HDCP Helper Functions Reference
===============================
-.. kernel-doc:: drivers/gpu/drm/drm_hdcp.c
+.. kernel-doc:: drivers/gpu/drm/display/drm_hdcp_helper.c
:export:
Display Port Helper Functions Reference
#
drm_kms_helper-y := drm_bridge_connector.o drm_crtc_helper.o \
- drm_encoder_slave.o drm_flip_work.o drm_hdcp.o \
+ drm_encoder_slave.o drm_flip_work.o \
drm_probe_helper.o \
drm_plane_helper.o drm_atomic_helper.o \
drm_kms_helper_common.o \
config DRM_AMD_DC_HDCP
bool "Enable HDCP support in DC"
depends on DRM_AMD_DC
+ select DRM_DISPLAY_HDCP_HELPER
help
Choose this option if you want to support HDCP authentication.
#include "amdgpu_dm.h"
#ifdef CONFIG_DRM_AMD_DC_HDCP
#include "amdgpu_dm_hdcp.h"
-#include <drm/drm_hdcp.h>
+#include <drm/display/drm_hdcp_helper.h>
#endif
#include "amdgpu_pm.h"
#include "amdgpu_atombios.h"
#include "amdgpu.h"
#include "amdgpu_dm.h"
#include "dm_helpers.h"
-#include <drm/drm_hdcp.h>
+#include <drm/display/drm_hdcp_helper.h>
#include "hdcp_psp.h"
/*
#include "hdcp_log.h"
#include <drm/display/drm_dp_helper.h>
-#include <drm/drm_hdcp.h>
+#include <drm/display/drm_hdcp_helper.h>
enum mod_hdcp_trans_input_result {
UNKNOWN = 0,
tristate "ITE IT6505 DisplayPort bridge"
depends on OF
select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HDCP_HELPER
select DRM_DISPLAY_HELPER
select DRM_DP_AUX_BUS
select DRM_KMS_HELPER
depends on DRM
depends on OF
select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HDCP_HELPER
select DRM_DISPLAY_HELPER
select DRM_DP_AUX_BUS
select DRM_MIPI_DSI
#include <drm/display/drm_dp_aux_bus.h>
#include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_hdcp_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
-#include <drm/drm_hdcp.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
config DRM_CDNS_MHDP8546
tristate "Cadence DPI/DP bridge"
select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HDCP_HELPER
select DRM_DISPLAY_HELPER
select DRM_KMS_HELPER
select DRM_PANEL_BRIDGE
#include <linux/wait.h>
#include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_hdcp_helper.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_connector.h>
#include <drm/drm_crtc_helper.h>
-#include <drm/drm_hdcp.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <asm/unaligned.h>
-#include <drm/drm_hdcp.h>
+#include <drm/display/drm_hdcp_helper.h>
#include "cdns-mhdp8546-hdcp.h"
#include <crypto/hash.h>
#include <drm/display/drm_dp_helper.h>
+#include <drm/display/drm_hdcp_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
-#include <drm/drm_hdcp.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
help
DRM display helpers for DisplayPort.
+config DRM_DISPLAY_HDCP_HELPER
+ bool
+ depends on DRM_DISPLAY_HELPER
+ help
+ DRM display helpers for HDCP.
+
config DRM_DP_AUX_CHARDEV
bool "DRM DP AUX Interface"
depends on DRM
drm_dp_helper.o \
drm_dp_mst_topology.o \
drm_dsc_helper.o
+drm_display_helper-$(CONFIG_DRM_DISPLAY_HDCP_HELPER) += drm_hdcp_helper.o
drm_display_helper-$(CONFIG_DRM_DP_AUX_CHARDEV) += drm_dp_aux_dev.o
drm_display_helper-$(CONFIG_DRM_DP_CEC) += drm_dp_cec.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Intel Corporation.
+ *
+ * Authors:
+ * Ramalingam C <ramalingam.c@intel.com>
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gfp.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/firmware.h>
+
+#include <drm/display/drm_hdcp_helper.h>
+#include <drm/drm_sysfs.h>
+#include <drm/drm_print.h>
+#include <drm/drm_device.h>
+#include <drm/drm_property.h>
+#include <drm/drm_mode_object.h>
+#include <drm/drm_connector.h>
+
+static inline void drm_hdcp_print_ksv(const u8 *ksv)
+{
+ DRM_DEBUG("\t%#02x, %#02x, %#02x, %#02x, %#02x\n",
+ ksv[0], ksv[1], ksv[2], ksv[3], ksv[4]);
+}
+
+static u32 drm_hdcp_get_revoked_ksv_count(const u8 *buf, u32 vrls_length)
+{
+ u32 parsed_bytes = 0, ksv_count = 0, vrl_ksv_cnt, vrl_sz;
+
+ while (parsed_bytes < vrls_length) {
+ vrl_ksv_cnt = *buf;
+ ksv_count += vrl_ksv_cnt;
+
+ vrl_sz = (vrl_ksv_cnt * DRM_HDCP_KSV_LEN) + 1;
+ buf += vrl_sz;
+ parsed_bytes += vrl_sz;
+ }
+
+ /*
+ * When vrls are not valid, ksvs are not considered.
+ * Hence SRM will be discarded.
+ */
+ if (parsed_bytes != vrls_length)
+ ksv_count = 0;
+
+ return ksv_count;
+}
+
+static u32 drm_hdcp_get_revoked_ksvs(const u8 *buf, u8 **revoked_ksv_list,
+ u32 vrls_length)
+{
+ u32 vrl_ksv_cnt, vrl_ksv_sz, vrl_idx = 0;
+ u32 parsed_bytes = 0, ksv_count = 0;
+
+ do {
+ vrl_ksv_cnt = *buf;
+ vrl_ksv_sz = vrl_ksv_cnt * DRM_HDCP_KSV_LEN;
+
+ buf++;
+
+ DRM_DEBUG("vrl: %d, Revoked KSVs: %d\n", vrl_idx++,
+ vrl_ksv_cnt);
+ memcpy((*revoked_ksv_list) + (ksv_count * DRM_HDCP_KSV_LEN),
+ buf, vrl_ksv_sz);
+
+ ksv_count += vrl_ksv_cnt;
+ buf += vrl_ksv_sz;
+
+ parsed_bytes += (vrl_ksv_sz + 1);
+ } while (parsed_bytes < vrls_length);
+
+ return ksv_count;
+}
+
+static inline u32 get_vrl_length(const u8 *buf)
+{
+ return drm_hdcp_be24_to_cpu(buf);
+}
+
+static int drm_hdcp_parse_hdcp1_srm(const u8 *buf, size_t count,
+ u8 **revoked_ksv_list, u32 *revoked_ksv_cnt)
+{
+ struct hdcp_srm_header *header;
+ u32 vrl_length, ksv_count;
+
+ if (count < (sizeof(struct hdcp_srm_header) +
+ DRM_HDCP_1_4_VRL_LENGTH_SIZE + DRM_HDCP_1_4_DCP_SIG_SIZE)) {
+ DRM_ERROR("Invalid blob length\n");
+ return -EINVAL;
+ }
+
+ header = (struct hdcp_srm_header *)buf;
+ DRM_DEBUG("SRM ID: 0x%x, SRM Ver: 0x%x, SRM Gen No: 0x%x\n",
+ header->srm_id,
+ be16_to_cpu(header->srm_version), header->srm_gen_no);
+
+ WARN_ON(header->reserved);
+
+ buf = buf + sizeof(*header);
+ vrl_length = get_vrl_length(buf);
+ if (count < (sizeof(struct hdcp_srm_header) + vrl_length) ||
+ vrl_length < (DRM_HDCP_1_4_VRL_LENGTH_SIZE +
+ DRM_HDCP_1_4_DCP_SIG_SIZE)) {
+ DRM_ERROR("Invalid blob length or vrl length\n");
+ return -EINVAL;
+ }
+
+ /* Length of the all vrls combined */
+ vrl_length -= (DRM_HDCP_1_4_VRL_LENGTH_SIZE +
+ DRM_HDCP_1_4_DCP_SIG_SIZE);
+
+ if (!vrl_length) {
+ DRM_ERROR("No vrl found\n");
+ return -EINVAL;
+ }
+
+ buf += DRM_HDCP_1_4_VRL_LENGTH_SIZE;
+ ksv_count = drm_hdcp_get_revoked_ksv_count(buf, vrl_length);
+ if (!ksv_count) {
+ DRM_DEBUG("Revoked KSV count is 0\n");
+ return 0;
+ }
+
+ *revoked_ksv_list = kcalloc(ksv_count, DRM_HDCP_KSV_LEN, GFP_KERNEL);
+ if (!*revoked_ksv_list) {
