[media] v4l: events: Define V4L2_EVENT_FRAME_SYNC

Define a frame sync event to tell user space when the reception of a frame
starts.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index fca24cc50436..a5359c6e7577 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -2006,6 +2006,7 @@ struct v4l2_streamparm {
 #define V4L2_EVENT_VSYNC                        1
 #define V4L2_EVENT_EOS                          2
 #define V4L2_EVENT_CTRL                         3
+#define V4L2_EVENT_FRAME_SYNC                   4
 #define V4L2_EVENT_PRIVATE_START                0x08000000
 
 /* Payload for V4L2_EVENT_VSYNC */
@@ -2032,12 +2033,17 @@ struct v4l2_event_ctrl {
         __s32 default_value;
 };
 
+struct v4l2_event_frame_sync {
+        __u32 frame_sequence;
+};
+
 struct v4l2_event {
         __u32                           type;
         union {
-                struct v4l2_event_vsync vsync;
-                struct v4l2_event_ctrl  ctrl;
-                __u8                    data[64];
+                struct v4l2_event_vsync         vsync;
+                struct v4l2_event_ctrl          ctrl;
+                struct v4l2_event_frame_sync    frame_sync;
+                __u8                            data[64];
         } u;
         __u32                           pending;
         __u32                           sequence;