-};
-
-static const struct i915_power_well_desc cnl_power_wells[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "power well 1",
- /* Handled by the DMC firmware */
- .always_on = true,
- .domains = 0,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_1,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_PW_1,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "AUX A",
- .domains = CNL_DISPLAY_AUX_A_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = GLK_PW_CTL_IDX_AUX_A,
- },
- },
- {
- .name = "AUX B",
- .domains = CNL_DISPLAY_AUX_B_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = GLK_PW_CTL_IDX_AUX_B,
- },
- },
- {
- .name = "AUX C",
- .domains = CNL_DISPLAY_AUX_C_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = GLK_PW_CTL_IDX_AUX_C,
- },
- },
- {
- .name = "AUX D",
- .domains = CNL_DISPLAY_AUX_D_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = CNL_PW_CTL_IDX_AUX_D,
- },
- },
- {
- .name = "DC off",
- .domains = CNL_DISPLAY_DC_OFF_POWER_DOMAINS,
- .ops = &gen9_dc_off_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "power well 2",
- .domains = CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_2,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_PW_2,
- .hsw.irq_pipe_mask = BIT(PIPE_B) | BIT(PIPE_C),
- .hsw.has_vga = true,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "DDI A IO power well",
- .domains = CNL_DISPLAY_DDI_A_IO_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = GLK_PW_CTL_IDX_DDI_A,
- },
- },
- {
- .name = "DDI B IO power well",
- .domains = CNL_DISPLAY_DDI_B_IO_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_DDI_B,
- },
- },
- {
- .name = "DDI C IO power well",
- .domains = CNL_DISPLAY_DDI_C_IO_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_DDI_C,
- },
- },
- {
- .name = "DDI D IO power well",
- .domains = CNL_DISPLAY_DDI_D_IO_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = SKL_PW_CTL_IDX_DDI_D,
- },
- },
- {
- .name = "DDI F IO power well",
- .domains = CNL_DISPLAY_DDI_F_IO_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = CNL_PW_CTL_IDX_DDI_F,
- },
- },
- {
- .name = "AUX F",
- .domains = CNL_DISPLAY_AUX_F_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = CNL_PW_CTL_IDX_AUX_F,
- },
- },
-};
-
-static const struct i915_power_well_ops icl_combo_phy_aux_power_well_ops = {
- .sync_hw = hsw_power_well_sync_hw,
- .enable = icl_combo_phy_aux_power_well_enable,
- .disable = icl_combo_phy_aux_power_well_disable,
- .is_enabled = hsw_power_well_enabled,
-};
-
-static const struct i915_power_well_ops icl_tc_phy_aux_power_well_ops = {
- .sync_hw = hsw_power_well_sync_hw,
- .enable = icl_tc_phy_aux_power_well_enable,
- .disable = hsw_power_well_disable,
- .is_enabled = hsw_power_well_enabled,
-};
-
-static const struct i915_power_well_regs icl_aux_power_well_regs = {
- .bios = ICL_PWR_WELL_CTL_AUX1,
- .driver = ICL_PWR_WELL_CTL_AUX2,
- .debug = ICL_PWR_WELL_CTL_AUX4,
-};
-
-static const struct i915_power_well_regs icl_ddi_power_well_regs = {
- .bios = ICL_PWR_WELL_CTL_DDI1,
- .driver = ICL_PWR_WELL_CTL_DDI2,
- .debug = ICL_PWR_WELL_CTL_DDI4,
-};
-
-static const struct i915_power_well_desc icl_power_wells[] = {
- {
- .name = "always-on",
- .always_on = true,
- .domains = POWER_DOMAIN_MASK,
- .ops = &i9xx_always_on_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "power well 1",
- /* Handled by the DMC firmware */
- .always_on = true,
- .domains = 0,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_1,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_PW_1,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "DC off",
- .domains = ICL_DISPLAY_DC_OFF_POWER_DOMAINS,
- .ops = &gen9_dc_off_power_well_ops,
- .id = DISP_PW_ID_NONE,
- },
- {
- .name = "power well 2",
- .domains = ICL_PW_2_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = SKL_DISP_PW_2,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_PW_2,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "power well 3",
- .domains = ICL_PW_3_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_PW_3,
- .hsw.irq_pipe_mask = BIT(PIPE_B),
- .hsw.has_vga = true,
- .hsw.has_fuses = true,
- },
- },
- {
- .name = "DDI A IO",
- .domains = ICL_DDI_IO_A_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_ddi_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_DDI_A,
- },
- },
- {
- .name = "DDI B IO",
- .domains = ICL_DDI_IO_B_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_ddi_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_DDI_B,
- },
- },
- {
- .name = "DDI C IO",
- .domains = ICL_DDI_IO_C_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_ddi_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_DDI_C,
- },
- },
- {
- .name = "DDI D IO",
- .domains = ICL_DDI_IO_D_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_ddi_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_DDI_D,
- },
- },
- {
- .name = "DDI E IO",
- .domains = ICL_DDI_IO_E_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_ddi_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_DDI_E,
- },
- },
- {
- .name = "DDI F IO",
- .domains = ICL_DDI_IO_F_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_ddi_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_DDI_F,
- },
- },
- {
- .name = "AUX A",
- .domains = ICL_AUX_A_IO_POWER_DOMAINS,
- .ops = &icl_combo_phy_aux_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_aux_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_AUX_A,
- },
- },
- {
- .name = "AUX B",
- .domains = ICL_AUX_B_IO_POWER_DOMAINS,
- .ops = &icl_combo_phy_aux_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_aux_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_AUX_B,
- },
- },
- {
- .name = "AUX C",
- .domains = ICL_AUX_C_IO_POWER_DOMAINS,
- .ops = &icl_tc_phy_aux_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_aux_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_AUX_C,
- .hsw.is_tc_tbt = false,
- },
- },
- {
- .name = "AUX D",
- .domains = ICL_AUX_D_IO_POWER_DOMAINS,
- .ops = &icl_tc_phy_aux_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_aux_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_AUX_D,
- .hsw.is_tc_tbt = false,
- },
- },
- {
- .name = "AUX E",
- .domains = ICL_AUX_E_IO_POWER_DOMAINS,
- .ops = &icl_tc_phy_aux_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_aux_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_AUX_E,
- .hsw.is_tc_tbt = false,
- },
- },
- {
- .name = "AUX F",
- .domains = ICL_AUX_F_IO_POWER_DOMAINS,
- .ops = &icl_tc_phy_aux_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_aux_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_AUX_F,
- .hsw.is_tc_tbt = false,
- },
- },
- {
- .name = "AUX TBT1",
- .domains = ICL_AUX_TBT1_IO_POWER_DOMAINS,
- .ops = &icl_tc_phy_aux_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_aux_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT1,
- .hsw.is_tc_tbt = true,
- },
- },
- {
- .name = "AUX TBT2",
- .domains = ICL_AUX_TBT2_IO_POWER_DOMAINS,
- .ops = &icl_tc_phy_aux_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_aux_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT2,
- .hsw.is_tc_tbt = true,
- },
- },
- {
- .name = "AUX TBT3",
- .domains = ICL_AUX_TBT3_IO_POWER_DOMAINS,
- .ops = &icl_tc_phy_aux_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_aux_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT3,
- .hsw.is_tc_tbt = true,
- },
- },
- {
- .name = "AUX TBT4",
- .domains = ICL_AUX_TBT4_IO_POWER_DOMAINS,
- .ops = &icl_tc_phy_aux_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &icl_aux_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_AUX_TBT4,
- .hsw.is_tc_tbt = true,
- },
- },
- {
- .name = "power well 4",
- .domains = ICL_PW_4_POWER_DOMAINS,
- .ops = &hsw_power_well_ops,
- .id = DISP_PW_ID_NONE,
- {
- .hsw.regs = &hsw_power_well_regs,
- .hsw.idx = ICL_PW_CTL_IDX_PW_4,
- .hsw.has_fuses = true,
- .hsw.irq_pipe_mask = BIT(PIPE_C),
- },
- },
-};
-
-static int
-sanitize_disable_power_well_option(const struct drm_i915_private *dev_priv,
- int disable_power_well)
-{
- if (disable_power_well >= 0)
- return !!disable_power_well;
-
- return 1;
-}
-
-static u32 get_allowed_dc_mask(const struct drm_i915_private *dev_priv,
- int enable_dc)
-{
- u32 mask;
- int requested_dc;
- int max_dc;
-
- if (INTEL_GEN(dev_priv) >= 11) {
- max_dc = 2;
- /*
- * DC9 has a separate HW flow from the rest of the DC states,
- * not depending on the DMC firmware. It's needed by system
- * suspend/resume, so allow it unconditionally.
