@@ -84,6 +84,24 @@ struct media_device {
/* Serializes graph operations. */
struct mutex graph_mutex;
+ /* Handlers to find source entity for the sink entity and
+ * check if it is available, and activate the link using
+ * media_entity_setup_link() interface and start pipeline
+ * from the source to the entity.
+ * Bridge driver is expected to implement and set the
+ * handler when media_device is registered or when
+ * bridge driver finds the media_device during probe.
+ * Bridge driver sets source_priv with information
+ * necessary to run enable/disable source handlers.
+ *
+ * Use-case: find tuner entity connected to the decoder
+ * entity and check if it is available, and activate the
+ * using media_entity_setup_link() if it is available.
+ */
+ void *source_priv;
+ int (*enable_source)(struct media_entity *entity,
+ struct media_pipeline *pipe);
+ void (*disable_source)(struct media_entity *entity);
int (*link_notify)(struct media_link *link, u32 flags,
unsigned int notification);
};
Add new fields to struct media_device to add enable_source, and disable_source handlers, and source_priv to stash driver private data that is need to run these handlers. The enable_source handler finds source entity for the passed in entity and check if it is available, and activate the link using __media_entity_setup_link() interface. Bridge driver is expected to implement and set these handlers and private data when media_device is registered or when bridge driver finds the media_device during probe. This is to enable the use-case to find tuner entity connected to the decoder entity and check if it is available, and activate it and start pipeline between the source and the entity. The disable_source handler deactivates the link and stops the pipeline. This handler can be invoked from the media core (v4l-core, dvb-core) as well as other drivers such as ALSA that control the media device. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> --- include/media/media-device.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)