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authorHans Verkuil <hans.verkuil@cisco.com>2012-06-22 07:29:35 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-07-06 17:30:54 -0300
commit5a5adf6b669cf1a3dd2af419cd68a4c491f384a3 (patch)
tree42b1c4709c3c5cca04fb15bd369e6ae4921645d4 /include/media/v4l2-ioctl.h
parent5d44f5e3e388739f017a74e73dab2a995673915f (diff)
downloadlinux-5a5adf6b669cf1a3dd2af419cd68a4c491f384a3.tar.bz2
[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.h5
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[];