- */
- mask = DC_STATE_EN_DC9;
- } else if (IS_GEN(dev_priv, 10) || IS_GEN9_BC(dev_priv)) {
- max_dc = 2;
- mask = 0;
- } else if (IS_GEN9_LP(dev_priv)) {
- max_dc = 1;
- mask = DC_STATE_EN_DC9;
- } else {
- max_dc = 0;
- mask = 0;
- }
-
- if (!i915_modparams.disable_power_well)
- max_dc = 0;
-
- if (enable_dc >= 0 && enable_dc <= max_dc) {
- requested_dc = enable_dc;
- } else if (enable_dc == -1) {
- requested_dc = max_dc;
- } else if (enable_dc > max_dc && enable_dc <= 2) {
- DRM_DEBUG_KMS("Adjusting requested max DC state (%d->%d)\n",
- enable_dc, max_dc);
- requested_dc = max_dc;
- } else {
- DRM_ERROR("Unexpected value for enable_dc (%d)\n", enable_dc);
- requested_dc = max_dc;
- }
-
- if (requested_dc > 1)
- mask |= DC_STATE_EN_UPTO_DC6;
- if (requested_dc > 0)
- mask |= DC_STATE_EN_UPTO_DC5;
-
- DRM_DEBUG_KMS("Allowed DC state mask %02x\n", mask);
-
- return mask;
-}
-
-static int
-__set_power_wells(struct i915_power_domains *power_domains,
- const struct i915_power_well_desc *power_well_descs,
- int power_well_count)
-{
- u64 power_well_ids = 0;
- int i;
-
- power_domains->power_well_count = power_well_count;
- power_domains->power_wells =
- kcalloc(power_well_count,
- sizeof(*power_domains->power_wells),
- GFP_KERNEL);
- if (!power_domains->power_wells)
- return -ENOMEM;
-
- for (i = 0; i < power_well_count; i++) {
- enum i915_power_well_id id = power_well_descs[i].id;
-
- power_domains->power_wells[i].desc = &power_well_descs[i];
-
- if (id == DISP_PW_ID_NONE)
- continue;
-
- WARN_ON(id >= sizeof(power_well_ids) * 8);
- WARN_ON(power_well_ids & BIT_ULL(id));
- power_well_ids |= BIT_ULL(id);
- }
-
- return 0;
-}
-
-#define set_power_wells(power_domains, __power_well_descs) \
- __set_power_wells(power_domains, __power_well_descs, \
- ARRAY_SIZE(__power_well_descs))
-
-/**
- * intel_power_domains_init - initializes the power domain structures
- * @dev_priv: i915 device instance
- *
- * Initializes the power domain structures for @dev_priv depending upon the
- * supported platform.
- */
-int intel_power_domains_init(struct drm_i915_private *dev_priv)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- int err;
-
- i915_modparams.disable_power_well =
- sanitize_disable_power_well_option(dev_priv,
- i915_modparams.disable_power_well);
- dev_priv->csr.allowed_dc_mask =
- get_allowed_dc_mask(dev_priv, i915_modparams.enable_dc);
-
- BUILD_BUG_ON(POWER_DOMAIN_NUM > 64);
-
- mutex_init(&power_domains->lock);
-
- INIT_DELAYED_WORK(&power_domains->async_put_work,
- intel_display_power_put_async_work);
-
- /*
- * The enabling order will be from lower to higher indexed wells,
- * the disabling order is reversed.
- */
- if (IS_GEN(dev_priv, 11)) {
- err = set_power_wells(power_domains, icl_power_wells);
- } else if (IS_CANNONLAKE(dev_priv)) {
- err = set_power_wells(power_domains, cnl_power_wells);
-
- /*
- * DDI and Aux IO are getting enabled for all ports
- * regardless the presence or use. So, in order to avoid
- * timeouts, lets remove them from the list
- * for the SKUs without port F.
