Re: [PATCH v7 00/11] VP9 codec V4L2 control interface

[Nicolas Dufresne]

Hi Hans,

Le jeudi 11 novembre 2021 à 15:44 +0100, Hans Verkuil a écrit :
> Hi all,
> 
> Andrzej, Jernej, Nicolas, if none of you (or anyone else for that matter)
> objects, then I'll make a PR for this early next week.

I have no objection. I've myself delayed replying as we have been digging a lot
into our compliance failures, but I believe we have explained most of them by
now and nothing seems to be related to the API.

regards,
Nicolas

> 
> Regards,
> 
> 	Hans
> 
> On 29/09/2021 18:04, Andrzej Pietrasiewicz wrote:
> > Dear all,
> > 
> > This patch series adds VP9 codec V4L2 control interface and two drivers
> > using the new controls. It is a follow-up of previous v6 series [1].
> > 
> > In this iteration, we've implemented VP9 hardware decoding on two devices:
> > Rockchip VDEC and Hantro G2, and tested on RK3399, i.MX8MQ and i.MX8MP.
> > The i.MX8M driver needs proper power domains support, though, which is a
> > subject of a different effort, but in all 3 cases we were able to run the
> > drivers.
> > 
> > GStreamer support is also available, the needed changes have been submitted
> > by Daniel Almeida [2]. This MR is ready to be merged, and just needs the
> > VP9 V4L2 controls to be merged and released.
> > 
> > Both rkvdec and hantro drivers are passing a significant number of VP9 tests
> > using Fluster[3]. There are still a few tests that are not passing, due to
> > dynamic frame resize (not yet supported by V4L2) and small size videos
> > (due to IP block limitations).
> > 
> > The series adds the VP9 codec V4L2 control API as uAPI, so it aims at being
> > merged without passing through staging, as agreed[4]. The ABI has been checked
> > for padding and verified to contain no holes.
> > 
> > [1] https://patchwork.linuxtv.org/project/linux-media/list/?series=6377
> > [2] https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2144
> > [3] https://github.com/fluendo/fluster
> > [4] https://lore.kernel.org/linux-media/b8f83c93-67fd-09f5-9314-15746cbfdc61@xxxxxxxxx/
> > 
> > The series depends on the YUV tiled format support prepared by Ezequiel:
> > https://www.spinics.net/lists/linux-media/msg197047.html
> > 
> > Rebased onto latest media_tree.
> > 
> > Changes related to v6:
> > - moved setting tile filter and tile bsd auxiliary buffer addresses so
> > that they are always set, even if no tiles are used (thanks, Jernej)
> > - added a comment near the place where the 32-bit DMA mask is applied
> >   (thanks, Nicolas)
> > - improved consistency in register names (thanks, Nicolas)
> > 
> > Changes related to v5:
> > - improved the doc comments as per Ezequiel's review (thanks, Ezequiel)
> > - improved pdf output of documentation
> > - added Benjamin's Reviewed-by (thanks, Benjamin)
> > 
> > Changes related to v4:
> > - removed unused enum v4l2_vp9_intra_prediction_mode
> > - converted remaining enums to defines to follow the convention
> > - improved the documentation, in particular better documented how to use segmentation 
> > features
> > 
> > Changes related to v3:
> > 
> > Apply suggestions from Jernej's review (thanks, Jernej):
> > - renamed a control and two structs:
> > 	V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR_PROBS =>
> > 		V4L2_CTRL_TYPE_VP9_COMPRESSED_HDR
> > 	v4l2_ctrl_vp9_compressed_hdr_probs =>
> > 		v4l2_ctrl_vp9_compressed_hdr
> > 	v4l2_vp9_mv_compressed_hdr_probs => v4l2_vp9_mv_probs
> > - moved tx_mode to v4l2_ctrl_vp9_compressed_hdr
> > - fixed enum v4l2_vp9_ref_frame_sign_bias values (which are used to test a bitfield)
> > - explicitly assigned values to all other vp9 enums
> > 
> > Apply suggestion from Nicolas's review (thanks, Nicolas):
> > - explicitly stated that the v4l2_ctrl_vp9_compressed_hdr control is optional
> > and implemented only by drivers which need it
> > 
> > Changes related to the RFC v2:
> > 
> > - added another driver including a postprocessor to de-tile
> >         codec-specific tiling
