[PATCH v2 08/10] v4l: Add signal lock status to source change events

[Steve Longerbeam]

Add a signal lock status change to the source changes bitmask.
This indicates there was a signal lock or unlock event detected
at the input of a video decoder.

Signed-off-by: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
---
 Documentation/DocBook/media/v4l/vidioc-dqevent.xml | 12 ++++++++++--
 include/uapi/linux/videodev2.h                     |  1 +
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Documentation/DocBook/media/v4l/vidioc-dqevent.xml b/Documentation/DocBook/media/v4l/vidioc-dqevent.xml
index c9c3c77..7758ad7 100644
--- a/Documentation/DocBook/media/v4l/vidioc-dqevent.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-dqevent.xml
@@ -233,8 +233,9 @@
 	    <entry>
 	      <para>This event is triggered when a source parameter change is
 	       detected during runtime by the video device. It can be a
-	       runtime resolution change triggered by a video decoder or the
-	       format change happening on an input connector.
+	       runtime resolution change or signal lock status change
+	       triggered by a video decoder, or the format change happening
+	       on an input connector.
 	       This event requires that the <structfield>id</structfield>
 	       matches the input index (when used with a video device node)
 	       or the pad index (when used with a subdevice node) from which
@@ -461,6 +462,13 @@
 	    from a video decoder.
 	    </entry>
 	  </row>
+	  <row>
+	    <entry><constant>V4L2_EVENT_SRC_CH_LOCK_STATUS</constant></entry>
+	    <entry>0x0002</entry>
+	    <entry>This event gets triggered when there is a signal lock or
+	    unlock detected at the input of a video decoder.
+	    </entry>
+	  </row>
 	</tbody>
       </tgroup>
     </table>
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 724f43e..08a153f 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -2078,6 +2078,7 @@ struct v4l2_event_frame_sync {
 };
 
 #define V4L2_EVENT_SRC_CH_RESOLUTION		(1 << 0)
+#define V4L2_EVENT_SRC_CH_LOCK_STATUS		(1 << 1)
 
 struct v4l2_event_src_change {
 	__u32 changes;
-- 
1.9.1