+ DRM_ERROR("Out of Memory\n");
+ return -ENOMEM;
+ }
+
+ if (drm_hdcp_get_revoked_ksvs(buf, revoked_ksv_list,
+ vrl_length) != ksv_count) {
+ *revoked_ksv_cnt = 0;
+ kfree(*revoked_ksv_list);
+ return -EINVAL;
+ }
+
+ *revoked_ksv_cnt = ksv_count;
+ return 0;
+}
+
+static int drm_hdcp_parse_hdcp2_srm(const u8 *buf, size_t count,
+ u8 **revoked_ksv_list, u32 *revoked_ksv_cnt)
+{
+ struct hdcp_srm_header *header;
+ u32 vrl_length, ksv_count, ksv_sz;
+
+ if (count < (sizeof(struct hdcp_srm_header) +
+ DRM_HDCP_2_VRL_LENGTH_SIZE + DRM_HDCP_2_DCP_SIG_SIZE)) {
+ DRM_ERROR("Invalid blob length\n");
+ return -EINVAL;
+ }
+
+ header = (struct hdcp_srm_header *)buf;
+ DRM_DEBUG("SRM ID: 0x%x, SRM Ver: 0x%x, SRM Gen No: 0x%x\n",
+ header->srm_id & DRM_HDCP_SRM_ID_MASK,
+ be16_to_cpu(header->srm_version), header->srm_gen_no);
+
+ if (header->reserved)
+ return -EINVAL;
+
+ buf = buf + sizeof(*header);
+ vrl_length = get_vrl_length(buf);
+
+ if (count < (sizeof(struct hdcp_srm_header) + vrl_length) ||
+ vrl_length < (DRM_HDCP_2_VRL_LENGTH_SIZE +
+ DRM_HDCP_2_DCP_SIG_SIZE)) {
+ DRM_ERROR("Invalid blob length or vrl length\n");
+ return -EINVAL;
+ }
+
+ /* Length of the all vrls combined */
+ vrl_length -= (DRM_HDCP_2_VRL_LENGTH_SIZE +
+ DRM_HDCP_2_DCP_SIG_SIZE);
+
+ if (!vrl_length) {
+ DRM_ERROR("No vrl found\n");
+ return -EINVAL;
+ }
+
+ buf += DRM_HDCP_2_VRL_LENGTH_SIZE;
+ ksv_count = (*buf << 2) | DRM_HDCP_2_KSV_COUNT_2_LSBITS(*(buf + 1));
+ if (!ksv_count) {
+ DRM_DEBUG("Revoked KSV count is 0\n");
+ return 0;
+ }
+
+ *revoked_ksv_list = kcalloc(ksv_count, DRM_HDCP_KSV_LEN, GFP_KERNEL);
+ if (!*revoked_ksv_list) {
+ DRM_ERROR("Out of Memory\n");
+ return -ENOMEM;
+ }
+
+ ksv_sz = ksv_count * DRM_HDCP_KSV_LEN;
+ buf += DRM_HDCP_2_NO_OF_DEV_PLUS_RESERVED_SZ;
+
+ DRM_DEBUG("Revoked KSVs: %d\n", ksv_count);
+ memcpy(*revoked_ksv_list, buf, ksv_sz);
+
+ *revoked_ksv_cnt = ksv_count;
+ return 0;
+}
+
+static inline bool is_srm_version_hdcp1(const u8 *buf)
+{
+ return *buf == (u8)(DRM_HDCP_1_4_SRM_ID << 4);
+}
+
+static inline bool is_srm_version_hdcp2(const u8 *buf)
+{
+ return *buf == (u8)(DRM_HDCP_2_SRM_ID << 4 | DRM_HDCP_2_INDICATOR);
+}
+
+static int drm_hdcp_srm_update(const u8 *buf, size_t count,
+ u8 **revoked_ksv_list, u32 *revoked_ksv_cnt)
+{
+ if (count < sizeof(struct hdcp_srm_header))
+ return -EINVAL;
+
+ if (is_srm_version_hdcp1(buf))
+ return drm_hdcp_parse_hdcp1_srm(buf, count, revoked_ksv_list,
+ revoked_ksv_cnt);
+ else if (is_srm_version_hdcp2(buf))
+ return drm_hdcp_parse_hdcp2_srm(buf, count, revoked_ksv_list,
+ revoked_ksv_cnt);
+ else
+ return -EINVAL;
+}
+
+static int drm_hdcp_request_srm(struct drm_device *drm_dev,
+ u8 **revoked_ksv_list, u32 *revoked_ksv_cnt)
+{
+ char fw_name[36] = "display_hdcp_srm.bin";
+ const struct firmware *fw;
+ int ret;
+
+ ret = request_firmware_direct(&fw, (const char *)fw_name,
+ drm_dev->dev);
+ if (ret < 0) {
+ *revoked_ksv_cnt = 0;
+ *revoked_ksv_list = NULL;
+ ret = 0;
+ goto exit;
+ }
+
+ if (fw->size && fw->data)
+ ret = drm_hdcp_srm_update(fw->data, fw->size, revoked_ksv_list,
+ revoked_ksv_cnt);
+
+exit:
+ release_firmware(fw);
+ return ret;
+}
+
+/**
+ * drm_hdcp_check_ksvs_revoked - Check the revoked status of the IDs
+ *
+ * @drm_dev: drm_device for which HDCP revocation check is requested
+ * @ksvs: List of KSVs (HDCP receiver IDs)
+ * @ksv_count: KSV count passed in through @ksvs
+ *
+ * This function reads the HDCP System renewability Message(SRM Table)
+ * from userspace as a firmware and parses it for the revoked HDCP
+ * KSVs(Receiver IDs) detected by DCP LLC. Once the revoked KSVs are known,
+ * revoked state of the KSVs in the list passed in by display drivers are
+ * decided and response is sent.
+ *
+ * SRM should be presented in the name of "display_hdcp_srm.bin".
+ *
+ * Format of the SRM table, that userspace needs to write into the binary file,
+ * is defined at:
+ * 1. Renewability chapter on 55th page of HDCP 1.4 specification
+ * https://www.digital-cp.com/sites/default/files/specifications/HDCP%20Specification%20Rev1_4_Secure.pdf
+ * 2. Renewability chapter on 63rd page of HDCP 2.2 specification
+ * https://www.digital-cp.com/sites/default/files/specifications/HDCP%20on%20HDMI%20Specification%20Rev2_2_Final1.pdf
+ *
+ * Returns:
+ * Count of the revoked KSVs or -ve error number in case of the failure.
+ */
+int drm_hdcp_check_ksvs_revoked(struct drm_device *drm_dev, u8 *ksvs,
+ u32 ksv_count)
+{
+ u32 revoked_ksv_cnt = 0, i, j;
+ u8 *revoked_ksv_list = NULL;
+ int ret = 0;
+
+ ret = drm_hdcp_request_srm(drm_dev, &revoked_ksv_list,
+ &revoked_ksv_cnt);
+ if (ret)
+ return ret;
+
+ /* revoked_ksv_cnt will be zero when above function failed */
+ for (i = 0; i < revoked_ksv_cnt; i++)
+ for (j = 0; j < ksv_count; j++)
+ if (!memcmp(&ksvs[j * DRM_HDCP_KSV_LEN],
+ &revoked_ksv_list[i * DRM_HDCP_KSV_LEN],
+ DRM_HDCP_KSV_LEN)) {
+ DRM_DEBUG("Revoked KSV is ");
+ drm_hdcp_print_ksv(&ksvs[j * DRM_HDCP_KSV_LEN]);
+ ret++;
+ }
+
+ kfree(revoked_ksv_list);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(drm_hdcp_check_ksvs_revoked);
+
+static struct drm_prop_enum_list drm_cp_enum_list[] = {
+ { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" },
+ { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" },
+ { DRM_MODE_CONTENT_PROTECTION_ENABLED, "Enabled" },
+};
+DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list)
+
+static struct drm_prop_enum_list drm_hdcp_content_type_enum_list[] = {
+ { DRM_MODE_HDCP_CONTENT_TYPE0, "HDCP Type0" },
+ { DRM_MODE_HDCP_CONTENT_TYPE1, "HDCP Type1" },
+};
+DRM_ENUM_NAME_FN(drm_get_hdcp_content_type_name,
+ drm_hdcp_content_type_enum_list)
+
+/**
+ * drm_connector_attach_content_protection_property - attach content protection
+ * property
+ *
+ * @connector: connector to attach CP property on.
+ * @hdcp_content_type: is HDCP Content Type property needed for connector
+ *
+ * This is used to add support for content protection on select connectors.
+ * Content Protection is intentionally vague to allow for different underlying
+ * technologies, however it is most implemented by HDCP.
+ *
+ * When hdcp_content_type is true enum property called HDCP Content Type is
+ * created (if it is not already) and attached to the connector.
