return &dev_priv->power_domains.power_wells[0];
}
+/**
+ * intel_display_power_set_target_dc_state - Set target dc state.
+ * @dev_priv: i915 device
+ * @state: state which needs to be set as target_dc_state.
+ *
+ * This function set the "DC off" power well target_dc_state,
+ * based upon this target_dc_stste, "DC off" power well will
+ * enable desired DC state.
+ */
+void intel_display_power_set_target_dc_state(struct drm_i915_private *dev_priv,
+ u32 state)
+{
+ struct i915_power_well *power_well;
+ bool dc_off_enabled;
+ struct i915_power_domains *power_domains = &dev_priv->power_domains;
+
+ mutex_lock(&power_domains->lock);
+ power_well = lookup_power_well(dev_priv, SKL_DISP_DC_OFF);
+
+ if (WARN_ON(!power_well))
+ goto unlock;
+
+ state = sanitize_target_dc_state(dev_priv, state);
+
+ if (state == dev_priv->csr.target_dc_state)
+ goto unlock;
+
+ dc_off_enabled = power_well->desc->ops->is_enabled(dev_priv,
+ power_well);
+ /*
+ * If DC off power well is disabled, need to enable and disable the
+ * DC off power well to effect target DC state.
+ */
+ if (!dc_off_enabled)
+ power_well->desc->ops->enable(dev_priv, power_well);
+
+ dev_priv->csr.target_dc_state = state;
+
+ if (!dc_off_enabled)
+ power_well->desc->ops->disable(dev_priv, power_well);
+
+unlock:
+ mutex_unlock(&power_domains->lock);
+}
+
static void assert_can_enable_dc5(struct drm_i915_private *dev_priv)
{
bool pg2_enabled = intel_display_power_well_is_enabled(dev_priv,
return trans == TRANSCODER_EDP;
}
+static u32 intel_get_frame_time_us(const struct intel_crtc_state *cstate)
+{
+ if (!cstate || !cstate->base.active)
+ return 0;
+
+ return DIV_ROUND_UP(1000 * 1000,
+ drm_mode_vrefresh(&cstate->base.adjusted_mode));
+}
+
+static void psr2_program_idle_frames(struct drm_i915_private *dev_priv,
+ u32 idle_frames)
+{
+ u32 val;
+
+ idle_frames <<= EDP_PSR2_IDLE_FRAME_SHIFT;
+ val = I915_READ(EDP_PSR2_CTL(dev_priv->psr.transcoder));
+ val &= ~EDP_PSR2_IDLE_FRAME_MASK;
+ val |= idle_frames;
+ I915_WRITE(EDP_PSR2_CTL(dev_priv->psr.transcoder), val);
+}
+
+static void tgl_psr2_enable_dc3co(struct drm_i915_private *dev_priv)
+{
+ psr2_program_idle_frames(dev_priv, 0);
+ intel_display_power_set_target_dc_state(dev_priv, DC_STATE_EN_DC3CO);
+}
+
+static void tgl_psr2_disable_dc3co(struct drm_i915_private *dev_priv)
+{
+ int idle_frames;
+
+ intel_display_power_set_target_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6);
+ /*
+ * Restore PSR2 idle frame let's use 6 as the minimum to cover all known
+ * cases including the off-by-one issue that HW has in some cases.