- */
- if (!IS_CNL_WITH_PORT_F(dev_priv))
- power_domains->power_well_count -= 2;
- } else if (IS_GEMINILAKE(dev_priv)) {
- err = set_power_wells(power_domains, glk_power_wells);
- } else if (IS_BROXTON(dev_priv)) {
- err = set_power_wells(power_domains, bxt_power_wells);
- } else if (IS_GEN9_BC(dev_priv)) {
- err = set_power_wells(power_domains, skl_power_wells);
- } else if (IS_CHERRYVIEW(dev_priv)) {
- err = set_power_wells(power_domains, chv_power_wells);
- } else if (IS_BROADWELL(dev_priv)) {
- err = set_power_wells(power_domains, bdw_power_wells);
- } else if (IS_HASWELL(dev_priv)) {
- err = set_power_wells(power_domains, hsw_power_wells);
- } else if (IS_VALLEYVIEW(dev_priv)) {
- err = set_power_wells(power_domains, vlv_power_wells);
- } else if (IS_I830(dev_priv)) {
- err = set_power_wells(power_domains, i830_power_wells);
- } else {
- err = set_power_wells(power_domains, i9xx_always_on_power_well);
- }
-
- return err;
-}
-
-/**
- * intel_power_domains_cleanup - clean up power domains resources
- * @dev_priv: i915 device instance
- *
- * Release any resources acquired by intel_power_domains_init()
- */
-void intel_power_domains_cleanup(struct drm_i915_private *dev_priv)
-{
- kfree(dev_priv->power_domains.power_wells);
-}
-
-static void intel_power_domains_sync_hw(struct drm_i915_private *dev_priv)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- struct i915_power_well *power_well;
-
- mutex_lock(&power_domains->lock);
- for_each_power_well(dev_priv, power_well) {
- power_well->desc->ops->sync_hw(dev_priv, power_well);
- power_well->hw_enabled =
- power_well->desc->ops->is_enabled(dev_priv, power_well);
- }
- mutex_unlock(&power_domains->lock);
-}
-
-static inline
-bool intel_dbuf_slice_set(struct drm_i915_private *dev_priv,
- i915_reg_t reg, bool enable)
-{
- u32 val, status;
-
- val = I915_READ(reg);
- val = enable ? (val | DBUF_POWER_REQUEST) : (val & ~DBUF_POWER_REQUEST);
- I915_WRITE(reg, val);
- POSTING_READ(reg);
- udelay(10);
-
- status = I915_READ(reg) & DBUF_POWER_STATE;
- if ((enable && !status) || (!enable && status)) {
- DRM_ERROR("DBus power %s timeout!\n",
- enable ? "enable" : "disable");
- return false;
- }
- return true;
-}
-
-static void gen9_dbuf_enable(struct drm_i915_private *dev_priv)
-{
- intel_dbuf_slice_set(dev_priv, DBUF_CTL, true);
-}
-
-static void gen9_dbuf_disable(struct drm_i915_private *dev_priv)
-{
- intel_dbuf_slice_set(dev_priv, DBUF_CTL, false);
-}
-
-static u8 intel_dbuf_max_slices(struct drm_i915_private *dev_priv)
-{
- if (INTEL_GEN(dev_priv) < 11)
- return 1;
- return 2;
-}
-
-void icl_dbuf_slices_update(struct drm_i915_private *dev_priv,
- u8 req_slices)
-{
- const u8 hw_enabled_slices = dev_priv->wm.skl_hw.ddb.enabled_slices;
- bool ret;
-
- if (req_slices > intel_dbuf_max_slices(dev_priv)) {
- DRM_ERROR("Invalid number of dbuf slices requested\n");
- return;
- }
-
- if (req_slices == hw_enabled_slices || req_slices == 0)
- return;
-
- if (req_slices > hw_enabled_slices)
- ret = intel_dbuf_slice_set(dev_priv, DBUF_CTL_S2, true);
- else
- ret = intel_dbuf_slice_set(dev_priv, DBUF_CTL_S2, false);
-
- if (ret)
- dev_priv->wm.skl_hw.ddb.enabled_slices = req_slices;
-}
-
-static void icl_dbuf_enable(struct drm_i915_private *dev_priv)
-{
- I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) | DBUF_POWER_REQUEST);
- I915_WRITE(DBUF_CTL_S2, I915_READ(DBUF_CTL_S2) | DBUF_POWER_REQUEST);
- POSTING_READ(DBUF_CTL_S2);
-
- udelay(10);
-
- if (!(I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE) ||
- !(I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE))
- DRM_ERROR("DBuf power enable timeout\n");
- else
- /*
- * FIXME: for now pretend that we only have 1 slice, see
- * intel_enabled_dbuf_slices_num().
- */
- dev_priv->wm.skl_hw.ddb.enabled_slices = 1;
-}
-
-static void icl_dbuf_disable(struct drm_i915_private *dev_priv)
-{
- I915_WRITE(DBUF_CTL_S1, I915_READ(DBUF_CTL_S1) & ~DBUF_POWER_REQUEST);
- I915_WRITE(DBUF_CTL_S2, I915_READ(DBUF_CTL_S2) & ~DBUF_POWER_REQUEST);
- POSTING_READ(DBUF_CTL_S2);
-
- udelay(10);
-
- if ((I915_READ(DBUF_CTL_S1) & DBUF_POWER_STATE) ||
- (I915_READ(DBUF_CTL_S2) & DBUF_POWER_STATE))
- DRM_ERROR("DBuf power disable timeout!\n");
- else
- /*
- * FIXME: for now pretend that the first slice is always
- * enabled, see intel_enabled_dbuf_slices_num().
- */
- dev_priv->wm.skl_hw.ddb.enabled_slices = 1;
-}
-
-static void icl_mbus_init(struct drm_i915_private *dev_priv)
-{
- u32 val;
-
- val = MBUS_ABOX_BT_CREDIT_POOL1(16) |
- MBUS_ABOX_BT_CREDIT_POOL2(16) |
- MBUS_ABOX_B_CREDIT(1) |
- MBUS_ABOX_BW_CREDIT(1);
-
- I915_WRITE(MBUS_ABOX_CTL, val);
-}
-
-static void hsw_assert_cdclk(struct drm_i915_private *dev_priv)
-{
- u32 val = I915_READ(LCPLL_CTL);
-
- /*
- * The LCPLL register should be turned on by the BIOS. For now
- * let's just check its state and print errors in case
- * something is wrong. Don't even try to turn it on.
- */
-
- if (val & LCPLL_CD_SOURCE_FCLK)
- DRM_ERROR("CDCLK source is not LCPLL\n");
-
- if (val & LCPLL_PLL_DISABLE)
- DRM_ERROR("LCPLL is disabled\n");
-}
-
-static void assert_can_disable_lcpll(struct drm_i915_private *dev_priv)
-{
- struct drm_device *dev = &dev_priv->drm;
- struct intel_crtc *crtc;
-
- for_each_intel_crtc(dev, crtc)
- I915_STATE_WARN(crtc->active, "CRTC for pipe %c enabled\n",
- pipe_name(crtc->pipe));
-
- I915_STATE_WARN(I915_READ(HSW_PWR_WELL_CTL2),
- "Display power well on\n");
- I915_STATE_WARN(I915_READ(SPLL_CTL) & SPLL_PLL_ENABLE,
- "SPLL enabled\n");
- I915_STATE_WARN(I915_READ(WRPLL_CTL(0)) & WRPLL_PLL_ENABLE,
- "WRPLL1 enabled\n");
- I915_STATE_WARN(I915_READ(WRPLL_CTL(1)) & WRPLL_PLL_ENABLE,
- "WRPLL2 enabled\n");
- I915_STATE_WARN(I915_READ(PP_STATUS(0)) & PP_ON,
- "Panel power on\n");
- I915_STATE_WARN(I915_READ(BLC_PWM_CPU_CTL2) & BLM_PWM_ENABLE,
- "CPU PWM1 enabled\n");
- if (IS_HASWELL(dev_priv))
- I915_STATE_WARN(I915_READ(HSW_BLC_PWM2_CTL) & BLM_PWM_ENABLE,
- "CPU PWM2 enabled\n");
- I915_STATE_WARN(I915_READ(BLC_PWM_PCH_CTL1) & BLM_PCH_PWM_ENABLE,
- "PCH PWM1 enabled\n");
- I915_STATE_WARN(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,
- "Utility pin enabled\n");
- I915_STATE_WARN(I915_READ(PCH_GTC_CTL) & PCH_GTC_ENABLE,
- "PCH GTC enabled\n");
-
- /*
- * In theory we can still leave IRQs enabled, as long as only the HPD
- * interrupts remain enabled. We used to check for that, but since it's
- * gen-specific and since we only disable LCPLL after we fully disable
- * the interrupts, the check below should be enough.
