Default connector property called "Content Protection" is added to
represent the content protection state of a connector and to
configure the same.
Userspace can request for enable or disable of content protection
on a connector. Set "DESIRED" for Enable and "UNDESIRED" for disable.
Content protection states defined:
DRM_MODE_CONTENT_PROTECTION_UNSUPPORTED - Unsupported
DRM_MODE_CONTENT_PROTECTION_UNDESIRED - Undesired
DRM_MODE_CONTENT_PROTECTION_DESIRED - Desired
DRM_MODE_CONTENT_PROTECTION_ENABLED - Enabled
v2: Redesigned the property to match with CP needs of CrOS [Sean].
v3: Renamed the state names. Header is removed [Sean].
v4: Aligned with existing userspace(CrOS's usage) [Sean].
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
drivers/gpu/drm/drm_connector.c | 24 ++++++++++++++++++++++++
include/drm/drm_mode_config.h | 5 +++++
include/uapi/drm/drm_mode.h | 7 +++++++
3 files changed, 36 insertions(+)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 8072e6e4c62c..f4ce0af63ad3 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -617,6 +617,14 @@ static const struct drm_prop_enum_list drm_link_status_enum_list[] = {
};
DRM_ENUM_NAME_FN(drm_get_link_status_name, drm_link_status_enum_list)
+static const struct drm_prop_enum_list drm_cp_enum_list[] = {
+ { DRM_MODE_CONTENT_PROTECTION_UNSUPPORTED, "Unsupported" },
+ { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" },
+ { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" },
+ { DRM_MODE_CONTENT_PROTECTION_ENABLED, "Enabled" },
+};
+DRM_ENUM_NAME_FN(drm_get_cp_status_name, drm_cp_enum_list)
+
/**
* drm_display_info_set_bus_formats - set the supported bus formats
* @info: display info to store bus formats in
@@ -741,6 +749,15 @@ DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
* value of link-status is "GOOD". If something fails during or after modeset,
* the kernel driver may set this to "BAD" and issue a hotplug uevent. Drivers
* should update this value using drm_mode_connector_set_link_status_property().
+ * Content Protection:
+ * Connector Content Protection property to indicate the content protection
+ * status of a connector. Default value is "UNDESIRED". Kernel will set
+ * to "UNSUPPORTED" if there is no common HDCP ver supported between Src
+ * and Sink. User space could set this to "DESIRED" to enabled the content
+ * protection on the connector. If content protection setup process is
+ * success, kernel will set this property to "ENABLED". To Disable the
+ * content protection on the connector userspace could set this property to
+ * "UNDESIRED".
*
* Connectors also have one standardized atomic property:
*
@@ -789,6 +806,13 @@ int drm_connector_create_standard_properties(struct drm_device *dev)
return -ENOMEM;
dev->mode_config.link_status_property = prop;
+ prop = drm_property_create_enum(dev, 0, "Content Protection",
+ drm_cp_enum_list,
+ ARRAY_SIZE(drm_cp_enum_list));
+ if (!prop)
+ return -ENOMEM;
+ dev->mode_config.cp_property = prop;
+
return 0;
}
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 42981711189b..72e2b4e6d51d 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -538,6 +538,11 @@ struct drm_mode_config {
*/
struct drm_property *link_status_property;
/**
+ * @cp_property: Default connector property for content protection
+ * status of a connector
+ */
+ struct drm_property *cp_property;
+ /**
* @plane_type_property: Default plane property to differentiate
* CURSOR, PRIMARY and OVERLAY legacy uses of planes.
*/
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 403339f98a92..61685a64cd6a 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -173,6 +173,13 @@ extern "C" {
DRM_MODE_REFLECT_X | \
DRM_MODE_REFLECT_Y)
+/* Content Protection options */
+enum cp_state {
+ DRM_MODE_CONTENT_PROTECTION_UNSUPPORTED = -1,
+ DRM_MODE_CONTENT_PROTECTION_UNDESIRED,
+ DRM_MODE_CONTENT_PROTECTION_DESIRED,
+ DRM_MODE_CONTENT_PROTECTION_ENABLED,
+};
struct drm_mode_modeinfo {
__u32 clock;
--
2.7.4
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