V4L/DVB: V4L: Events: Add backend
Add event handling backend to V4L2. The backend handles event subscription
and delivery to file handles. Event subscriptions are based on file handle.
Events may be delivered to all subscribed file handles on a device
independent of where they originate from.
Signed-off-by: Sakari Ailus <sakari.ailus@maxwell.research.nokia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/v4l2-fh.c b/drivers/media/video/v4l2-fh.c
index 93ea0af..aab2fb6 100644
--- a/drivers/media/video/v4l2-fh.c
+++ b/drivers/media/video/v4l2-fh.c
@@ -25,6 +25,8 @@
#include <linux/bitops.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
int v4l2_fh_init(struct v4l2_fh *fh, struct video_device *vdev)
{
@@ -32,7 +34,7 @@
INIT_LIST_HEAD(&fh->list);
set_bit(V4L2_FL_USES_V4L2_FH, &fh->vdev->flags);
- return 0;
+ return v4l2_event_init(fh);
}
EXPORT_SYMBOL_GPL(v4l2_fh_init);
@@ -62,5 +64,7 @@
return;
fh->vdev = NULL;
+
+ v4l2_event_free(fh);
}
EXPORT_SYMBOL_GPL(v4l2_fh_exit);