[media] v4l2-fh: implement v4l2_priority support

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 5 insertions, 0 deletions

diff --git a/drivers/media/video/v4l2-fh.c b/drivers/media/video/v4l2-fh.c
index d78f184f40c5..78a1608a09d6 100644
--- a/drivers/media/video/v4l2-fh.c
+++ b/drivers/media/video/v4l2-fh.c
@@ -33,6 +33,8 @@ int v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev)
         fh->vdev = vdev;
         INIT_LIST_HEAD(&fh->list);
         set_bit(V4L2_FL_USES_V4L2_FH, &fh->vdev->flags);
+        fh->prio = V4L2_PRIORITY_UNSET;
+        BUG_ON(vdev->prio == NULL);
 
         /*
          * fh->events only needs to be initialized if the driver
@@ -51,6 +53,7 @@ void v4l2_fh_add(struct v4l2_fh *fh)
 {
         unsigned long flags;
 
+        v4l2_prio_open(fh->vdev->prio, &fh->prio);
         spin_lock_irqsave(&fh->vdev->fh_lock, flags);
         list_add(&fh->list, &fh->vdev->fh_list);
         spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
@@ -64,6 +67,7 @@ void v4l2_fh_del(struct v4l2_fh *fh)
         spin_lock_irqsave(&fh->vdev->fh_lock, flags);
         list_del_init(&fh->list);
         spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
+        v4l2_prio_close(fh->vdev->prio, fh->prio);
 }
 EXPORT_SYMBOL_GPL(v4l2_fh_del);
 
diff --git a/include/media/v4l2-fh.h b/include/media/v4l2-fh.h
index 1d72dde320bf..5fc5ba96e1d2 100644
--- a/include/media/v4l2-fh.h
+++ b/include/media/v4l2-fh.h
@@ -35,6 +35,7 @@ struct v4l2_fh {
         struct list_head        list;
         struct video_device     *vdev;
         struct v4l2_events      *events; /* events, pending and subscribed */
+        enum v4l2_priority      prio;
 };
 
 /*