- */
- I915_STATE_WARN(intel_irqs_enabled(dev_priv), "IRQs enabled\n");
-}
-
-static u32 hsw_read_dcomp(struct drm_i915_private *dev_priv)
-{
- if (IS_HASWELL(dev_priv))
- return I915_READ(D_COMP_HSW);
- else
- return I915_READ(D_COMP_BDW);
-}
-
-static void hsw_write_dcomp(struct drm_i915_private *dev_priv, u32 val)
-{
- if (IS_HASWELL(dev_priv)) {
- if (sandybridge_pcode_write(dev_priv,
- GEN6_PCODE_WRITE_D_COMP, val))
- DRM_DEBUG_KMS("Failed to write to D_COMP\n");
- } else {
- I915_WRITE(D_COMP_BDW, val);
- POSTING_READ(D_COMP_BDW);
- }
-}
-
-/*
- * This function implements pieces of two sequences from BSpec:
- * - Sequence for display software to disable LCPLL
- * - Sequence for display software to allow package C8+
- * The steps implemented here are just the steps that actually touch the LCPLL
- * register. Callers should take care of disabling all the display engine
- * functions, doing the mode unset, fixing interrupts, etc.
- */
-static void hsw_disable_lcpll(struct drm_i915_private *dev_priv,
- bool switch_to_fclk, bool allow_power_down)
-{
- u32 val;
-
- assert_can_disable_lcpll(dev_priv);
-
- val = I915_READ(LCPLL_CTL);
-
- if (switch_to_fclk) {
- val |= LCPLL_CD_SOURCE_FCLK;
- I915_WRITE(LCPLL_CTL, val);
-
- if (wait_for_us(I915_READ(LCPLL_CTL) &
- LCPLL_CD_SOURCE_FCLK_DONE, 1))
- DRM_ERROR("Switching to FCLK failed\n");
-
- val = I915_READ(LCPLL_CTL);
- }
-
- val |= LCPLL_PLL_DISABLE;
- I915_WRITE(LCPLL_CTL, val);
- POSTING_READ(LCPLL_CTL);
-
- if (intel_wait_for_register(&dev_priv->uncore, LCPLL_CTL,
- LCPLL_PLL_LOCK, 0, 1))
- DRM_ERROR("LCPLL still locked\n");
-
- val = hsw_read_dcomp(dev_priv);
- val |= D_COMP_COMP_DISABLE;
- hsw_write_dcomp(dev_priv, val);
- ndelay(100);
-
- if (wait_for((hsw_read_dcomp(dev_priv) &
- D_COMP_RCOMP_IN_PROGRESS) == 0, 1))
- DRM_ERROR("D_COMP RCOMP still in progress\n");
-
- if (allow_power_down) {
- val = I915_READ(LCPLL_CTL);
- val |= LCPLL_POWER_DOWN_ALLOW;
- I915_WRITE(LCPLL_CTL, val);
- POSTING_READ(LCPLL_CTL);
- }
-}
-
-/*
- * Fully restores LCPLL, disallowing power down and switching back to LCPLL
- * source.
- */
-static void hsw_restore_lcpll(struct drm_i915_private *dev_priv)
-{
- u32 val;
-
- val = I915_READ(LCPLL_CTL);
-
- if ((val & (LCPLL_PLL_LOCK | LCPLL_PLL_DISABLE | LCPLL_CD_SOURCE_FCLK |
- LCPLL_POWER_DOWN_ALLOW)) == LCPLL_PLL_LOCK)
- return;
-
- /*
- * Make sure we're not on PC8 state before disabling PC8, otherwise
- * we'll hang the machine. To prevent PC8 state, just enable force_wake.
- */
- intel_uncore_forcewake_get(&dev_priv->uncore, FORCEWAKE_ALL);
-
- if (val & LCPLL_POWER_DOWN_ALLOW) {
- val &= ~LCPLL_POWER_DOWN_ALLOW;
- I915_WRITE(LCPLL_CTL, val);
- POSTING_READ(LCPLL_CTL);
- }
-
- val = hsw_read_dcomp(dev_priv);
- val |= D_COMP_COMP_FORCE;
- val &= ~D_COMP_COMP_DISABLE;
- hsw_write_dcomp(dev_priv, val);
-
- val = I915_READ(LCPLL_CTL);
- val &= ~LCPLL_PLL_DISABLE;
- I915_WRITE(LCPLL_CTL, val);
-
- if (intel_wait_for_register(&dev_priv->uncore, LCPLL_CTL,
- LCPLL_PLL_LOCK, LCPLL_PLL_LOCK, 5))
- DRM_ERROR("LCPLL not locked yet\n");
-
- if (val & LCPLL_CD_SOURCE_FCLK) {
- val = I915_READ(LCPLL_CTL);
- val &= ~LCPLL_CD_SOURCE_FCLK;
- I915_WRITE(LCPLL_CTL, val);
-
- if (wait_for_us((I915_READ(LCPLL_CTL) &
- LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
- DRM_ERROR("Switching back to LCPLL failed\n");
- }
-
- intel_uncore_forcewake_put(&dev_priv->uncore, FORCEWAKE_ALL);
-
- intel_update_cdclk(dev_priv);
- intel_dump_cdclk_state(&dev_priv->cdclk.hw, "Current CDCLK");
-}
-
-/*
- * Package states C8 and deeper are really deep PC states that can only be
- * reached when all the devices on the system allow it, so even if the graphics
- * device allows PC8+, it doesn't mean the system will actually get to these
- * states. Our driver only allows PC8+ when going into runtime PM.
- *
- * The requirements for PC8+ are that all the outputs are disabled, the power
- * well is disabled and most interrupts are disabled, and these are also
- * requirements for runtime PM. When these conditions are met, we manually do
- * the other conditions: disable the interrupts, clocks and switch LCPLL refclk
- * to Fclk. If we're in PC8+ and we get an non-hotplug interrupt, we can hard
- * hang the machine.
- *
- * When we really reach PC8 or deeper states (not just when we allow it) we lose
- * the state of some registers, so when we come back from PC8+ we need to
- * restore this state. We don't get into PC8+ if we're not in RC6, so we don't
- * need to take care of the registers kept by RC6. Notice that this happens even
- * if we don't put the device in PCI D3 state (which is what currently happens
- * because of the runtime PM support).
- *
- * For more, read "Display Sequences for Package C8" on the hardware
- * documentation.
