[media] DocBook: document new v4l motion detection event

Document the new motion detection event.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Documentation/DocBook/media/v4l/vidioc-dqevent.xml

@@ -92,6 +92,12 @@
             <entry><structfield>frame_sync</structfield></entry>
 	    <entry>Event data for event V4L2_EVENT_FRAME_SYNC.</entry>
 	  </row>
+	  <row>
+	    <entry></entry>
+	    <entry>&v4l2-event-motion-det;</entry>
+            <entry><structfield>motion_det</structfield></entry>
+	    <entry>Event data for event V4L2_EVENT_MOTION_DET.</entry>
+	  </row>
 	  <row>
 	    <entry></entry>
 	    <entry>__u8</entry>
@@ -258,6 +264,44 @@
       </tgroup>
     </table>
 
+    <table frame="none" pgwide="1" id="v4l2-event-motion-det">
+      <title>struct <structname>v4l2_event_motion_det</structname></title>
+      <tgroup cols="3">
+	&cs-str;
+	<tbody valign="top">
+	  <row>
+	    <entry>__u32</entry>
+	    <entry><structfield>flags</structfield></entry>
+	    <entry>
+	      Currently only one flag is available: if <constant>V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ</constant>
+	      is set, then the <structfield>frame_sequence</structfield> field is valid,
+	      otherwise that field should be ignored.
+	    </entry>
+	  </row>
+	  <row>
+	    <entry>__u32</entry>
+	    <entry><structfield>frame_sequence</structfield></entry>
+	    <entry>
+	      The sequence number of the frame being received. Only valid if the
+	      <constant>V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ</constant> flag was set.
+	    </entry>
+	  </row>
+	  <row>
+	    <entry>__u32</entry>
+	    <entry><structfield>region_mask</structfield></entry>
+	    <entry>
+	      The bitmask of the regions that reported motion. There is at least one
+	      region. If this field is 0, then no motion was detected at all.
+	      If there is no <constant>V4L2_CID_DETECT_MD_REGION_GRID</constant> control
+	      (see <xref linkend="detect-controls" />) to assign a different region
+	      to each cell in the motion detection grid, then that all cells
+	      are automatically assigned to the default region 0.
+	    </entry>
+	  </row>
+	</tbody>
+      </tgroup>
+    </table>
+
     <table pgwide="1" frame="none" id="changes-flags">
       <title>Changes</title>
       <tgroup cols="3">

Documentation/DocBook/media/v4l/vidioc-subscribe-event.xml

@@ -174,6 +174,14 @@
 	      will have the ORed value of all the events generated.</para>
 	    </entry>
 	  </row>
+	  <row>
+	    <entry><constant>V4L2_EVENT_MOTION_DET</constant></entry>
+	    <entry>5</entry>
+	    <entry>
+	      <para>Triggered whenever the motion detection state for one or more of the regions
+	      changes. This event has a &v4l2-event-motion-det; associated with it.</para>
+	    </entry>
+	  </row>
 	  <row>
 	    <entry><constant>V4L2_EVENT_PRIVATE_START</constant></entry>
 	    <entry>0x08000000</entry>