drm function is defined and exported to update a connector's content protection property state and to generate a uevent along with it.
Need ACK for the uevent from userspace consumer.
v2: Update only when state is different from old one. v3: KDoc is added [Daniel]
Signed-off-by: Ramalingam C ramalingam.c@intel.com Reviewed-by: Daniel Vetter daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_hdcp.c | 32 ++++++++++++++++++++++++++++++++ include/drm/drm_hdcp.h | 2 ++ 2 files changed, 34 insertions(+)
diff --git a/drivers/gpu/drm/drm_hdcp.c b/drivers/gpu/drm/drm_hdcp.c index 75402463466b..f29b7abda51f 100644 --- a/drivers/gpu/drm/drm_hdcp.c +++ b/drivers/gpu/drm/drm_hdcp.c @@ -372,6 +372,10 @@ DRM_ENUM_NAME_FN(drm_get_hdcp_content_type_name, * * 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. */ @@ -412,3 +416,31 @@ int drm_connector_attach_content_protection_property( 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 change of a drm_connector. 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); diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index 2970abdfaf12..dd864ac9ce85 100644 --- a/include/drm/drm_hdcp.h +++ b/include/drm/drm_hdcp.h @@ -292,4 +292,6 @@ bool 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