[03/10,RFC] v4l2-fh: implement v4l2_priority support.

Commit Message

Hans Verkuil Dec. 29, 2010, 9:43 p.m. UTC

None

Patch

diff --git a/drivers/media/video/v4l2-fh.c b/drivers/media/video/v4l2-fh.c
index d78f184..78a1608 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 1d72dde..5fc5ba9 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;
 };
 
 /*