[0/3] vb2: add requires_requests bitfield

Message

Hans Verkuil Feb. 11, 2019, 9:18 a.m. UTC

Currently the supports_requests bitfield only indicates if the
Request API is supported by the vb2_queue. But for stateless
codecs the use of the Request API is actually a requirement.

So add a requires_requests bitfield and corresponding capability
to indicate that userspace has to use requests. And of course
reject direct VIDIOC_QBUF calls (i.e. V4L2_BUF_FLAG_REQUEST_FD
isn't set) if requires_requests is set.

Finally set this bitfield in the cedrus driver.

Regards,

	Hans

Hans Verkuil (3):
  vb2: add requires_requests bit for stateless codecs
  videodev2.h: add V4L2_BUF_CAP_REQUIRES_REQUESTS
  cedrus: set requires_requests

 Documentation/media/uapi/v4l/vidioc-reqbufs.rst   | 4 ++++
 drivers/media/common/videobuf2/videobuf2-core.c   | 5 ++++-
 drivers/media/common/videobuf2/videobuf2-v4l2.c   | 6 ++++++
 drivers/staging/media/sunxi/cedrus/cedrus_video.c | 1 +
 include/media/videobuf2-core.h                    | 3 +++
 include/uapi/linux/videodev2.h                    | 1 +
 6 files changed, 19 insertions(+), 1 deletion(-)