[v5,0/4] v4l2-dev/ioctl: Add V4L2_CAP_IO_MC

Message

Niklas Söderlund March 18, 2020, 1:25 p.m. UTC

Hi,

This series aims to reduce the amount of boiler plate code in video
device drivers who's inputs and/or outputs are controlled by the Media
Controller instead of the V4L2 API.

Patch 1/4 adds a new video device capability flag V4L2_CAP_IO_MC which
if set provides helper implementations for the enum inputs and outputs
ioctls freeing the video device driver from the need to implement them.

Patch 2/4, 3/4 and 4/4 converts the R-Car VIN, Intel IPU3 and VIMC 
drivers to use the new default handlers and capability flag and delete 
the now redundant boiler plate code. I'm sure more video device drivers
can make use of this new flag but as I can only test on these two
platforms I have limited my changes to those.

A separate patch to v4l-utils will be posted separately as [1] to add a 
test for this feature to v4l2-compliance.

1. [PATCH 0/2] v4l2-compliance: add tests for V4L2_CAP_IO_MC

Niklas Söderlund (4):
  v4l2-dev/ioctl: Add V4L2_CAP_IO_MC
  rcar-vin: Make use of V4L2_CAP_IO_MC
  staging/intel-ipu3: Make use of V4L2_CAP_IO_MC
  vimc: Make use of V4L2_CAP_IO_MC

 .../media/uapi/v4l/vidioc-querycap.rst        |  6 ++
 .../media/videodev2.h.rst.exceptions          |  1 +
 drivers/media/platform/rcar-vin/rcar-v4l2.c   | 17 +-----
 drivers/media/platform/vimc/vimc-capture.c    |  2 +-
 drivers/media/v4l2-core/v4l2-dev.c            | 25 ++++++--
 drivers/media/v4l2-core/v4l2-ioctl.c          | 57 ++++++++++++++++--
 drivers/staging/media/ipu3/ipu3-v4l2.c        | 58 +------------------
 include/uapi/linux/videodev2.h                |  2 +
 8 files changed, 84 insertions(+), 84 deletions(-)