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 <k.debski@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
Documentation/DocBook/media/v4l/io.xml | 6 ++++++
include/uapi/linux/videodev2.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml
index 73f202f..40ee987 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 72e9921..d5a59af 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -697,6 +697,7 @@ 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
--
1.7.9.5
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