+ */
+ idle_frames = max(6, dev_priv->vbt.psr.idle_frames);
+ idle_frames = max(idle_frames, dev_priv->psr.sink_sync_latency + 1);
+ psr2_program_idle_frames(dev_priv, idle_frames);
+}
+
+static void tgl_dc5_idle_thread(struct work_struct *work)
+{
+ struct drm_i915_private *dev_priv =
+ container_of(work, typeof(*dev_priv), psr.idle_work.work);
+
+ mutex_lock(&dev_priv->psr.lock);
+ /* If delayed work is pending, it is not idle */
+ if (delayed_work_pending(&dev_priv->psr.idle_work))
+ goto unlock;
+
+ DRM_DEBUG_KMS("DC5/6 idle thread\n");
+ tgl_psr2_disable_dc3co(dev_priv);
+unlock:
+ mutex_unlock(&dev_priv->psr.lock);
+}
+
+static void tgl_disallow_dc3co_on_psr2_exit(struct drm_i915_private *dev_priv)
+{
+ if (!dev_priv->psr.dc3co_enabled)
+ return;
+
+ cancel_delayed_work(&dev_priv->psr.idle_work);
+ /* Before PSR2 exit disallow dc3co*/
+ tgl_psr2_disable_dc3co(dev_priv);
+}
+
static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
struct intel_crtc_state *crtc_state)
{
dev_priv->psr.psr2_enabled = intel_psr2_enabled(dev_priv, crtc_state);
dev_priv->psr.busy_frontbuffer_bits = 0;
dev_priv->psr.pipe = to_intel_crtc(crtc_state->base.crtc)->pipe;
+ dev_priv->psr.dc3co_enabled = !!crtc_state->dc3co_exitline;
+ dev_priv->psr.dc3co_exit_delay = intel_get_frame_time_us(crtc_state);
dev_priv->psr.transcoder = crtc_state->cpu_transcoder;
/*
}
if (dev_priv->psr.psr2_enabled) {
+ tgl_disallow_dc3co_on_psr2_exit(dev_priv);
val = I915_READ(EDP_PSR2_CTL(dev_priv->psr.transcoder));
WARN_ON(!(val & EDP_PSR2_ENABLE));
val &= ~EDP_PSR2_ENABLE;
mutex_unlock(&dev_priv->psr.lock);
cancel_work_sync(&dev_priv->psr.work);
+ cancel_delayed_work_sync(&dev_priv->psr.idle_work);
}
static void psr_force_hw_tracking_exit(struct drm_i915_private *dev_priv)
mutex_unlock(&dev_priv->psr.lock);
}
+/*
+ * When we will be completely rely on PSR2 S/W tracking in future,
+ * intel_psr_flush() will invalidate and flush the PSR for ORIGIN_FLIP
+ * event also therefore tgl_dc3co_flush() require to be changed
+ * accrodingly in future.
+ */
+static void
+tgl_dc3co_flush(struct drm_i915_private *dev_priv,
+ unsigned int frontbuffer_bits, enum fb_op_origin origin)
+{
+ u32 delay;
+
+ mutex_lock(&dev_priv->psr.lock);
+
+ if (!dev_priv->psr.dc3co_enabled)
+ goto unlock;
+
+ if (!dev_priv->psr.psr2_enabled || !dev_priv->psr.active)
+ goto unlock;
+
+ /*
+ * At every frontbuffer flush flip event modified delay of delayed work,
+ * when delayed work schedules that means display has been idle.
+ */
+ if (!(frontbuffer_bits &
+ INTEL_FRONTBUFFER_ALL_MASK(dev_priv->psr.pipe)))
+ goto unlock;
+
+ tgl_psr2_enable_dc3co(dev_priv);
+ /* DC5/DC6 required idle frames = 6 */
+ delay = 6 * dev_priv->psr.dc3co_exit_delay;
+ mod_delayed_work(system_wq, &dev_priv->psr.idle_work,
+ usecs_to_jiffies(delay));
+
+unlock:
+ mutex_unlock(&dev_priv->psr.lock);
+}
+
/**
* intel_psr_flush - Flush PSR
* @dev_priv: i915 device
if (!CAN_PSR(dev_priv))
return;
- if (origin == ORIGIN_FLIP)
+ if (origin == ORIGIN_FLIP) {
+ tgl_dc3co_flush(dev_priv, frontbuffer_bits, origin);
return;
+ }
mutex_lock(&dev_priv->psr.lock);
if (!dev_priv->psr.enabled) {
dev_priv->psr.link_standby = dev_priv->vbt.psr.full_link;
INIT_WORK(&dev_priv->psr.work, intel_psr_work);
+ INIT_DELAYED_WORK(&dev_priv->psr.idle_work, tgl_dc5_idle_thread);
mutex_init(&dev_priv->psr.lock);
}
projects / kernel.git / commitdiff