Implemented drm_hdcp_update_change() for updating the current status to the hdcp_property value.
This will update the error status flag incase of encryption failure. Whenever there is a HDCP state change KOBJ_UEVENT will be broadcasted to notify the awaiting userspace consumers.
Signed-off-by: Ramalingam C ramalingam.c@intel.com --- drivers/gpu/drm/drm_hdcp.c | 40 ++++++++++++++++++++++++++++++++++++++++ include/drm/drm_hdcp.h | 3 +++ 2 files changed, 43 insertions(+)
diff --git a/drivers/gpu/drm/drm_hdcp.c b/drivers/gpu/drm/drm_hdcp.c index 9b3bf92..9785ab6 100644 --- a/drivers/gpu/drm/drm_hdcp.c +++ b/drivers/gpu/drm/drm_hdcp.c @@ -30,6 +30,46 @@ #include <drm/drm_hdcp.h> #include <drm/drm_dp_helper.h>
+/* + * drm_hdcp_update_change: + * Updating the HDCP property val along with uevent + * + * @hdcp: ptr to hdcp instance + * @enabled: status of HDCP encryption + * @status: Error status bits, if auth failed. + * @mute: uevent is mute or not + */ +static void drm_hdcp_update_change(struct drm_hdcp *hdcp, bool enabled, + uint64_t status, bool mute) +{ + struct drm_connector *connector = hdcp->connector; + char event_str[30]; + uint64_t temp_state; + + /* Mutex has to be acquired before entering this function */ + WARN_ON(!mutex_is_locked(&hdcp->mutex)); + temp_state = connector->hdcp_state; + + if (enabled) { + temp_state &= ~(DRM_HDCP_ENABLE | DRM_HDCP_TYPE_MASK + | DRM_HDCP_STATUS_MASK); + temp_state |= hdcp->req_state; + } else { + temp_state &= DRM_HDCP_VER_SUPPORT_MASK; + temp_state |= (status & DRM_HDCP_STATUS_MASK); + } + + connector->hdcp_state = temp_state; + + if (!mute) { + sprintf(event_str, "HDCP=0x%llx", connector->hdcp_state); + + /* Generating the uevent with custom string */ + drm_sysfs_generate_uevent(hdcp->connector->dev, event_str); + } +} + + int drm_hdcp_enable(struct drm_connector *connector, uint8_t stream_type) { struct drm_hdcp *hdcp = connector->hdcp; diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index eb7149b..d5adbf5 100644 --- a/include/drm/drm_hdcp.h +++ b/include/drm/drm_hdcp.h @@ -163,6 +163,9 @@ struct drm_hdcp { #define DRM_HDCP_TYPE_SHIFT 4 #define DRM_HDCP_TYPE_MASK (0xFFULL<<DRM_HDCP_TYPE_SHIFT)
+#define DRM_HDCP_STATUS_SHIFT 20 +#define DRM_HDCP_STATUS_MASK (0xFULL<<DRM_HDCP_STATUS_SHIFT) + /* Functions exported */ extern int drm_hdcp_init(struct drm_connector *connector, struct drm_hdcp *hdcp,