+ *
+ * This property is used for sending the protected content's stream type
+ * from userspace to kernel on selected connectors. Protected content provider
+ * will decide their type of their content and declare the same to kernel.
+ *
+ * Content type will be used during the HDCP 2.2 authentication.
+ * Content type will be set to &drm_connector_state.hdcp_content_type.
+ *
+ * The content protection will be set to &drm_connector_state.content_protection
+ *
+ * When kernel triggered content protection state change like DESIRED->ENABLED
+ * and ENABLED->DESIRED, will use drm_hdcp_update_content_protection() to update
+ * the content protection state of a connector.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_connector_attach_content_protection_property(
+ struct drm_connector *connector, bool hdcp_content_type)
+{
+ struct drm_device *dev = connector->dev;
+ struct drm_property *prop =
+ dev->mode_config.content_protection_property;
+
+ if (!prop)
+ prop = drm_property_create_enum(dev, 0, "Content Protection",
+ drm_cp_enum_list,
+ ARRAY_SIZE(drm_cp_enum_list));
+ if (!prop)
+ return -ENOMEM;
+
+ drm_object_attach_property(&connector->base, prop,
+ DRM_MODE_CONTENT_PROTECTION_UNDESIRED);
+ dev->mode_config.content_protection_property = prop;
+
+ if (!hdcp_content_type)
+ return 0;
+
+ prop = dev->mode_config.hdcp_content_type_property;
+ if (!prop)
+ prop = drm_property_create_enum(dev, 0, "HDCP Content Type",
+ drm_hdcp_content_type_enum_list,
+ ARRAY_SIZE(
+ drm_hdcp_content_type_enum_list));
+ if (!prop)
+ return -ENOMEM;
+
+ drm_object_attach_property(&connector->base, prop,
+ DRM_MODE_HDCP_CONTENT_TYPE0);
+ dev->mode_config.hdcp_content_type_property = prop;
+
+ return 0;
+}
+EXPORT_SYMBOL(drm_connector_attach_content_protection_property);
+
+/**
+ * drm_hdcp_update_content_protection - Updates the content protection state
+ * of a connector
+ *
+ * @connector: drm_connector on which content protection state needs an update
+ * @val: New state of the content protection property
+ *
+ * This function can be used by display drivers, to update the kernel triggered
+ * content protection state changes of a drm_connector such as DESIRED->ENABLED
+ * and ENABLED->DESIRED. No uevent for DESIRED->UNDESIRED or ENABLED->UNDESIRED,
+ * as userspace is triggering such state change and kernel performs it without
+ * fail.This function update the new state of the property into the connector's
+ * state and generate an uevent to notify the userspace.
+ */
+void drm_hdcp_update_content_protection(struct drm_connector *connector,
+ u64 val)
+{
+ struct drm_device *dev = connector->dev;
+ struct drm_connector_state *state = connector->state;
+
+ WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
+ if (state->content_protection == val)
+ return;
+
+ state->content_protection = val;
+ drm_sysfs_connector_status_event(connector,
+ dev->mode_config.content_protection_property);
+}
+EXPORT_SYMBOL(drm_hdcp_update_content_protection);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2019 Intel Corporation.
- *
- * Authors:
- * Ramalingam C <ramalingam.c@intel.com>
- */
-
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/gfp.h>
-#include <linux/export.h>
-#include <linux/slab.h>
-#include <linux/firmware.h>
-
-#include <drm/drm_hdcp.h>
-#include <drm/drm_sysfs.h>
-#include <drm/drm_print.h>
-#include <drm/drm_device.h>
-#include <drm/drm_property.h>
-#include <drm/drm_mode_object.h>
-#include <drm/drm_connector.h>
-
-#include "drm_internal.h"
-
-static inline void drm_hdcp_print_ksv(const u8 *ksv)
-{
- DRM_DEBUG("\t%#02x, %#02x, %#02x, %#02x, %#02x\n",
- ksv[0], ksv[1], ksv[2], ksv[3], ksv[4]);
-}
-
-static u32 drm_hdcp_get_revoked_ksv_count(const u8 *buf, u32 vrls_length)
-{
- u32 parsed_bytes = 0, ksv_count = 0, vrl_ksv_cnt, vrl_sz;
-
- while (parsed_bytes < vrls_length) {
- vrl_ksv_cnt = *buf;
- ksv_count += vrl_ksv_cnt;
-
- vrl_sz = (vrl_ksv_cnt * DRM_HDCP_KSV_LEN) + 1;
- buf += vrl_sz;
- parsed_bytes += vrl_sz;
- }
-
- /*
- * When vrls are not valid, ksvs are not considered.
- * Hence SRM will be discarded.
- */
- if (parsed_bytes != vrls_length)
- ksv_count = 0;
-
- return ksv_count;
-}
-
-static u32 drm_hdcp_get_revoked_ksvs(const u8 *buf, u8 **revoked_ksv_list,
- u32 vrls_length)
-{
- u32 vrl_ksv_cnt, vrl_ksv_sz, vrl_idx = 0;
- u32 parsed_bytes = 0, ksv_count = 0;
-
- do {
- vrl_ksv_cnt = *buf;
- vrl_ksv_sz = vrl_ksv_cnt * DRM_HDCP_KSV_LEN;
-
- buf++;
-
- DRM_DEBUG("vrl: %d, Revoked KSVs: %d\n", vrl_idx++,
- vrl_ksv_cnt);
- memcpy((*revoked_ksv_list) + (ksv_count * DRM_HDCP_KSV_LEN),
- buf, vrl_ksv_sz);
-
- ksv_count += vrl_ksv_cnt;
- buf += vrl_ksv_sz;
-
- parsed_bytes += (vrl_ksv_sz + 1);
- } while (parsed_bytes < vrls_length);
-
- return ksv_count;
-}
-
-static inline u32 get_vrl_length(const u8 *buf)
-{
- return drm_hdcp_be24_to_cpu(buf);
-}
-
-static int drm_hdcp_parse_hdcp1_srm(const u8 *buf, size_t count,
- u8 **revoked_ksv_list, u32 *revoked_ksv_cnt)
-{
- struct hdcp_srm_header *header;
- u32 vrl_length, ksv_count;
-
- if (count < (sizeof(struct hdcp_srm_header) +
- DRM_HDCP_1_4_VRL_LENGTH_SIZE + DRM_HDCP_1_4_DCP_SIG_SIZE)) {
- DRM_ERROR("Invalid blob length\n");
- return -EINVAL;
- }
-
- header = (struct hdcp_srm_header *)buf;
- DRM_DEBUG("SRM ID: 0x%x, SRM Ver: 0x%x, SRM Gen No: 0x%x\n",
- header->srm_id,
- be16_to_cpu(header->srm_version), header->srm_gen_no);
-
- WARN_ON(header->reserved);
-
- buf = buf + sizeof(*header);
- vrl_length = get_vrl_length(buf);
- if (count < (sizeof(struct hdcp_srm_header) + vrl_length) ||
- vrl_length < (DRM_HDCP_1_4_VRL_LENGTH_SIZE +
- DRM_HDCP_1_4_DCP_SIG_SIZE)) {
- DRM_ERROR("Invalid blob length or vrl length\n");
- return -EINVAL;
- }
-
- /* Length of the all vrls combined */
- vrl_length -= (DRM_HDCP_1_4_VRL_LENGTH_SIZE +
- DRM_HDCP_1_4_DCP_SIG_SIZE);
-
- if (!vrl_length) {
- DRM_ERROR("No vrl found\n");
- return -EINVAL;
- }
-
- buf += DRM_HDCP_1_4_VRL_LENGTH_SIZE;
- ksv_count = drm_hdcp_get_revoked_ksv_count(buf, vrl_length);
- if (!ksv_count) {
- DRM_DEBUG("Revoked KSV count is 0\n");
- return 0;
- }
-
- *revoked_ksv_list = kcalloc(ksv_count, DRM_HDCP_KSV_LEN, GFP_KERNEL);
- if (!*revoked_ksv_list) {
- DRM_ERROR("Out of Memory\n");
- return -ENOMEM;
- }
-
- if (drm_hdcp_get_revoked_ksvs(buf, revoked_ksv_list,
- vrl_length) != ksv_count) {
- *revoked_ksv_cnt = 0;
- kfree(*revoked_ksv_list);
- return -EINVAL;
- }
-
- *revoked_ksv_cnt = ksv_count;
- return 0;
-}
-
-static int drm_hdcp_parse_hdcp2_srm(const u8 *buf, size_t count,
- u8 **revoked_ksv_list, u32 *revoked_ksv_cnt)
-{
