diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml
index e6c58559ca6b..2c4c068dde83 100644
--- a/Documentation/DocBook/media/v4l/io.xml
+++ b/Documentation/DocBook/media/v4l/io.xml
@@ -1145,6 +1145,12 @@ in which case caches have not been used.</entry>
 	    same clock outside V4L2, use
 	    <function>clock_gettime(2)</function> .</entry>
 	  </row>
+	  <row>
+	    <entry><constant>V4L2_BUF_FLAG_TIMESTAMP_COPY</constant></entry>
+	    <entry>0x4000</entry>
+	    <entry>The CAPTURE buffer timestamp has been taken from the
+	    corresponding OUTPUT buffer. This flag applies only to mem2mem devices.</entry>
+	  </row>
 	</tbody>
       </tgroup>
     </table>
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 234d1d870914..b5f5cddcf1c3 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -705,6 +705,7 @@ struct v4l2_buffer {
 #define V4L2_BUF_FLAG_TIMESTAMP_MASK		0xe000
 #define V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN		0x0000
 #define V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC	0x2000
+#define V4L2_BUF_FLAG_TIMESTAMP_COPY		0x4000
 
 /**
  * struct v4l2_exportbuffer - export of video buffer as DMABUF file descriptor