- */
-void hsw_enable_pc8(struct drm_i915_private *dev_priv)
-{
- u32 val;
-
- DRM_DEBUG_KMS("Enabling package C8+\n");
-
- if (HAS_PCH_LPT_LP(dev_priv)) {
- val = I915_READ(SOUTH_DSPCLK_GATE_D);
- val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
- I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
- }
-
- lpt_disable_clkout_dp(dev_priv);
- hsw_disable_lcpll(dev_priv, true, true);
-}
-
-void hsw_disable_pc8(struct drm_i915_private *dev_priv)
-{
- u32 val;
-
- DRM_DEBUG_KMS("Disabling package C8+\n");
-
- hsw_restore_lcpll(dev_priv);
- intel_init_pch_refclk(dev_priv);
-
- if (HAS_PCH_LPT_LP(dev_priv)) {
- val = I915_READ(SOUTH_DSPCLK_GATE_D);
- val |= PCH_LP_PARTITION_LEVEL_DISABLE;
- I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
- }
-}
-
-static void intel_pch_reset_handshake(struct drm_i915_private *dev_priv,
- bool enable)
-{
- i915_reg_t reg;
- u32 reset_bits, val;
-
- if (IS_IVYBRIDGE(dev_priv)) {
- reg = GEN7_MSG_CTL;
- reset_bits = WAIT_FOR_PCH_FLR_ACK | WAIT_FOR_PCH_RESET_ACK;
- } else {
- reg = HSW_NDE_RSTWRN_OPT;
- reset_bits = RESET_PCH_HANDSHAKE_ENABLE;
- }
-
- val = I915_READ(reg);
-
- if (enable)
- val |= reset_bits;
- else
- val &= ~reset_bits;
-
- I915_WRITE(reg, val);
-}
-
-static void skl_display_core_init(struct drm_i915_private *dev_priv,
- bool resume)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- struct i915_power_well *well;
-
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
-
- /* enable PCH reset handshake */
- intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
-
- /* enable PG1 and Misc I/O */
- mutex_lock(&power_domains->lock);
-
- well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
- intel_power_well_enable(dev_priv, well);
-
- well = lookup_power_well(dev_priv, SKL_DISP_PW_MISC_IO);
- intel_power_well_enable(dev_priv, well);
-
- mutex_unlock(&power_domains->lock);
-
- intel_cdclk_init(dev_priv);
-
- gen9_dbuf_enable(dev_priv);
-
- if (resume && dev_priv->csr.dmc_payload)
- intel_csr_load_program(dev_priv);
-}
-
-static void skl_display_core_uninit(struct drm_i915_private *dev_priv)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- struct i915_power_well *well;
-
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
-
- gen9_dbuf_disable(dev_priv);
-
- intel_cdclk_uninit(dev_priv);
-
- /* The spec doesn't call for removing the reset handshake flag */
- /* disable PG1 and Misc I/O */
-
- mutex_lock(&power_domains->lock);
-
- /*
- * BSpec says to keep the MISC IO power well enabled here, only
- * remove our request for power well 1.
- * Note that even though the driver's request is removed power well 1
- * may stay enabled after this due to DMC's own request on it.
- */
- well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
- intel_power_well_disable(dev_priv, well);
-
- mutex_unlock(&power_domains->lock);
-
- usleep_range(10, 30); /* 10 us delay per Bspec */
-}
-
-void bxt_display_core_init(struct drm_i915_private *dev_priv,
- bool resume)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- struct i915_power_well *well;
-
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
-
- /*
- * NDE_RSTWRN_OPT RST PCH Handshake En must always be 0b on BXT
- * or else the reset will hang because there is no PCH to respond.
- * Move the handshake programming to initialization sequence.
- * Previously was left up to BIOS.
- */
- intel_pch_reset_handshake(dev_priv, false);
-
- /* Enable PG1 */
- mutex_lock(&power_domains->lock);
-
- well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
- intel_power_well_enable(dev_priv, well);
-
- mutex_unlock(&power_domains->lock);
-
- intel_cdclk_init(dev_priv);
-
- gen9_dbuf_enable(dev_priv);
-
- if (resume && dev_priv->csr.dmc_payload)
- intel_csr_load_program(dev_priv);
-}
-
-void bxt_display_core_uninit(struct drm_i915_private *dev_priv)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- struct i915_power_well *well;
-
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
-
- gen9_dbuf_disable(dev_priv);
-
- intel_cdclk_uninit(dev_priv);
-
- /* The spec doesn't call for removing the reset handshake flag */
-
- /*
- * Disable PW1 (PG1).
- * Note that even though the driver's request is removed power well 1
- * may stay enabled after this due to DMC's own request on it.
- */
- mutex_lock(&power_domains->lock);
-
- well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
- intel_power_well_disable(dev_priv, well);
-
- mutex_unlock(&power_domains->lock);
-
- usleep_range(10, 30); /* 10 us delay per Bspec */
-}
-
-static void cnl_display_core_init(struct drm_i915_private *dev_priv, bool resume)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- struct i915_power_well *well;
-
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
-
- /* 1. Enable PCH Reset Handshake */
- intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
-
- /* 2-3. */
- intel_combo_phy_init(dev_priv);
-
- /*
- * 4. Enable Power Well 1 (PG1).
- * The AUX IO power wells will be enabled on demand.
- */
- mutex_lock(&power_domains->lock);
- well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
- intel_power_well_enable(dev_priv, well);
- mutex_unlock(&power_domains->lock);
-
- /* 5. Enable CD clock */
- intel_cdclk_init(dev_priv);
-
- /* 6. Enable DBUF */
- gen9_dbuf_enable(dev_priv);
-
- if (resume && dev_priv->csr.dmc_payload)
- intel_csr_load_program(dev_priv);
-}
-
-static void cnl_display_core_uninit(struct drm_i915_private *dev_priv)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- struct i915_power_well *well;
-
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
-
- /* 1. Disable all display engine functions -> aready done */
-
- /* 2. Disable DBUF */
- gen9_dbuf_disable(dev_priv);
-
- /* 3. Disable CD clock */
- intel_cdclk_uninit(dev_priv);
-
- /*
- * 4. Disable Power Well 1 (PG1).
- * The AUX IO power wells are toggled on demand, so they are already
- * disabled at this point.
- */
- mutex_lock(&power_domains->lock);
- well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
- intel_power_well_disable(dev_priv, well);
- mutex_unlock(&power_domains->lock);
-
- usleep_range(10, 30); /* 10 us delay per Bspec */
-
- /* 5. */
- intel_combo_phy_uninit(dev_priv);
-}
-
-void icl_display_core_init(struct drm_i915_private *dev_priv,
- bool resume)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- struct i915_power_well *well;
-
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
-
- /* 1. Enable PCH reset handshake. */
- intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
-
- /* 2. Initialize all combo phys */
- intel_combo_phy_init(dev_priv);
-
- /*
- * 3. Enable Power Well 1 (PG1).
- * The AUX IO power wells will be enabled on demand.
- */
- mutex_lock(&power_domains->lock);
- well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
- intel_power_well_enable(dev_priv, well);
- mutex_unlock(&power_domains->lock);
-
- /* 4. Enable CDCLK. */
- intel_cdclk_init(dev_priv);
-
- /* 5. Enable DBUF. */
- icl_dbuf_enable(dev_priv);
-
- /* 6. Setup MBUS. */
- icl_mbus_init(dev_priv);
-
- if (resume && dev_priv->csr.dmc_payload)
- intel_csr_load_program(dev_priv);
-}
-
-void icl_display_core_uninit(struct drm_i915_private *dev_priv)
-{
- struct i915_power_domains *power_domains = &dev_priv->power_domains;
- struct i915_power_well *well;
-
- gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
-
- /* 1. Disable all display engine functions -> aready done */
-
- /* 2. Disable DBUF */
- icl_dbuf_disable(dev_priv);
-
- /* 3. Disable CD clock */
- intel_cdclk_uninit(dev_priv);
-
- /*
- * 4. Disable Power Well 1 (PG1).
- * The AUX IO power wells are toggled on demand, so they are already
- * disabled at this point.