- struct hdcp_srm_header *header;
- u32 vrl_length, ksv_count, ksv_sz;
-
- if (count < (sizeof(struct hdcp_srm_header) +
- DRM_HDCP_2_VRL_LENGTH_SIZE + DRM_HDCP_2_DCP_SIG_SIZE)) {
- DRM_ERROR("Invalid blob length\n");
- return -EINVAL;
- }
-
- header = (struct hdcp_srm_header *)buf;
- DRM_DEBUG("SRM ID: 0x%x, SRM Ver: 0x%x, SRM Gen No: 0x%x\n",
- header->srm_id & DRM_HDCP_SRM_ID_MASK,
- be16_to_cpu(header->srm_version), header->srm_gen_no);
-
- if (header->reserved)
- return -EINVAL;
-
- buf = buf + sizeof(*header);
- vrl_length = get_vrl_length(buf);
-
- if (count < (sizeof(struct hdcp_srm_header) + vrl_length) ||
- vrl_length < (DRM_HDCP_2_VRL_LENGTH_SIZE +
- DRM_HDCP_2_DCP_SIG_SIZE)) {
- DRM_ERROR("Invalid blob length or vrl length\n");
- return -EINVAL;
- }
-
- /* Length of the all vrls combined */
- vrl_length -= (DRM_HDCP_2_VRL_LENGTH_SIZE +
- DRM_HDCP_2_DCP_SIG_SIZE);
-
- if (!vrl_length) {
- DRM_ERROR("No vrl found\n");
- return -EINVAL;
- }
-
- buf += DRM_HDCP_2_VRL_LENGTH_SIZE;
- ksv_count = (*buf << 2) | DRM_HDCP_2_KSV_COUNT_2_LSBITS(*(buf + 1));
- if (!ksv_count) {
- DRM_DEBUG("Revoked KSV count is 0\n");
- return 0;
- }
-
- *revoked_ksv_list = kcalloc(ksv_count, DRM_HDCP_KSV_LEN, GFP_KERNEL);
- if (!*revoked_ksv_list) {
- DRM_ERROR("Out of Memory\n");
- return -ENOMEM;
- }
-
- ksv_sz = ksv_count * DRM_HDCP_KSV_LEN;
- buf += DRM_HDCP_2_NO_OF_DEV_PLUS_RESERVED_SZ;
-
- DRM_DEBUG("Revoked KSVs: %d\n", ksv_count);
- memcpy(*revoked_ksv_list, buf, ksv_sz);
-
- *revoked_ksv_cnt = ksv_count;
- return 0;
-}
-
-static inline bool is_srm_version_hdcp1(const u8 *buf)
-{
- return *buf == (u8)(DRM_HDCP_1_4_SRM_ID << 4);
-}
-
-static inline bool is_srm_version_hdcp2(const u8 *buf)
-{
- return *buf == (u8)(DRM_HDCP_2_SRM_ID << 4 | DRM_HDCP_2_INDICATOR);
-}
-
-static int drm_hdcp_srm_update(const u8 *buf, size_t count,
- u8 **revoked_ksv_list, u32 *revoked_ksv_cnt)
-{
- if (count < sizeof(struct hdcp_srm_header))
- return -EINVAL;
-
- if (is_srm_version_hdcp1(buf))
- return drm_hdcp_parse_hdcp1_srm(buf, count, revoked_ksv_list,
- revoked_ksv_cnt);
- else if (is_srm_version_hdcp2(buf))
- return drm_hdcp_parse_hdcp2_srm(buf, count, revoked_ksv_list,
- revoked_ksv_cnt);
- else
- return -EINVAL;
-}
-
-static int drm_hdcp_request_srm(struct drm_device *drm_dev,
- u8 **revoked_ksv_list, u32 *revoked_ksv_cnt)
-{
- char fw_name[36] = "display_hdcp_srm.bin";
- const struct firmware *fw;
- int ret;
-
- ret = request_firmware_direct(&fw, (const char *)fw_name,
- drm_dev->dev);
- if (ret < 0) {
- *revoked_ksv_cnt = 0;
- *revoked_ksv_list = NULL;
- ret = 0;
- goto exit;
- }
-
- if (fw->size && fw->data)
- ret = drm_hdcp_srm_update(fw->data, fw->size, revoked_ksv_list,
- revoked_ksv_cnt);
-
-exit:
- release_firmware(fw);
- return ret;
-}
-
-/**
- * drm_hdcp_check_ksvs_revoked - Check the revoked status of the IDs
- *
- * @drm_dev: drm_device for which HDCP revocation check is requested
- * @ksvs: List of KSVs (HDCP receiver IDs)
- * @ksv_count: KSV count passed in through @ksvs
- *
- * This function reads the HDCP System renewability Message(SRM Table)
- * from userspace as a firmware and parses it for the revoked HDCP
- * KSVs(Receiver IDs) detected by DCP LLC. Once the revoked KSVs are known,
- * revoked state of the KSVs in the list passed in by display drivers are
- * decided and response is sent.
- *
- * SRM should be presented in the name of "display_hdcp_srm.bin".
- *
- * Format of the SRM table, that userspace needs to write into the binary file,
- * is defined at:
- * 1. Renewability chapter on 55th page of HDCP 1.4 specification
- * https://www.digital-cp.com/sites/default/files/specifications/HDCP%20Specification%20Rev1_4_Secure.pdf
- * 2. Renewability chapter on 63rd page of HDCP 2.2 specification
- * https://www.digital-cp.com/sites/default/files/specifications/HDCP%20on%20HDMI%20Specification%20Rev2_2_Final1.pdf
- *
- * Returns:
- * Count of the revoked KSVs or -ve error number in case of the failure.
- */
-int drm_hdcp_check_ksvs_revoked(struct drm_device *drm_dev, u8 *ksvs,
- u32 ksv_count)
-{
- u32 revoked_ksv_cnt = 0, i, j;
- u8 *revoked_ksv_list = NULL;
- int ret = 0;
-
- ret = drm_hdcp_request_srm(drm_dev, &revoked_ksv_list,
- &revoked_ksv_cnt);
- if (ret)
- return ret;
-
- /* revoked_ksv_cnt will be zero when above function failed */
- for (i = 0; i < revoked_ksv_cnt; i++)
- for (j = 0; j < ksv_count; j++)
- if (!memcmp(&ksvs[j * DRM_HDCP_KSV_LEN],
- &revoked_ksv_list[i * DRM_HDCP_KSV_LEN],
- DRM_HDCP_KSV_LEN)) {
- DRM_DEBUG("Revoked KSV is ");
- drm_hdcp_print_ksv(&ksvs[j * DRM_HDCP_KSV_LEN]);
- ret++;
- }
-
- kfree(revoked_ksv_list);
- return ret;
-}
-EXPORT_SYMBOL_GPL(drm_hdcp_check_ksvs_revoked);
-
-static struct drm_prop_enum_list drm_cp_enum_list[] = {
- { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" },
- { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" },
- { DRM_MODE_CONTENT_PROTECTION_ENABLED, "Enabled" },
-};
-DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list)
-
-static struct drm_prop_enum_list drm_hdcp_content_type_enum_list[] = {
- { DRM_MODE_HDCP_CONTENT_TYPE0, "HDCP Type0" },
- { DRM_MODE_HDCP_CONTENT_TYPE1, "HDCP Type1" },
-};
-DRM_ENUM_NAME_FN(drm_get_hdcp_content_type_name,
- drm_hdcp_content_type_enum_list)
-
-/**
- * drm_connector_attach_content_protection_property - attach content protection
- * property
- *
- * @connector: connector to attach CP property on.
- * @hdcp_content_type: is HDCP Content Type property needed for connector
- *
- * This is used to add support for content protection on select connectors.
- * Content Protection is intentionally vague to allow for different underlying
- * technologies, however it is most implemented by HDCP.
- *
- * When hdcp_content_type is true enum property called HDCP Content Type is
- * created (if it is not already) and attached to the connector.
- *
- * This property is used for sending the protected content's stream type
- * from userspace to kernel on selected connectors. Protected content provider
- * will decide their type of their content and declare the same to kernel.
- *
- * Content type will be used during the HDCP 2.2 authentication.
- * Content type will be set to &drm_connector_state.hdcp_content_type.
- *
- * The content protection will be set to &drm_connector_state.content_protection
- *
- * When kernel triggered content protection state change like DESIRED->ENABLED
- * and ENABLED->DESIRED, will use drm_hdcp_update_content_protection() to update
- * the content protection state of a connector.
- *
- * Returns:
- * Zero on success, negative errno on failure.
