Some devices requires indicator if the buffer is the last one in the stream.
Applications and drivers can use this flag in such case.
Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
Documentation/DocBook/media/v4l/io.xml | 7 +++++++
Documentation/DocBook/media/v4l/vidioc-qbuf.xml | 2 ++
include/linux/videodev2.h | 1 +
3 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml
index fd6aca2..dcbf1e0 100644
--- a/Documentation/DocBook/media/v4l/io.xml
+++ b/Documentation/DocBook/media/v4l/io.xml
@@ -956,6 +956,13 @@ Typically applications shall use this flag for output buffers if the data
in this buffer has not been created by the CPU but by some DMA-capable unit,
in which case caches have not been used.</entry>
</row>
+ <row>
+ <entry><constant>V4L2_BUF_FLAG_EOS</constant></entry>
+ <entry>0x2000</entry>
+ <entry>Application should set this flag in the output buffer
+in order to inform the driver about the last frame of the stream. Some
+drivers may require it to properly finish processing the stream.</entry>
+ </row>
</tbody>
</tgroup>
</table>
diff --git a/Documentation/DocBook/media/v4l/vidioc-qbuf.xml b/Documentation/DocBook/media/v4l/vidioc-qbuf.xml
index 9caa49a..ad49f7d 100644
--- a/Documentation/DocBook/media/v4l/vidioc-qbuf.xml
+++ b/Documentation/DocBook/media/v4l/vidioc-qbuf.xml
@@ -76,6 +76,8 @@ supports capturing from specific video inputs and you want to specify a video
input, then <structfield>flags</structfield> should be set to
<constant>V4L2_BUF_FLAG_INPUT</constant> and the field
<structfield>input</structfield> must be initialized to the desired input.
+Some drivers expects applications set <constant>V4L2_BUF_FLAG_EOS</constant>
+flag on the last buffer of the stream.
The <structfield>reserved</structfield> field must be set to 0. When using
the <link linkend="planar-apis">multi-planar API</link>, the
<structfield>m.planes</structfield> field must contain a userspace pointer
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 370d111..e44a7cd 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -676,6 +676,7 @@ struct v4l2_buffer {
/* Cache handling flags */
#define V4L2_BUF_FLAG_NO_CACHE_INVALIDATE 0x0800
#define V4L2_BUF_FLAG_NO_CACHE_CLEAN 0x1000
+#define V4L2_BUF_FLAG_EOS 0x2000 /* The last buffer in the stream */
/*
* O V E R L A Y P R E V I E W
--
1.7.0.4
--
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