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Commit 5ed470fe authored Apr 06, 2016 by Mauro Carvalho Chehab

[media] media: Improve documentation for link_setup/link_modify



Those callbacks are called with the media_device.graph_mutex held.

Add a note about that, as the code called by those notifiers should
not be touching in the mutex.

Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

parent e2c91d4d

include/media/media-device.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -311,7 +311,8 @@ struct media_entity_notify {
		* @enable_source: Enable Source Handler function pointer
		* @disable_source: Disable Source Handler function pointer
		*
		* @link_notify: Link state change notification callback
		* @link_notify: Link state change notification callback. This callback is
		* called with the graph_mutex held.
		*
		* This structure represents an abstract high-level media device. It allows easy
		* access to entities and provides basic media device-level support. The

include/media/media-entity.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -179,6 +179,9 @@ struct media_pad {
		* @link_validate: Return whether a link is valid from the entity point of
		* view. The media_entity_pipeline_start() function
		* validates all links by calling this operation. Optional.
		*
		* Note: Those these callbacks are called with struct media_device.@graph_mutex
		* mutex held.
		*/
		struct media_entity_operations {
		int (link_setup)(struct media_entity entity,