- */
-int drm_connector_attach_content_protection_property(
- struct drm_connector *connector, bool hdcp_content_type)
-{
- struct drm_device *dev = connector->dev;
- struct drm_property *prop =
- dev->mode_config.content_protection_property;
-
- if (!prop)
- prop = drm_property_create_enum(dev, 0, "Content Protection",
- drm_cp_enum_list,
- ARRAY_SIZE(drm_cp_enum_list));
- if (!prop)
- return -ENOMEM;
-
- drm_object_attach_property(&connector->base, prop,
- DRM_MODE_CONTENT_PROTECTION_UNDESIRED);
- dev->mode_config.content_protection_property = prop;
-
- if (!hdcp_content_type)
- return 0;
-
- prop = dev->mode_config.hdcp_content_type_property;
- if (!prop)
- prop = drm_property_create_enum(dev, 0, "HDCP Content Type",
- drm_hdcp_content_type_enum_list,
- ARRAY_SIZE(
- drm_hdcp_content_type_enum_list));
- if (!prop)
- return -ENOMEM;
-
- drm_object_attach_property(&connector->base, prop,
- DRM_MODE_HDCP_CONTENT_TYPE0);
- dev->mode_config.hdcp_content_type_property = prop;
-
- return 0;
-}
-EXPORT_SYMBOL(drm_connector_attach_content_protection_property);
-
-/**
- * drm_hdcp_update_content_protection - Updates the content protection state
- * of a connector
- *
- * @connector: drm_connector on which content protection state needs an update
- * @val: New state of the content protection property
- *
- * This function can be used by display drivers, to update the kernel triggered
- * content protection state changes of a drm_connector such as DESIRED->ENABLED
- * and ENABLED->DESIRED. No uevent for DESIRED->UNDESIRED or ENABLED->UNDESIRED,
- * as userspace is triggering such state change and kernel performs it without
- * fail.This function update the new state of the property into the connector's
- * state and generate an uevent to notify the userspace.
- */
-void drm_hdcp_update_content_protection(struct drm_connector *connector,
- u64 val)
-{
- struct drm_device *dev = connector->dev;
- struct drm_connector_state *state = connector->state;
-
- WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
- if (state->content_protection == val)
- return;
-
- state->content_protection = val;
- drm_sysfs_connector_status_event(connector,
- dev->mode_config.content_protection_property);
-}
-EXPORT_SYMBOL(drm_hdcp_update_content_protection);
select SHMEM
select TMPFS
select DRM_DISPLAY_DP_HELPER
+ select DRM_DISPLAY_HDCP_HELPER
select DRM_DISPLAY_HELPER
select DRM_KMS_HELPER
select DRM_PANEL
#include <drm/display/drm_dp_helper.h>
#include <drm/display/drm_dp_mst_helper.h>
-#include <drm/drm_hdcp.h>
+#include <drm/display/drm_hdcp_helper.h>
#include <drm/drm_print.h>
#include "intel_ddi.h"
#include <linux/i2c-algo-bit.h>
#include <linux/i2c.h>
-#include <drm/drm_hdcp.h>
+#include <drm/display/drm_hdcp_helper.h>
#include "i915_drv.h"
#include "intel_de.h"
#include <linux/i2c.h>
#include <linux/random.h>
-#include <drm/drm_hdcp.h>
+#include <drm/display/drm_hdcp_helper.h>
#include <drm/i915_component.h>
#include "i915_drv.h"
#include <linux/slab.h>
#include <linux/string_helpers.h>
+#include <drm/display/drm_hdcp_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
-#include <drm/drm_hdcp.h>
#include <drm/drm_scdc_helper.h>
#include <drm/intel_lpe_audio.h>
#ifndef __MEI_HDCP_H__
#define __MEI_HDCP_H__
-#include <drm/drm_hdcp.h>
+#include <drm/display/drm_hdcp.h>
/* me_hdcp_status: Enumeration of all HDCP Status Codes */
enum me_hdcp_status {
--- /dev/null
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright (C) 2017 Google, Inc.
+ *
+ * Authors:
+ * Sean Paul <seanpaul@chromium.org>
+ */
+
+#ifndef _DRM_HDCP_H_
+#define _DRM_HDCP_H_
+
+#include <linux/types.h>
+
+/* Period of hdcp checks (to ensure we're still authenticated) */
+#define DRM_HDCP_CHECK_PERIOD_MS (128 * 16)
+#define DRM_HDCP2_CHECK_PERIOD_MS 500
+
+/* Shared lengths/masks between HDMI/DVI/DisplayPort */
+#define DRM_HDCP_AN_LEN 8
+#define DRM_HDCP_BSTATUS_LEN 2
+#define DRM_HDCP_KSV_LEN 5
+#define DRM_HDCP_RI_LEN 2
+#define DRM_HDCP_V_PRIME_PART_LEN 4
+#define DRM_HDCP_V_PRIME_NUM_PARTS 5
+#define DRM_HDCP_NUM_DOWNSTREAM(x) (x & 0x7f)
+#define DRM_HDCP_MAX_CASCADE_EXCEEDED(x) (x & BIT(3))
+#define DRM_HDCP_MAX_DEVICE_EXCEEDED(x) (x & BIT(7))
+
+/* Slave address for the HDCP registers in the receiver */
+#define DRM_HDCP_DDC_ADDR 0x3A
+
+/* Value to use at the end of the SHA-1 bytestream used for repeaters */
+#define DRM_HDCP_SHA1_TERMINATOR 0x80
+
+/* HDCP register offsets for HDMI/DVI devices */
+#define DRM_HDCP_DDC_BKSV 0x00
+#define DRM_HDCP_DDC_RI_PRIME 0x08
+#define DRM_HDCP_DDC_AKSV 0x10
+#define DRM_HDCP_DDC_AN 0x18
+#define DRM_HDCP_DDC_V_PRIME(h) (0x20 + h * 4)
+#define DRM_HDCP_DDC_BCAPS 0x40
+#define DRM_HDCP_DDC_BCAPS_REPEATER_PRESENT BIT(6)
+#define DRM_HDCP_DDC_BCAPS_KSV_FIFO_READY BIT(5)
+#define DRM_HDCP_DDC_BSTATUS 0x41
+#define DRM_HDCP_DDC_KSV_FIFO 0x43
+
+#define DRM_HDCP_1_4_SRM_ID 0x8
+#define DRM_HDCP_1_4_VRL_LENGTH_SIZE 3
+#define DRM_HDCP_1_4_DCP_SIG_SIZE 40
+
+/* Protocol message definition for HDCP2.2 specification */
+/*
+ * Protected content streams are classified into 2 types:
+ * - Type0: Can be transmitted with HDCP 1.4+
+ * - Type1: Can be transmitted with HDCP 2.2+
+ */
+#define HDCP_STREAM_TYPE0 0x00
+#define HDCP_STREAM_TYPE1 0x01
+
+/* HDCP2.2 Msg IDs */
+#define HDCP_2_2_NULL_MSG 1
+#define HDCP_2_2_AKE_INIT 2
+#define HDCP_2_2_AKE_SEND_CERT 3
+#define HDCP_2_2_AKE_NO_STORED_KM 4
+#define HDCP_2_2_AKE_STORED_KM 5
+#define HDCP_2_2_AKE_SEND_HPRIME 7
+#define HDCP_2_2_AKE_SEND_PAIRING_INFO 8
+#define HDCP_2_2_LC_INIT 9
+#define HDCP_2_2_LC_SEND_LPRIME 10
+#define HDCP_2_2_SKE_SEND_EKS 11
+#define HDCP_2_2_REP_SEND_RECVID_LIST 12
+#define HDCP_2_2_REP_SEND_ACK 15
+#define HDCP_2_2_REP_STREAM_MANAGE 16
+#define HDCP_2_2_REP_STREAM_READY 17
+
+#define HDCP_2_2_RTX_LEN 8
+#define HDCP_2_2_RRX_LEN 8
+
+#define HDCP_2_2_K_PUB_RX_MOD_N_LEN 128
+#define HDCP_2_2_K_PUB_RX_EXP_E_LEN 3
+#define HDCP_2_2_K_PUB_RX_LEN (HDCP_2_2_K_PUB_RX_MOD_N_LEN + \
+ HDCP_2_2_K_PUB_RX_EXP_E_LEN)
+
+#define HDCP_2_2_DCP_LLC_SIG_LEN 384
+
+#define HDCP_2_2_E_KPUB_KM_LEN 128
+#define HDCP_2_2_E_KH_KM_M_LEN (16 + 16)
+#define HDCP_2_2_H_PRIME_LEN 32
+#define HDCP_2_2_E_KH_KM_LEN 16
+#define HDCP_2_2_RN_LEN 8
+#define HDCP_2_2_L_PRIME_LEN 32
+#define HDCP_2_2_E_DKEY_KS_LEN 16
+#define HDCP_2_2_RIV_LEN 8
+#define HDCP_2_2_SEQ_NUM_LEN 3
+#define HDCP_2_2_V_PRIME_HALF_LEN (HDCP_2_2_L_PRIME_LEN / 2)
+#define HDCP_2_2_RECEIVER_ID_LEN DRM_HDCP_KSV_LEN
+#define HDCP_2_2_MAX_DEVICE_COUNT 31
+#define HDCP_2_2_RECEIVER_IDS_MAX_LEN (HDCP_2_2_RECEIVER_ID_LEN * \
+ HDCP_2_2_MAX_DEVICE_COUNT)
+#define HDCP_2_2_MPRIME_LEN 32
+
+/* Following Macros take a byte at a time for bit(s) masking */
+/*
+ * TODO: HDCP_2_2_MAX_CONTENT_STREAMS_CNT is based upon actual
+ * H/W MST streams capacity.