- */
- mutex_lock(&power_domains->lock);
- well = lookup_power_well(dev_priv, SKL_DISP_PW_1);
- intel_power_well_disable(dev_priv, well);
- mutex_unlock(&power_domains->lock);
-
- /* 5. */
- intel_combo_phy_uninit(dev_priv);
-}
-
-static void chv_phy_control_init(struct drm_i915_private *dev_priv)
-{
- struct i915_power_well *cmn_bc =
- lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
- struct i915_power_well *cmn_d =
- lookup_power_well(dev_priv, CHV_DISP_PW_DPIO_CMN_D);
-
- /*
- * DISPLAY_PHY_CONTROL can get corrupted if read. As a
- * workaround never ever read DISPLAY_PHY_CONTROL, and
- * instead maintain a shadow copy ourselves. Use the actual
- * power well state and lane status to reconstruct the
- * expected initial value.
- */
- dev_priv->chv_phy_control =
- PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY0) |
- PHY_LDO_SEQ_DELAY(PHY_LDO_DELAY_600NS, DPIO_PHY1) |
- PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH0) |
- PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY0, DPIO_CH1) |
- PHY_CH_POWER_MODE(PHY_CH_DEEP_PSR, DPIO_PHY1, DPIO_CH0);
-
- /*
- * If all lanes are disabled we leave the override disabled
- * with all power down bits cleared to match the state we
- * would use after disabling the port. Otherwise enable the
- * override and set the lane powerdown bits accding to the
- * current lane status.
- */
- if (cmn_bc->desc->ops->is_enabled(dev_priv, cmn_bc)) {
- u32 status = I915_READ(DPLL(PIPE_A));
- unsigned int mask;
-
- mask = status & DPLL_PORTB_READY_MASK;
- if (mask == 0xf)
- mask = 0x0;
- else
- dev_priv->chv_phy_control |=
- PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH0);
-
- dev_priv->chv_phy_control |=
- PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH0);
-
- mask = (status & DPLL_PORTC_READY_MASK) >> 4;
- if (mask == 0xf)
- mask = 0x0;
- else
- dev_priv->chv_phy_control |=
- PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY0, DPIO_CH1);
-
- dev_priv->chv_phy_control |=
- PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY0, DPIO_CH1);
-
- dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY0);
-
- dev_priv->chv_phy_assert[DPIO_PHY0] = false;
- } else {
- dev_priv->chv_phy_assert[DPIO_PHY0] = true;
- }
-
- if (cmn_d->desc->ops->is_enabled(dev_priv, cmn_d)) {
- u32 status = I915_READ(DPIO_PHY_STATUS);
- unsigned int mask;
-
- mask = status & DPLL_PORTD_READY_MASK;
-
- if (mask == 0xf)
- mask = 0x0;
- else
- dev_priv->chv_phy_control |=
- PHY_CH_POWER_DOWN_OVRD_EN(DPIO_PHY1, DPIO_CH0);
-
- dev_priv->chv_phy_control |=
- PHY_CH_POWER_DOWN_OVRD(mask, DPIO_PHY1, DPIO_CH0);
-
- dev_priv->chv_phy_control |= PHY_COM_LANE_RESET_DEASSERT(DPIO_PHY1);
-
- dev_priv->chv_phy_assert[DPIO_PHY1] = false;
- } else {
- dev_priv->chv_phy_assert[DPIO_PHY1] = true;
- }
-
- I915_WRITE(DISPLAY_PHY_CONTROL, dev_priv->chv_phy_control);
-
- DRM_DEBUG_KMS("Initial PHY_CONTROL=0x%08x\n",
- dev_priv->chv_phy_control);
-}
-
-static void vlv_cmnlane_wa(struct drm_i915_private *dev_priv)
-{
- struct i915_power_well *cmn =
- lookup_power_well(dev_priv, VLV_DISP_PW_DPIO_CMN_BC);
- struct i915_power_well *disp2d =
- lookup_power_well(dev_priv, VLV_DISP_PW_DISP2D);
-
- /* If the display might be already active skip this */
- if (cmn->desc->ops->is_enabled(dev_priv, cmn) &&
- disp2d->desc->ops->is_enabled(dev_priv, disp2d) &&
- I915_READ(DPIO_CTL) & DPIO_CMNRST)
- return;
-
- DRM_DEBUG_KMS("toggling display PHY side reset\n");
-
- /* cmnlane needs DPLL registers */
- disp2d->desc->ops->enable(dev_priv, disp2d);
-
- /*
- * From VLV2A0_DP_eDP_HDMI_DPIO_driver_vbios_notes_11.docx:
- * Need to assert and de-assert PHY SB reset by gating the
- * common lane power, then un-gating it.
- * Simply ungating isn't enough to reset the PHY enough to get
- * ports and lanes running.
- */
- cmn->desc->ops->disable(dev_priv, cmn);
-}
-
-static bool vlv_punit_is_power_gated(struct drm_i915_private *dev_priv, u32 reg0)
-{
- bool ret;
-
- vlv_punit_get(dev_priv);
- ret = (vlv_punit_read(dev_priv, reg0) & SSPM0_SSC_MASK) == SSPM0_SSC_PWR_GATE;
- vlv_punit_put(dev_priv);
-
- return ret;
-}
-
-static void assert_ved_power_gated(struct drm_i915_private *dev_priv)
-{
- WARN(!vlv_punit_is_power_gated(dev_priv, PUNIT_REG_VEDSSPM0),
- "VED not power gated\n");
-}
-
-static void assert_isp_power_gated(struct drm_i915_private *dev_priv)
-{
- static const struct pci_device_id isp_ids[] = {
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0f38)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x22b8)},
- {}
- };
-
- WARN(!pci_dev_present(isp_ids) &&
- !vlv_punit_is_power_gated(dev_priv, PUNIT_REG_ISPSSPM0),
- "ISP not power gated\n");
-}
-
-static void intel_power_domains_verify_state(struct drm_i915_private *dev_priv);
-
-/**
- * intel_power_domains_init_hw - initialize hardware power domain state
- * @i915: i915 device instance
- * @resume: Called from resume code paths or not
- *
- * This function initializes the hardware power domain state and enables all
- * power wells belonging to the INIT power domain. Power wells in other
- * domains (and not in the INIT domain) are referenced or disabled by
- * intel_modeset_readout_hw_state(). After that the reference count of each
- * power well must match its HW enabled state, see
- * intel_power_domains_verify_state().
- *
- * It will return with power domains disabled (to be enabled later by
- * intel_power_domains_enable()) and must be paired with
- * intel_power_domains_fini_hw().
