[RFC,0/3] media: v4l2: Add extended fmt and buffer ioctls

Message

Boris Brezillon March 19, 2019, 2:52 p.m. UTC

Hello,

This RFC follows the discussion started by Hans [1] a few months back.
It does not try to address all the problem reported in this thread but
instead focuses on the FMT and BUF(S) ioctls.

Note that my primary goal is to unify handling for multiplanar and
singleplanar formats and extend things to support the "single dmabuf
storing all pixel planes" issue.

This is just preliminary work, and nothing has been tested yet (still
patching the VB2/VIVID code to test everything), but it should give
a good idea of what the new APIs could look like. I hope to get
feedback early on so I can adjust the structs/hooks before going into
heavy refactoring of the VB2 core (and drivers depending on the VB2
helpers).

One last thing, I'm new to the media/v4l2 subsystem, so I likely got a
few things wrong.

Regards,

Boris

[1]https://www.mail-archive.com/[e-mail]/msg135729.html

Boris Brezillon (2):
  media: v4l2: Get rid of ->vidioc_enum_fmt_vid_{cap,out}_mplane
  media: v4l2: Extend pixel formats to unify single/multi-planar
    handling (and more)

Hans Verkuil (1):
  media: v4l2: Add extended buffer operations

 drivers/media/pci/intel/ipu3/ipu3-cio2.c      |   2 +-
 drivers/media/platform/exynos-gsc/gsc-m2m.c   |   4 +-
 .../media/platform/exynos4-is/fimc-capture.c  |   2 +-
 .../platform/exynos4-is/fimc-isp-video.c      |   2 +-
 drivers/media/platform/exynos4-is/fimc-lite.c |   2 +-
 drivers/media/platform/exynos4-is/fimc-m2m.c  |   4 +-
 .../media/platform/mtk-jpeg/mtk_jpeg_core.c   |   4 +-
 drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c  |   4 +-
 .../platform/mtk-vcodec/mtk_vcodec_dec.c      |   4 +-
 .../platform/mtk-vcodec/mtk_vcodec_enc.c      |   4 +-
 .../media/platform/qcom/camss/camss-video.c   |   2 +-
 drivers/media/platform/qcom/venus/vdec.c      |   4 +-
 drivers/media/platform/qcom/venus/venc.c      |   4 +-
 drivers/media/platform/rcar_fdp1.c            |   4 +-
 drivers/media/platform/rcar_jpu.c             |   4 +-
 drivers/media/platform/renesas-ceu.c          |   2 +-
 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c  |   4 +-
 drivers/media/platform/s5p-mfc/s5p_mfc_enc.c  |   4 +-
 drivers/media/platform/ti-vpe/vpe.c           |   4 +-
 drivers/media/platform/vicodec/vicodec-core.c |   2 -
 drivers/media/platform/vivid/vivid-core.c     |   6 +-
 .../media/platform/vivid/vivid-vid-common.c   |  20 -
 .../media/platform/vivid/vivid-vid-common.h   |   2 -
 drivers/media/v4l2-core/v4l2-common.c         | 281 ++++++
 drivers/media/v4l2-core/v4l2-dev.c            |  32 +-
 drivers/media/v4l2-core/v4l2-ioctl.c          | 831 +++++++++++++++---
 drivers/staging/media/ipu3/ipu3-v4l2.c        |   4 +-
 .../media/rockchip/vpu/rockchip_vpu_enc.c     |   4 +-
 include/media/v4l2-common.h                   |  12 +
 include/media/v4l2-ioctl.h                    |  65 +-
 include/uapi/linux/videodev2.h                | 207 +++++
 31 files changed, 1332 insertions(+), 198 deletions(-)