+ * This required to be moved out to platform specific header.
+ */
+#define HDCP_2_2_MAX_CONTENT_STREAMS_CNT 4
+#define HDCP_2_2_TXCAP_MASK_LEN 2
+#define HDCP_2_2_RXCAPS_LEN 3
+#define HDCP_2_2_RX_REPEATER(x) ((x) & BIT(0))
+#define HDCP_2_2_DP_HDCP_CAPABLE(x) ((x) & BIT(1))
+#define HDCP_2_2_RXINFO_LEN 2
+
+/* HDCP1.x compliant device in downstream */
+#define HDCP_2_2_HDCP1_DEVICE_CONNECTED(x) ((x) & BIT(0))
+
+/* HDCP2.0 Compliant repeater in downstream */
+#define HDCP_2_2_HDCP_2_0_REP_CONNECTED(x) ((x) & BIT(1))
+#define HDCP_2_2_MAX_CASCADE_EXCEEDED(x) ((x) & BIT(2))
+#define HDCP_2_2_MAX_DEVS_EXCEEDED(x) ((x) & BIT(3))
+#define HDCP_2_2_DEV_COUNT_LO(x) (((x) & (0xF << 4)) >> 4)
+#define HDCP_2_2_DEV_COUNT_HI(x) ((x) & BIT(0))
+#define HDCP_2_2_DEPTH(x) (((x) & (0x7 << 1)) >> 1)
+
+struct hdcp2_cert_rx {
+ u8 receiver_id[HDCP_2_2_RECEIVER_ID_LEN];
+ u8 kpub_rx[HDCP_2_2_K_PUB_RX_LEN];
+ u8 reserved[2];
+ u8 dcp_signature[HDCP_2_2_DCP_LLC_SIG_LEN];
+} __packed;
+
+struct hdcp2_streamid_type {
+ u8 stream_id;
+ u8 stream_type;
+} __packed;
+
+/*
+ * The TxCaps field specified in the HDCP HDMI, DP specs
+ * This field is big endian as specified in the errata.
+ */
+struct hdcp2_tx_caps {
+ /* Transmitter must set this to 0x2 */
+ u8 version;
+
+ /* Reserved for HDCP and DP Spec. Read as Zero */
+ u8 tx_cap_mask[HDCP_2_2_TXCAP_MASK_LEN];
+} __packed;
+
+/* Main structures for HDCP2.2 protocol communication */
+struct hdcp2_ake_init {
+ u8 msg_id;
+ u8 r_tx[HDCP_2_2_RTX_LEN];
+ struct hdcp2_tx_caps tx_caps;
+} __packed;
+
+struct hdcp2_ake_send_cert {
+ u8 msg_id;
+ struct hdcp2_cert_rx cert_rx;
+ u8 r_rx[HDCP_2_2_RRX_LEN];
+ u8 rx_caps[HDCP_2_2_RXCAPS_LEN];
+} __packed;
+
+struct hdcp2_ake_no_stored_km {
+ u8 msg_id;
+ u8 e_kpub_km[HDCP_2_2_E_KPUB_KM_LEN];
+} __packed;
+
+struct hdcp2_ake_stored_km {
+ u8 msg_id;
+ u8 e_kh_km_m[HDCP_2_2_E_KH_KM_M_LEN];
+} __packed;
+
+struct hdcp2_ake_send_hprime {
+ u8 msg_id;
+ u8 h_prime[HDCP_2_2_H_PRIME_LEN];
+} __packed;
+
+struct hdcp2_ake_send_pairing_info {
+ u8 msg_id;
+ u8 e_kh_km[HDCP_2_2_E_KH_KM_LEN];
+} __packed;
+
+struct hdcp2_lc_init {
+ u8 msg_id;
+ u8 r_n[HDCP_2_2_RN_LEN];
+} __packed;
+
+struct hdcp2_lc_send_lprime {
+ u8 msg_id;
+ u8 l_prime[HDCP_2_2_L_PRIME_LEN];
+} __packed;
+
+struct hdcp2_ske_send_eks {
+ u8 msg_id;
+ u8 e_dkey_ks[HDCP_2_2_E_DKEY_KS_LEN];
+ u8 riv[HDCP_2_2_RIV_LEN];
+} __packed;
+
+struct hdcp2_rep_send_receiverid_list {
+ u8 msg_id;
+ u8 rx_info[HDCP_2_2_RXINFO_LEN];
+ u8 seq_num_v[HDCP_2_2_SEQ_NUM_LEN];
+ u8 v_prime[HDCP_2_2_V_PRIME_HALF_LEN];
+ u8 receiver_ids[HDCP_2_2_RECEIVER_IDS_MAX_LEN];
+} __packed;
+
+struct hdcp2_rep_send_ack {
+ u8 msg_id;
+ u8 v[HDCP_2_2_V_PRIME_HALF_LEN];
+} __packed;
+
+struct hdcp2_rep_stream_manage {
+ u8 msg_id;
+ u8 seq_num_m[HDCP_2_2_SEQ_NUM_LEN];
+ __be16 k;
+ struct hdcp2_streamid_type streams[HDCP_2_2_MAX_CONTENT_STREAMS_CNT];
+} __packed;
+
+struct hdcp2_rep_stream_ready {
+ u8 msg_id;
+ u8 m_prime[HDCP_2_2_MPRIME_LEN];
+} __packed;
+
+/* HDCP2.2 TIMEOUTs in mSec */
+#define HDCP_2_2_CERT_TIMEOUT_MS 100
+#define HDCP_2_2_DP_CERT_READ_TIMEOUT_MS 110
+#define HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS 1000
+#define HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS 200
+#define HDCP_2_2_DP_HPRIME_READ_TIMEOUT_MS 7
+#define HDCP_2_2_PAIRING_TIMEOUT_MS 200
+#define HDCP_2_2_DP_PAIRING_READ_TIMEOUT_MS 5
+#define HDCP_2_2_HDMI_LPRIME_TIMEOUT_MS 20
+#define HDCP_2_2_DP_LPRIME_TIMEOUT_MS 16
+#define HDCP_2_2_RECVID_LIST_TIMEOUT_MS 3000
+#define HDCP_2_2_STREAM_READY_TIMEOUT_MS 100
+
+/* HDMI HDCP2.2 Register Offsets */
+#define HDCP_2_2_HDMI_REG_VER_OFFSET 0x50
+#define HDCP_2_2_HDMI_REG_WR_MSG_OFFSET 0x60
+#define HDCP_2_2_HDMI_REG_RXSTATUS_OFFSET 0x70
+#define HDCP_2_2_HDMI_REG_RD_MSG_OFFSET 0x80
+#define HDCP_2_2_HDMI_REG_DBG_OFFSET 0xC0
+
+#define HDCP_2_2_HDMI_SUPPORT_MASK BIT(2)
+#define HDCP_2_2_RX_CAPS_VERSION_VAL 0x02
+#define HDCP_2_2_SEQ_NUM_MAX 0xFFFFFF
+#define HDCP_2_2_DELAY_BEFORE_ENCRYPTION_EN 200
+
+/* Below macros take a byte at a time and mask the bit(s) */
+#define HDCP_2_2_HDMI_RXSTATUS_LEN 2
+#define HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(x) ((x) & 0x3)
+#define HDCP_2_2_HDMI_RXSTATUS_READY(x) ((x) & BIT(2))
+#define HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(x) ((x) & BIT(3))
+
+/*
+ * Helper functions to convert 24bit big endian hdcp sequence number to
+ * host format and back
+ */
+static inline
+u32 drm_hdcp_be24_to_cpu(const u8 seq_num[HDCP_2_2_SEQ_NUM_LEN])
+{
+ return (u32)(seq_num[2] | seq_num[1] << 8 | seq_num[0] << 16);
+}
+
+static inline
+void drm_hdcp_cpu_to_be24(u8 seq_num[HDCP_2_2_SEQ_NUM_LEN], u32 val)
+{
+ seq_num[0] = val >> 16;
+ seq_num[1] = val >> 8;
+ seq_num[2] = val;
+}
+
+#define DRM_HDCP_SRM_GEN1_MAX_BYTES (5 * 1024)
+#define DRM_HDCP_1_4_SRM_ID 0x8
+#define DRM_HDCP_SRM_ID_MASK (0xF << 4)
+#define DRM_HDCP_1_4_VRL_LENGTH_SIZE 3
+#define DRM_HDCP_1_4_DCP_SIG_SIZE 40
+#define DRM_HDCP_2_SRM_ID 0x9
+#define DRM_HDCP_2_INDICATOR 0x1
+#define DRM_HDCP_2_INDICATOR_MASK 0xF
+#define DRM_HDCP_2_VRL_LENGTH_SIZE 3
+#define DRM_HDCP_2_DCP_SIG_SIZE 384
+#define DRM_HDCP_2_NO_OF_DEV_PLUS_RESERVED_SZ 4
+#define DRM_HDCP_2_KSV_COUNT_2_LSBITS(byte) (((byte) & 0xC0) >> 6)
+
+struct hdcp_srm_header {
+ u8 srm_id;
+ u8 reserved;
+ __be16 srm_version;
+ u8 srm_gen_no;
+} __packed;
+
+/* Content Type classification for HDCP2.2 vs others */
+#define DRM_MODE_HDCP_CONTENT_TYPE0 0
+#define DRM_MODE_HDCP_CONTENT_TYPE1 1
+
+#endif
--- /dev/null
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright (C) 2017 Google, Inc.
