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[media] media: v4l-core add enable/disable source common interfaces

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Add a new interfaces to be used by v4l-core to invoke enable
source and disable_source handlers in the media_device. The
enable_source helper function invokes the enable_source handler
to find media source entity connected to the entity and check
is it is available or busy. If source is available, link is
activated and pipeline is started. The disable_source helper
function invokes the disable_source handler to deactivate and
stop the pipeline.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Shuah Khan
2016-02-11 21:41:25 -02:00
committed by Mauro Carvalho Chehab
parent fb49f20438
commit d0a164f593
3 changed files with 100 additions and 1 deletions
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include/media/v4l2-dev.h
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@@ -87,6 +87,7 @@ struct video_device
#if defined(CONFIG_MEDIA_CONTROLLER)
struct media_entity entity;
struct media_intf_devnode *intf_devnode;
struct media_pipeline pipe;
#endif
/* device ops */
const struct v4l2_file_operations *fops;