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[media] media: Always keep a graph walk large enough around

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Re-create the graph walk object as needed in order to have one large enough
available for all entities in the graph.

This enumeration is used for pipeline power management in the future.

[[email protected]: fix documentation bug:
 " warning: bad line: graph_mutex"]

Signed-off-by: Sakari Ailus <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Sakari Ailus 2016-02-21 13:25:08 -03:00 • committed by Mauro Carvalho Chehab
commit 0c426c472b
2 changed files with 24 additions and 0 deletions
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3
include/media/media-device.h
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@ -306,6 +306,8 @@ struct media_entity_notify {
* @entity_notify: List of registered entity_notify callbacks
* @lock: Entities list lock
* @graph_mutex: Entities graph operation lock
* @pm_count_walk: Graph walk for power state walk. Access serialised using
* graph_mutex.
*
* @source_priv: Driver Private data for enable/disable source handlers
* @enable_source: Enable Source Handler function pointer
@ -373,6 +375,7 @@ struct media_device {
spinlock_t lock;
/* Serializes graph operations. */
struct mutex graph_mutex;
struct media_entity_graph pm_count_walk;
void *source_priv;
int (*enable_source)(struct media_entity *entity,