+ *
+ * Authors:
+ * Sean Paul <seanpaul@chromium.org>
+ */
+
+#ifndef _DRM_HDCP_HELPER_H_INCLUDED_
+#define _DRM_HDCP_HELPER_H_INCLUDED_
+
+#include <drm/display/drm_hdcp.h>
+
+struct drm_device;
+struct drm_connector;
+
+int drm_hdcp_check_ksvs_revoked(struct drm_device *dev, u8 *ksvs, u32 ksv_count);
+int drm_connector_attach_content_protection_property(struct drm_connector *connector,
+ bool hdcp_content_type);
+void drm_hdcp_update_content_protection(struct drm_connector *connector, u64 val);
+
+#endif
+++ /dev/null
-/* SPDX-License-Identifier: MIT */
-/*
- * Copyright (C) 2017 Google, Inc.
- *
- * Authors:
- * Sean Paul <seanpaul@chromium.org>
- */
-
-#ifndef _DRM_HDCP_H_INCLUDED_
-#define _DRM_HDCP_H_INCLUDED_
-
-#include <linux/types.h>
-
-/* Period of hdcp checks (to ensure we're still authenticated) */
-#define DRM_HDCP_CHECK_PERIOD_MS (128 * 16)
-#define DRM_HDCP2_CHECK_PERIOD_MS 500
-
-/* Shared lengths/masks between HDMI/DVI/DisplayPort */
-#define DRM_HDCP_AN_LEN 8
-#define DRM_HDCP_BSTATUS_LEN 2
-#define DRM_HDCP_KSV_LEN 5
-#define DRM_HDCP_RI_LEN 2
-#define DRM_HDCP_V_PRIME_PART_LEN 4
-#define DRM_HDCP_V_PRIME_NUM_PARTS 5
-#define DRM_HDCP_NUM_DOWNSTREAM(x) (x & 0x7f)
-#define DRM_HDCP_MAX_CASCADE_EXCEEDED(x) (x & BIT(3))
-#define DRM_HDCP_MAX_DEVICE_EXCEEDED(x) (x & BIT(7))
-
-/* Slave address for the HDCP registers in the receiver */
-#define DRM_HDCP_DDC_ADDR 0x3A
-
-/* Value to use at the end of the SHA-1 bytestream used for repeaters */
-#define DRM_HDCP_SHA1_TERMINATOR 0x80
-
-/* HDCP register offsets for HDMI/DVI devices */
-#define DRM_HDCP_DDC_BKSV 0x00
-#define DRM_HDCP_DDC_RI_PRIME 0x08
-#define DRM_HDCP_DDC_AKSV 0x10
-#define DRM_HDCP_DDC_AN 0x18
-#define DRM_HDCP_DDC_V_PRIME(h) (0x20 + h * 4)
-#define DRM_HDCP_DDC_BCAPS 0x40
-#define DRM_HDCP_DDC_BCAPS_REPEATER_PRESENT BIT(6)
-#define DRM_HDCP_DDC_BCAPS_KSV_FIFO_READY BIT(5)
-#define DRM_HDCP_DDC_BSTATUS 0x41
-#define DRM_HDCP_DDC_KSV_FIFO 0x43
-
-#define DRM_HDCP_1_4_SRM_ID 0x8
-#define DRM_HDCP_1_4_VRL_LENGTH_SIZE 3
-#define DRM_HDCP_1_4_DCP_SIG_SIZE 40
-
-/* Protocol message definition for HDCP2.2 specification */
-/*
- * Protected content streams are classified into 2 types:
- * - Type0: Can be transmitted with HDCP 1.4+
- * - Type1: Can be transmitted with HDCP 2.2+
- */
-#define HDCP_STREAM_TYPE0 0x00
-#define HDCP_STREAM_TYPE1 0x01
-
-/* HDCP2.2 Msg IDs */
-#define HDCP_2_2_NULL_MSG 1
-#define HDCP_2_2_AKE_INIT 2
-#define HDCP_2_2_AKE_SEND_CERT 3
-#define HDCP_2_2_AKE_NO_STORED_KM 4
-#define HDCP_2_2_AKE_STORED_KM 5
-#define HDCP_2_2_AKE_SEND_HPRIME 7
-#define HDCP_2_2_AKE_SEND_PAIRING_INFO 8
-#define HDCP_2_2_LC_INIT 9
-#define HDCP_2_2_LC_SEND_LPRIME 10
-#define HDCP_2_2_SKE_SEND_EKS 11
-#define HDCP_2_2_REP_SEND_RECVID_LIST 12
-#define HDCP_2_2_REP_SEND_ACK 15
-#define HDCP_2_2_REP_STREAM_MANAGE 16
-#define HDCP_2_2_REP_STREAM_READY 17
-
-#define HDCP_2_2_RTX_LEN 8
-#define HDCP_2_2_RRX_LEN 8
-
-#define HDCP_2_2_K_PUB_RX_MOD_N_LEN 128
-#define HDCP_2_2_K_PUB_RX_EXP_E_LEN 3
-#define HDCP_2_2_K_PUB_RX_LEN (HDCP_2_2_K_PUB_RX_MOD_N_LEN + \
- HDCP_2_2_K_PUB_RX_EXP_E_LEN)
-
-#define HDCP_2_2_DCP_LLC_SIG_LEN 384
-
-#define HDCP_2_2_E_KPUB_KM_LEN 128
-#define HDCP_2_2_E_KH_KM_M_LEN (16 + 16)
-#define HDCP_2_2_H_PRIME_LEN 32
-#define HDCP_2_2_E_KH_KM_LEN 16
-#define HDCP_2_2_RN_LEN 8
-#define HDCP_2_2_L_PRIME_LEN 32
-#define HDCP_2_2_E_DKEY_KS_LEN 16
-#define HDCP_2_2_RIV_LEN 8
-#define HDCP_2_2_SEQ_NUM_LEN 3
-#define HDCP_2_2_V_PRIME_HALF_LEN (HDCP_2_2_L_PRIME_LEN / 2)
-#define HDCP_2_2_RECEIVER_ID_LEN DRM_HDCP_KSV_LEN
-#define HDCP_2_2_MAX_DEVICE_COUNT 31
-#define HDCP_2_2_RECEIVER_IDS_MAX_LEN (HDCP_2_2_RECEIVER_ID_LEN * \
- HDCP_2_2_MAX_DEVICE_COUNT)
-#define HDCP_2_2_MPRIME_LEN 32
-
-/* Following Macros take a byte at a time for bit(s) masking */
-/*
- * TODO: HDCP_2_2_MAX_CONTENT_STREAMS_CNT is based upon actual
- * H/W MST streams capacity.
- * This required to be moved out to platform specific header.
- */
-#define HDCP_2_2_MAX_CONTENT_STREAMS_CNT 4
-#define HDCP_2_2_TXCAP_MASK_LEN 2
-#define HDCP_2_2_RXCAPS_LEN 3
-#define HDCP_2_2_RX_REPEATER(x) ((x) & BIT(0))
-#define HDCP_2_2_DP_HDCP_CAPABLE(x) ((x) & BIT(1))
-#define HDCP_2_2_RXINFO_LEN 2
-
-/* HDCP1.x compliant device in downstream */
-#define HDCP_2_2_HDCP1_DEVICE_CONNECTED(x) ((x) & BIT(0))
-
-/* HDCP2.0 Compliant repeater in downstream */
-#define HDCP_2_2_HDCP_2_0_REP_CONNECTED(x) ((x) & BIT(1))
-#define HDCP_2_2_MAX_CASCADE_EXCEEDED(x) ((x) & BIT(2))
-#define HDCP_2_2_MAX_DEVS_EXCEEDED(x) ((x) & BIT(3))
-#define HDCP_2_2_DEV_COUNT_LO(x) (((x) & (0xF << 4)) >> 4)
-#define HDCP_2_2_DEV_COUNT_HI(x) ((x) & BIT(0))
-#define HDCP_2_2_DEPTH(x) (((x) & (0x7 << 1)) >> 1)
-
-struct hdcp2_cert_rx {
- u8 receiver_id[HDCP_2_2_RECEIVER_ID_LEN];
- u8 kpub_rx[HDCP_2_2_K_PUB_RX_LEN];
- u8 reserved[2];
- u8 dcp_signature[HDCP_2_2_DCP_LLC_SIG_LEN];
-} __packed;
-
-struct hdcp2_streamid_type {
- u8 stream_id;
- u8 stream_type;
-} __packed;
-
-/*
- * The TxCaps field specified in the HDCP HDMI, DP specs
- * This field is big endian as specified in the errata.
