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| author | Sakari Ailus <sakari.ailus@iki.fi> | 2015-12-16 14:32:29 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-01-11 15:19:20 +0100 |
| commit | 74a4133079f739eb2f4604263fdb974ce10120a8 (patch) | |
| tree | 4ac54a75024a8316f7c5427224d27f69923024e4 /drivers | |
| parent | [media] media: Use entity enums in graph walk (diff) | |
| download | linux-74a4133079f739eb2f4604263fdb974ce10120a8.tar.xz linux-74a4133079f739eb2f4604263fdb974ce10120a8.zip | |
[media] media: Keep using the same graph walk object for a given pipeline
Initialise a given graph walk object once, and then keep using it whilst
the same pipeline is running. Once the pipeline is stopped, release the
graph walk object.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/media-entity.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c index 86a8396f6ec2..3cad525c2ac1 100644 --- a/drivers/media/media-entity.c +++ b/drivers/media/media-entity.c @@ -379,10 +379,10 @@ __must_check int media_entity_pipeline_start(struct media_entity *entity, mutex_lock(&mdev->graph_mutex); - ret = media_entity_graph_walk_init(&pipe->graph, mdev); - if (ret) { - mutex_unlock(&mdev->graph_mutex); - return ret; + if (!pipe->streaming_count++) { + ret = media_entity_graph_walk_init(&pipe->graph, mdev); + if (ret) + goto error_graph_walk_start; } media_entity_graph_walk_start(&pipe->graph, entity); @@ -483,7 +483,9 @@ error: break; } - media_entity_graph_walk_cleanup(graph); +error_graph_walk_start: + if (!--pipe->streaming_count) + media_entity_graph_walk_cleanup(graph); mutex_unlock(&mdev->graph_mutex); @@ -495,9 +497,11 @@ void media_entity_pipeline_stop(struct media_entity *entity) { struct media_device *mdev = entity->graph_obj.mdev; struct media_entity_graph *graph = &entity->pipe->graph; + struct media_pipeline *pipe = entity->pipe; mutex_lock(&mdev->graph_mutex); + WARN_ON(!pipe->streaming_count); media_entity_graph_walk_start(graph, entity); while ((entity = media_entity_graph_walk_next(graph))) { @@ -506,7 +510,8 @@ void media_entity_pipeline_stop(struct media_entity *entity) entity->pipe = NULL; } - media_entity_graph_walk_cleanup(graph); + if (!--pipe->streaming_count) + media_entity_graph_walk_cleanup(graph); mutex_unlock(&mdev->graph_mutex); } |