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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2018-08-28 11:11:04 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-09-11 15:58:43 +0200 |
| commit | d4215edbd4b170b207b0e5a1d8ae42fb49f5c470 (patch) | |
| tree | db1df36c81efab414012420efe3f28a868f1c754 /Documentation/media/uapi/v4l/vidioc-qbuf.rst | |
| parent | media: media-request: EPERM -> EACCES/EBUSY (diff) | |
| download | linux-d4215edbd4b170b207b0e5a1d8ae42fb49f5c470.tar.xz linux-d4215edbd4b170b207b0e5a1d8ae42fb49f5c470.zip | |
media: media-request: update documentation
Various clarifications and readability improvements based on
Laurent Pinchart's review of the documentation.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'Documentation/media/uapi/v4l/vidioc-qbuf.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/vidioc-qbuf.rst | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/media/uapi/v4l/vidioc-qbuf.rst b/Documentation/media/uapi/v4l/vidioc-qbuf.rst index e619fc80a323..753b3b5946b1 100644 --- a/Documentation/media/uapi/v4l/vidioc-qbuf.rst +++ b/Documentation/media/uapi/v4l/vidioc-qbuf.rst @@ -111,7 +111,10 @@ then ``EINVAL`` will be returned. .. caution:: It is not allowed to mix queuing requests with queuing buffers directly. ``EBUSY`` will be returned if the first buffer was queued directly and - then the application tries to queue a request, or vice versa. + then the application tries to queue a request, or vice versa. After + closing the file descriptor, calling + :ref:`VIDIOC_STREAMOFF <VIDIOC_STREAMON>` or calling :ref:`VIDIOC_REQBUFS` + the check for this will be reset. For :ref:`memory-to-memory devices <codec>` you can specify the ``request_fd`` only for output buffers, not for capture buffers. Attempting |