- */
-struct hdcp2_tx_caps {
- /* Transmitter must set this to 0x2 */
- u8 version;
-
- /* Reserved for HDCP and DP Spec. Read as Zero */
- u8 tx_cap_mask[HDCP_2_2_TXCAP_MASK_LEN];
-} __packed;
-
-/* Main structures for HDCP2.2 protocol communication */
-struct hdcp2_ake_init {
- u8 msg_id;
- u8 r_tx[HDCP_2_2_RTX_LEN];
- struct hdcp2_tx_caps tx_caps;
-} __packed;
-
-struct hdcp2_ake_send_cert {
- u8 msg_id;
- struct hdcp2_cert_rx cert_rx;
- u8 r_rx[HDCP_2_2_RRX_LEN];
- u8 rx_caps[HDCP_2_2_RXCAPS_LEN];
-} __packed;
-
-struct hdcp2_ake_no_stored_km {
- u8 msg_id;
- u8 e_kpub_km[HDCP_2_2_E_KPUB_KM_LEN];
-} __packed;
-
-struct hdcp2_ake_stored_km {
- u8 msg_id;
- u8 e_kh_km_m[HDCP_2_2_E_KH_KM_M_LEN];
-} __packed;
-
-struct hdcp2_ake_send_hprime {
- u8 msg_id;
- u8 h_prime[HDCP_2_2_H_PRIME_LEN];
-} __packed;
-
-struct hdcp2_ake_send_pairing_info {
- u8 msg_id;
- u8 e_kh_km[HDCP_2_2_E_KH_KM_LEN];
-} __packed;
-
-struct hdcp2_lc_init {
- u8 msg_id;
- u8 r_n[HDCP_2_2_RN_LEN];
-} __packed;
-
-struct hdcp2_lc_send_lprime {
- u8 msg_id;
- u8 l_prime[HDCP_2_2_L_PRIME_LEN];
-} __packed;
-
-struct hdcp2_ske_send_eks {
- u8 msg_id;
- u8 e_dkey_ks[HDCP_2_2_E_DKEY_KS_LEN];
- u8 riv[HDCP_2_2_RIV_LEN];
-} __packed;
-
-struct hdcp2_rep_send_receiverid_list {
- u8 msg_id;
- u8 rx_info[HDCP_2_2_RXINFO_LEN];
- u8 seq_num_v[HDCP_2_2_SEQ_NUM_LEN];
- u8 v_prime[HDCP_2_2_V_PRIME_HALF_LEN];
- u8 receiver_ids[HDCP_2_2_RECEIVER_IDS_MAX_LEN];
-} __packed;
-
-struct hdcp2_rep_send_ack {
- u8 msg_id;
- u8 v[HDCP_2_2_V_PRIME_HALF_LEN];
-} __packed;
-
-struct hdcp2_rep_stream_manage {
- u8 msg_id;
- u8 seq_num_m[HDCP_2_2_SEQ_NUM_LEN];
- __be16 k;
- struct hdcp2_streamid_type streams[HDCP_2_2_MAX_CONTENT_STREAMS_CNT];
-} __packed;
-
-struct hdcp2_rep_stream_ready {
- u8 msg_id;
- u8 m_prime[HDCP_2_2_MPRIME_LEN];
-} __packed;
-
-/* HDCP2.2 TIMEOUTs in mSec */
-#define HDCP_2_2_CERT_TIMEOUT_MS 100
-#define HDCP_2_2_DP_CERT_READ_TIMEOUT_MS 110
-#define HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS 1000
-#define HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS 200
-#define HDCP_2_2_DP_HPRIME_READ_TIMEOUT_MS 7
-#define HDCP_2_2_PAIRING_TIMEOUT_MS 200
-#define HDCP_2_2_DP_PAIRING_READ_TIMEOUT_MS 5
-#define HDCP_2_2_HDMI_LPRIME_TIMEOUT_MS 20
-#define HDCP_2_2_DP_LPRIME_TIMEOUT_MS 16
-#define HDCP_2_2_RECVID_LIST_TIMEOUT_MS 3000
-#define HDCP_2_2_STREAM_READY_TIMEOUT_MS 100
-
-/* HDMI HDCP2.2 Register Offsets */
-#define HDCP_2_2_HDMI_REG_VER_OFFSET 0x50
-#define HDCP_2_2_HDMI_REG_WR_MSG_OFFSET 0x60
-#define HDCP_2_2_HDMI_REG_RXSTATUS_OFFSET 0x70
-#define HDCP_2_2_HDMI_REG_RD_MSG_OFFSET 0x80
-#define HDCP_2_2_HDMI_REG_DBG_OFFSET 0xC0
-
-#define HDCP_2_2_HDMI_SUPPORT_MASK BIT(2)
-#define HDCP_2_2_RX_CAPS_VERSION_VAL 0x02
-#define HDCP_2_2_SEQ_NUM_MAX 0xFFFFFF
-#define HDCP_2_2_DELAY_BEFORE_ENCRYPTION_EN 200
-
-/* Below macros take a byte at a time and mask the bit(s) */
-#define HDCP_2_2_HDMI_RXSTATUS_LEN 2
-#define HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(x) ((x) & 0x3)
-#define HDCP_2_2_HDMI_RXSTATUS_READY(x) ((x) & BIT(2))
-#define HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(x) ((x) & BIT(3))
-
-/*
- * Helper functions to convert 24bit big endian hdcp sequence number to
- * host format and back
- */
-static inline
-u32 drm_hdcp_be24_to_cpu(const u8 seq_num[HDCP_2_2_SEQ_NUM_LEN])
-{
- return (u32)(seq_num[2] | seq_num[1] << 8 | seq_num[0] << 16);
-}
-
-static inline
-void drm_hdcp_cpu_to_be24(u8 seq_num[HDCP_2_2_SEQ_NUM_LEN], u32 val)
-{
- seq_num[0] = val >> 16;
- seq_num[1] = val >> 8;
- seq_num[2] = val;
-}
-
-#define DRM_HDCP_SRM_GEN1_MAX_BYTES (5 * 1024)
-#define DRM_HDCP_1_4_SRM_ID 0x8
-#define DRM_HDCP_SRM_ID_MASK (0xF << 4)
-#define DRM_HDCP_1_4_VRL_LENGTH_SIZE 3
-#define DRM_HDCP_1_4_DCP_SIG_SIZE 40
-#define DRM_HDCP_2_SRM_ID 0x9
-#define DRM_HDCP_2_INDICATOR 0x1
-#define DRM_HDCP_2_INDICATOR_MASK 0xF
-#define DRM_HDCP_2_VRL_LENGTH_SIZE 3
-#define DRM_HDCP_2_DCP_SIG_SIZE 384
-#define DRM_HDCP_2_NO_OF_DEV_PLUS_RESERVED_SZ 4
-#define DRM_HDCP_2_KSV_COUNT_2_LSBITS(byte) (((byte) & 0xC0) >> 6)
-
-struct hdcp_srm_header {
- u8 srm_id;
- u8 reserved;
- __be16 srm_version;
- u8 srm_gen_no;
-} __packed;
-
-struct drm_device;
-struct drm_connector;
-
-int drm_hdcp_check_ksvs_revoked(struct drm_device *dev,
- u8 *ksvs, u32 ksv_count);
-int drm_connector_attach_content_protection_property(
- struct drm_connector *connector, bool hdcp_content_type);
-void drm_hdcp_update_content_protection(struct drm_connector *connector,
- u64 val);
-
-/* Content Type classification for HDCP2.2 vs others */
-#define DRM_MODE_HDCP_CONTENT_TYPE0 0
-#define DRM_MODE_HDCP_CONTENT_TYPE1 1
-
-#endif
#include <linux/mutex.h>
#include <linux/device.h>
-#include <drm/drm_hdcp.h>
+#include <drm/display/drm_hdcp.h>
/**
* enum hdcp_port_type - HDCP port implementation type defined by ME FW
projects / kernel.git / commitdiff