[media] v4l: Define video buffer flag for the COPY timestamp type

Define video buffer flag for the COPY timestamp. In this case the timestamp
value is copied from the OUTPUT to the corresponding CAPTURE buffer.

Signed-off-by: Kamil Debski <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Reviewed-by: Sylwester Nawrocki <[email protected]>
Acked-by: Hans Verkuil <[email protected]>
Signed-off-by: Sylwester Nawrocki <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml
index e6c58559ca6b81468895dd7cdcfcc1092f440e5c..2c4c068dde83f26d723382e7c1765b9a4ef95653 100644 (file)
--- 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 234d1d87091435e697d149c1da397bd9fc9b3f0e..b5f5cddcf1c3e6f92a3a5f266cfeae70b7d32ccb 100644 (file)
--- 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