- */
-void intel_power_domains_init_hw(struct drm_i915_private *i915, bool resume)
-{
- struct i915_power_domains *power_domains = &i915->power_domains;
-
- power_domains->initializing = true;
-
- if (INTEL_GEN(i915) >= 11) {
- icl_display_core_init(i915, resume);
- } else if (IS_CANNONLAKE(i915)) {
- cnl_display_core_init(i915, resume);
- } else if (IS_GEN9_BC(i915)) {
- skl_display_core_init(i915, resume);
- } else if (IS_GEN9_LP(i915)) {
- bxt_display_core_init(i915, resume);
- } else if (IS_CHERRYVIEW(i915)) {
- mutex_lock(&power_domains->lock);
- chv_phy_control_init(i915);
- mutex_unlock(&power_domains->lock);
- assert_isp_power_gated(i915);
- } else if (IS_VALLEYVIEW(i915)) {
- mutex_lock(&power_domains->lock);
- vlv_cmnlane_wa(i915);
- mutex_unlock(&power_domains->lock);
- assert_ved_power_gated(i915);
- assert_isp_power_gated(i915);
- } else if (IS_BROADWELL(i915) || IS_HASWELL(i915)) {
- hsw_assert_cdclk(i915);
- intel_pch_reset_handshake(i915, !HAS_PCH_NOP(i915));
- } else if (IS_IVYBRIDGE(i915)) {
- intel_pch_reset_handshake(i915, !HAS_PCH_NOP(i915));
- }
-
- /*
- * Keep all power wells enabled for any dependent HW access during
- * initialization and to make sure we keep BIOS enabled display HW
- * resources powered until display HW readout is complete. We drop
- * this reference in intel_power_domains_enable().
- */
- power_domains->wakeref =
- intel_display_power_get(i915, POWER_DOMAIN_INIT);
-
- /* Disable power support if the user asked so. */
- if (!i915_modparams.disable_power_well)
- intel_display_power_get(i915, POWER_DOMAIN_INIT);
- intel_power_domains_sync_hw(i915);
-
- power_domains->initializing = false;
-}
-
-/**
- * intel_power_domains_fini_hw - deinitialize hw power domain state
- * @i915: i915 device instance
- *
- * De-initializes the display power domain HW state. It also ensures that the
- * device stays powered up so that the driver can be reloaded.
- *
- * It must be called with power domains already disabled (after a call to
- * intel_power_domains_disable()) and must be paired with
- * intel_power_domains_init_hw().
- */
-void intel_power_domains_fini_hw(struct drm_i915_private *i915)
-{
- intel_wakeref_t wakeref __maybe_unused =
- fetch_and_zero(&i915->power_domains.wakeref);
-
- /* Remove the refcount we took to keep power well support disabled. */
- if (!i915_modparams.disable_power_well)
- intel_display_power_put_unchecked(i915, POWER_DOMAIN_INIT);
-
- intel_display_power_flush_work_sync(i915);
-
- intel_power_domains_verify_state(i915);
-
- /* Keep the power well enabled, but cancel its rpm wakeref. */
- intel_runtime_pm_put(i915, wakeref);
-}
-
-/**
- * intel_power_domains_enable - enable toggling of display power wells
- * @i915: i915 device instance
- *
- * Enable the ondemand enabling/disabling of the display power wells. Note that
- * power wells not belonging to POWER_DOMAIN_INIT are allowed to be toggled
- * only at specific points of the display modeset sequence, thus they are not
- * affected by the intel_power_domains_enable()/disable() calls. The purpose
- * of these function is to keep the rest of power wells enabled until the end
- * of display HW readout (which will acquire the power references reflecting
- * the current HW state).
- */
-void intel_power_domains_enable(struct drm_i915_private *i915)
-{
- intel_wakeref_t wakeref __maybe_unused =
- fetch_and_zero(&i915->power_domains.wakeref);
-
- intel_display_power_put(i915, POWER_DOMAIN_INIT, wakeref);
- intel_power_domains_verify_state(i915);
-}
-
-/**
- * intel_power_domains_disable - disable toggling of display power wells
- * @i915: i915 device instance
- *
- * Disable the ondemand enabling/disabling of the display power wells. See
- * intel_power_domains_enable() for which power wells this call controls.
- */
-void intel_power_domains_disable(struct drm_i915_private *i915)
-{
- struct i915_power_domains *power_domains = &i915->power_domains;
-
- WARN_ON(power_domains->wakeref);
- power_domains->wakeref =
- intel_display_power_get(i915, POWER_DOMAIN_INIT);
-
- intel_power_domains_verify_state(i915);
-}
-
-/**
- * intel_power_domains_suspend - suspend power domain state
- * @i915: i915 device instance
- * @suspend_mode: specifies the target suspend state (idle, mem, hibernation)
- *
- * This function prepares the hardware power domain state before entering
- * system suspend.
- *
- * It must be called with power domains already disabled (after a call to
- * intel_power_domains_disable()) and paired with intel_power_domains_resume().
- */
-void intel_power_domains_suspend(struct drm_i915_private *i915,
- enum i915_drm_suspend_mode suspend_mode)
-{
- struct i915_power_domains *power_domains = &i915->power_domains;
- intel_wakeref_t wakeref __maybe_unused =
- fetch_and_zero(&power_domains->wakeref);
-
- intel_display_power_put(i915, POWER_DOMAIN_INIT, wakeref);
-
- /*
- * In case of suspend-to-idle (aka S0ix) on a DMC platform without DC9
- * support don't manually deinit the power domains. This also means the
- * CSR/DMC firmware will stay active, it will power down any HW
- * resources as required and also enable deeper system power states
- * that would be blocked if the firmware was inactive.
- */
- if (!(i915->csr.allowed_dc_mask & DC_STATE_EN_DC9) &&
- suspend_mode == I915_DRM_SUSPEND_IDLE &&
- i915->csr.dmc_payload) {
- intel_display_power_flush_work(i915);
- intel_power_domains_verify_state(i915);
- return;
- }
-
- /*
- * Even if power well support was disabled we still want to disable
- * power wells if power domains must be deinitialized for suspend.
- */
- if (!i915_modparams.disable_power_well)
- intel_display_power_put_unchecked(i915, POWER_DOMAIN_INIT);
-
- intel_display_power_flush_work(i915);
- intel_power_domains_verify_state(i915);
-
- if (INTEL_GEN(i915) >= 11)
- icl_display_core_uninit(i915);
- else if (IS_CANNONLAKE(i915))
- cnl_display_core_uninit(i915);
- else if (IS_GEN9_BC(i915))
- skl_display_core_uninit(i915);
- else if (IS_GEN9_LP(i915))
- bxt_display_core_uninit(i915);
-
- power_domains->display_core_suspended = true;
-}
-
-/**
- * intel_power_domains_resume - resume power domain state
- * @i915: i915 device instance
- *
- * This function resume the hardware power domain state during system resume.
- *
- * It will return with power domain support disabled (to be enabled later by
- * intel_power_domains_enable()) and must be paired with
- * intel_power_domains_suspend().
