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[v7,0/6] v4l2-dev/ioctl: Add V4L2_CAP_IO_MC

Message ID 20200413202351.1359754-1-niklas.soderlund+renesas@ragnatech.se
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Series v4l2-dev/ioctl: Add V4L2_CAP_IO_MC | expand

Message

Niklas Söderlund April 13, 2020, 8:23 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 1/6 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 2/6 fix initialization of reserved fields in the ivtv driver which 
becomes a problem in 3/6 where Laurent adds mbus filters to 
VIDIOC_ENUM_FMT.

Patch 4/6, 5/6 and 6/6 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 have been posted as [1] to add a
test for this feature in v4l2-compliance.

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

Laurent Pinchart (1):
  media: v4l2: Extend VIDIOC_ENUM_FMT to support MC-centric devices

Niklas Söderlund (5):
  v4l2-dev/ioctl: Add V4L2_CAP_IO_MC
  ivtv-ioctl.c: Do not initialize the reserved field of struct
    v4l2_fmtdesc
  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-enum-fmt.rst        | 17 ++++-
 .../media/uapi/v4l/vidioc-querycap.rst        |  6 ++
 .../media/videodev2.h.rst.exceptions          |  1 +
 drivers/media/pci/ivtv/ivtv-ioctl.c           |  4 --
 drivers/media/platform/rcar-vin/rcar-v4l2.c   | 40 ++++++-----
 drivers/media/platform/vimc/vimc-capture.c    | 10 ++-
 drivers/media/v4l2-core/v4l2-dev.c            | 25 +++++--
 drivers/media/v4l2-core/v4l2-ioctl.c          | 70 +++++++++++++++++--
 drivers/staging/media/ipu3/ipu3-v4l2.c        | 64 ++---------------
 include/uapi/linux/videodev2.h                |  5 +-
 10 files changed, 147 insertions(+), 95 deletions(-)