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| author |   Hans Verkuil <hans.verkuil@cisco.com> | 2012-06-22 07:29:35 -0300 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-07-06 17:30:54 -0300 |
| commit | 5a5adf6b669cf1a3dd2af419cd68a4c491f384a3 (patch) | |
| tree | 42b1c4709c3c5cca04fb15bd369e6ae4921645d4 /include/media/v4l2-ioctl.h | |
| parent | [media] Spec: document CREATE_BUFS behavior if count == 0 (diff) | |
| download | linux-dev-5a5adf6b669cf1a3dd2af419cd68a4c491f384a3.tar.xz linux-dev-5a5adf6b669cf1a3dd2af419cd68a4c491f384a3.zip | |
[media] v4l2-dev/ioctl.c: add vb2_queue support to video_device
This prepares struct video_device for easier integration with vb2.
It also introduces a new lock that protects the vb2_queue. It is up
to the driver to use it or not. And the driver can associate an owner
filehandle with the queue to check whether queuing requests are
permitted for the calling filehandle.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'include/media/v4l2-ioctl.h')
| -rw-r--r-- | include/media/v4l2-ioctl.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/media/v4l2-ioctl.h b/include/media/v4l2-ioctl.h index dfd984f10d42..19e93523c2d8 100644 --- a/include/media/v4l2-ioctl.h +++ b/include/media/v4l2-ioctl.h @@ -304,6 +304,11 @@ extern int v4l2_video_std_construct(struct v4l2_standard *vs, then do printk(KERN_DEBUG "%s: ", prefix) first. */ extern void v4l_printk_ioctl(const char *prefix, unsigned int cmd); +/* Internal use only: get the mutex (if any) that we need to lock for the + given command. */ +struct video_device; +extern struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd); + /* names for fancy debug output */ extern const char *v4l2_field_names[]; extern const char *v4l2_type_names[]; |