- */
-void intel_power_domains_resume(struct drm_i915_private *i915)
-{
- struct i915_power_domains *power_domains = &i915->power_domains;
-
- if (power_domains->display_core_suspended) {
- intel_power_domains_init_hw(i915, true);
- power_domains->display_core_suspended = false;
- } else {
- WARN_ON(power_domains->wakeref);
- power_domains->wakeref =
- intel_display_power_get(i915, POWER_DOMAIN_INIT);
- }
-
- intel_power_domains_verify_state(i915);
-}
-
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
-
-static void intel_power_domains_dump_info(struct drm_i915_private *i915)
-{
- struct i915_power_domains *power_domains = &i915->power_domains;
- struct i915_power_well *power_well;
-
- for_each_power_well(i915, power_well) {
- enum intel_display_power_domain domain;
-
- DRM_DEBUG_DRIVER("%-25s %d\n",
- power_well->desc->name, power_well->count);
-
- for_each_power_domain(domain, power_well->desc->domains)
- DRM_DEBUG_DRIVER(" %-23s %d\n",
- intel_display_power_domain_str(domain),
- power_domains->domain_use_count[domain]);
- }
-}
-
-/**
- * intel_power_domains_verify_state - verify the HW/SW state for all power wells
- * @i915: i915 device instance
- *
- * Verify if the reference count of each power well matches its HW enabled
- * state and the total refcount of the domains it belongs to. This must be
- * called after modeset HW state sanitization, which is responsible for
- * acquiring reference counts for any power wells in use and disabling the
- * ones left on by BIOS but not required by any active output.
- */
-static void intel_power_domains_verify_state(struct drm_i915_private *i915)
-{
- struct i915_power_domains *power_domains = &i915->power_domains;
- struct i915_power_well *power_well;
- bool dump_domain_info;
-
- mutex_lock(&power_domains->lock);
-
- verify_async_put_domains_state(power_domains);
-
- dump_domain_info = false;
- for_each_power_well(i915, power_well) {
- enum intel_display_power_domain domain;
- int domains_count;
- bool enabled;
-
- enabled = power_well->desc->ops->is_enabled(i915, power_well);
- if ((power_well->count || power_well->desc->always_on) !=
- enabled)
- DRM_ERROR("power well %s state mismatch (refcount %d/enabled %d)",
- power_well->desc->name,
- power_well->count, enabled);
-
- domains_count = 0;
- for_each_power_domain(domain, power_well->desc->domains)
- domains_count += power_domains->domain_use_count[domain];
-
- if (power_well->count != domains_count) {
- DRM_ERROR("power well %s refcount/domain refcount mismatch "
- "(refcount %d/domains refcount %d)\n",
- power_well->desc->name, power_well->count,
- domains_count);
- dump_domain_info = true;
- }
- }
-
- if (dump_domain_info) {
- static bool dumped;
-
- if (!dumped) {
- intel_power_domains_dump_info(i915);
- dumped = true;
- }
- }
-
- mutex_unlock(&power_domains->lock);
-}
-
-#else
-
-static void intel_power_domains_verify_state(struct drm_i915_private *i915)
-{
-}
-
-#endif
-
-static intel_wakeref_t __intel_runtime_pm_get(struct drm_i915_private *i915,
- bool wakelock)
-{
- struct pci_dev *pdev = i915->drm.pdev;
- struct device *kdev = &pdev->dev;
- int ret;
-
- ret = pm_runtime_get_sync(kdev);
- WARN_ONCE(ret < 0, "pm_runtime_get_sync() failed: %d\n", ret);
-
- intel_runtime_pm_acquire(i915, wakelock);
-
- return track_intel_runtime_pm_wakeref(i915);
-}
-
-static intel_wakeref_t intel_runtime_pm_get_raw(struct drm_i915_private *i915)
-{
- return __intel_runtime_pm_get(i915, false);
-}
-
-/**
- * intel_runtime_pm_get - grab a runtime pm reference
- * @i915: i915 device instance
- *
- * This function grabs a device-level runtime pm reference (mostly used for GEM
- * code to ensure the GTT or GT is on) and ensures that it is powered up.
- *
- * Any runtime pm reference obtained by this function must have a symmetric
- * call to intel_runtime_pm_put() to release the reference again.
- *
- * Returns: the wakeref cookie to pass to intel_runtime_pm_put()
- */
-intel_wakeref_t intel_runtime_pm_get(struct drm_i915_private *i915)
-{
- return __intel_runtime_pm_get(i915, true);
-}
-
-/**
- * intel_runtime_pm_get_if_in_use - grab a runtime pm reference if device in use
- * @i915: i915 device instance
- *
- * This function grabs a device-level runtime pm reference if the device is
- * already in use and ensures that it is powered up. It is illegal to try
- * and access the HW should intel_runtime_pm_get_if_in_use() report failure.
- *
- * Any runtime pm reference obtained by this function must have a symmetric
- * call to intel_runtime_pm_put() to release the reference again.
- *
- * Returns: the wakeref cookie to pass to intel_runtime_pm_put(), evaluates
- * as True if the wakeref was acquired, or False otherwise.
- */
-intel_wakeref_t intel_runtime_pm_get_if_in_use(struct drm_i915_private *i915)
-{
- if (IS_ENABLED(CONFIG_PM)) {
- struct pci_dev *pdev = i915->drm.pdev;
- struct device *kdev = &pdev->dev;
-
- /*
- * In cases runtime PM is disabled by the RPM core and we get
- * an -EINVAL return value we are not supposed to call this
- * function, since the power state is undefined. This applies
- * atm to the late/early system suspend/resume handlers.
- */
- if (pm_runtime_get_if_in_use(kdev) <= 0)
- return 0;
- }
-
- intel_runtime_pm_acquire(i915, true);
-
- return track_intel_runtime_pm_wakeref(i915);
-}
-
-/**
- * intel_runtime_pm_get_noresume - grab a runtime pm reference
- * @i915: i915 device instance
- *
- * This function grabs a device-level runtime pm reference (mostly used for GEM
- * code to ensure the GTT or GT is on).
- *
- * It will _not_ power up the device but instead only check that it's powered
- * on. Therefore it is only valid to call this functions from contexts where
- * the device is known to be powered up and where trying to power it up would
- * result in hilarity and deadlocks. That pretty much means only the system
- * suspend/resume code where this is used to grab runtime pm references for
- * delayed setup down in work items.
- *
- * Any runtime pm reference obtained by this function must have a symmetric
- * call to intel_runtime_pm_put() to release the reference again.
- *
- * Returns: the wakeref cookie to pass to intel_runtime_pm_put()
- */
-intel_wakeref_t intel_runtime_pm_get_noresume(struct drm_i915_private *i915)
-{
- struct pci_dev *pdev = i915->drm.pdev;
- struct device *kdev = &pdev->dev;
-
- assert_rpm_wakelock_held(i915);
- pm_runtime_get_noresume(kdev);
-
- intel_runtime_pm_acquire(i915, true);
-
- return track_intel_runtime_pm_wakeref(i915);
-}
-
-static void __intel_runtime_pm_put(struct drm_i915_private *i915,
- intel_wakeref_t wref,
- bool wakelock)
-{
- struct pci_dev *pdev = i915->drm.pdev;
- struct device *kdev = &pdev->dev;
-
- untrack_intel_runtime_pm_wakeref(i915, wref);
-
- intel_runtime_pm_release(i915, wakelock);
-
- pm_runtime_mark_last_busy(kdev);
- pm_runtime_put_autosuspend(kdev);
-}
-
-#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
-static void
-intel_runtime_pm_put_raw(struct drm_i915_private *i915, intel_wakeref_t wref)
-{
- __intel_runtime_pm_put(i915, wref, false);
-}
-#endif
-
/**
* intel_runtime_pm_put_unchecked - release an unchecked runtime pm reference
* @i915: i915 device instance
projects / kernel.git / commitdiff