[PATCH v2, 0/2] This patchset add Read-only(Ro) request for capture queue
ezequiel at vanguardiasur.com.ar
Tue Jun 23 14:43:47 EDT 2020
Thanks for the patch.
On Sun, 21 Jun 2020 at 22:55, Yunfei Dong <yunfei.dong at mediatek.com> wrote:
> User driver need to get HDR10+ information for each capture buffer;
> For some encoder cases, user driver need to get encoded message for
> each frame. So add support read-only(Ro) request for capture queue.
> Ro request mean that user driver just can get ext ctrls, set ext ctrls
> is not not allowed. Ro Request also can be used in output queue.
> There is not upstream driver to use this feature at now, but we are
> developing internal driver to use it. If it is ready, we will try to
> upstream vdec/venc driver based on this feature.
An upstream driver using the feature would be important, but it would
be nice to also have: an open-source userspace application,
and a proper explanation in the stateless decoder interface specification.
> Change compared to v1:
> -change commit message of patch 01/02
> -change commit message of patch 02/02
> Yunfei Dong (2):
> media: v4l UAPI: add V4L2_BUF_CAP_SUPPORTS_RO_REQUESTS
> media: v4l: Add Ro request api for capture queue
> .../media/v4l/vidioc-reqbufs.rst | 4 +
> .../media/common/videobuf2/videobuf2-v4l2.c | 7 ++
> drivers/media/mc/mc-request.c | 10 +-
> drivers/media/v4l2-core/v4l2-ctrls.c | 107 +++++++++++++++---
> drivers/media/v4l2-core/v4l2-ioctl.c | 22 ++++
> drivers/media/v4l2-core/v4l2-mem2mem.c | 19 ++--
> include/media/v4l2-ctrls.h | 22 +++-
> include/media/v4l2-fh.h | 2 +
> include/media/videobuf2-core.h | 2 +
> include/uapi/linux/videodev2.h | 1 +
> 10 files changed, 158 insertions(+), 38 deletions(-)
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