> > - reworked uAPI structs layout to follow VP8 style
> > - changed validation of loop filter params
> > - changed validation of segmentation params
> > - changed validation of VP9 frame params
> > - removed level lookup array from loop filter struct
> >         (can be computed by drivers)
> > - renamed some enum values to match the spec more closely
> > - V4L2 VP9 library changed the 'eob' member of
> >         'struct v4l2_vp9_frame_symbol_counts' so that it is an array
> >         of pointers instead of an array of pointers to arrays
> >         (IPs such as g2 creatively pass parts of the 'eob' counts in
> >         the 'coeff' counts)
> > - factored out several repeated portions of code
> > - minor nitpicks and cleanups
> > 
> > Andrzej Pietrasiewicz (6):
> >   media: uapi: Add VP9 stateless decoder controls
> >   media: Add VP9 v4l2 library
> >   media: hantro: Rename registers
> >   media: hantro: Prepare for other G2 codecs
> >   media: hantro: Support VP9 on the G2 core
> >   media: hantro: Support NV12 on the G2 core
> > 
> > Boris Brezillon (1):
> >   media: rkvdec: Add the VP9 backend
> > 
> > Ezequiel Garcia (4):
> >   hantro: postproc: Fix motion vector space size
> >   hantro: postproc: Introduce struct hantro_postproc_ops
> >   hantro: Simplify postprocessor
> >   hantro: Add quirk for NV12/NV12_4L4 capture format
> > 
> >  .../userspace-api/media/v4l/biblio.rst        |   10 +
> >  .../media/v4l/ext-ctrls-codec-stateless.rst   |  573 +++++
> >  .../media/v4l/pixfmt-compressed.rst           |   15 +
> >  .../media/v4l/vidioc-g-ext-ctrls.rst          |    8 +
> >  .../media/v4l/vidioc-queryctrl.rst            |   12 +
> >  .../media/videodev2.h.rst.exceptions          |    2 +
> >  drivers/media/v4l2-core/Kconfig               |    4 +
> >  drivers/media/v4l2-core/Makefile              |    1 +
> >  drivers/media/v4l2-core/v4l2-ctrls-core.c     |  180 ++
> >  drivers/media/v4l2-core/v4l2-ctrls-defs.c     |    8 +
> >  drivers/media/v4l2-core/v4l2-ioctl.c          |    1 +
> >  drivers/media/v4l2-core/v4l2-vp9.c            | 1850 +++++++++++++++++
> >  drivers/staging/media/hantro/Kconfig          |    1 +
> >  drivers/staging/media/hantro/Makefile         |    7 +-
> >  drivers/staging/media/hantro/hantro.h         |   40 +-
> >  drivers/staging/media/hantro/hantro_drv.c     |   23 +-
> >  drivers/staging/media/hantro/hantro_g2.c      |   27 +
> >  .../staging/media/hantro/hantro_g2_hevc_dec.c |   69 +-
> >  drivers/staging/media/hantro/hantro_g2_regs.h |  132 +-
> >  .../staging/media/hantro/hantro_g2_vp9_dec.c  |  980 +++++++++
> >  drivers/staging/media/hantro/hantro_hw.h      |   83 +-
> >  .../staging/media/hantro/hantro_postproc.c    |   79 +-
> >  drivers/staging/media/hantro/hantro_v4l2.c    |   20 +
> >  drivers/staging/media/hantro/hantro_vp9.c     |  240 +++
> >  drivers/staging/media/hantro/hantro_vp9.h     |  103 +
> >  drivers/staging/media/hantro/imx8m_vpu_hw.c   |   38 +-
> >  .../staging/media/hantro/rockchip_vpu_hw.c    |    7 +-
> >  .../staging/media/hantro/sama5d4_vdec_hw.c    |    3 +-
> >  drivers/staging/media/rkvdec/Kconfig          |    1 +
> >  drivers/staging/media/rkvdec/Makefile         |    2 +-
> >  drivers/staging/media/rkvdec/rkvdec-vp9.c     | 1078 ++++++++++
> >  drivers/staging/media/rkvdec/rkvdec.c         |   52 +-
> >  drivers/staging/media/rkvdec/rkvdec.h         |   12 +-
> >  include/media/v4l2-ctrls.h                    |    4 +
> >  include/media/v4l2-vp9.h                      |  182 ++
> >  include/uapi/linux/v4l2-controls.h            |  284 +++
> >  include/uapi/linux/videodev2.h                |    6 +
> >  37 files changed, 6033 insertions(+), 104 deletions(-)
> >  create mode 100644 drivers/media/v4l2-core/v4l2-vp9.c
> >  create mode 100644 drivers/staging/media/hantro/hantro_g2.c
> >  create mode 100644 drivers/staging/media/hantro/hantro_g2_vp9_dec.c
> >  create mode 100644 drivers/staging/media/hantro/hantro_vp9.c
> >  create mode 100644 drivers/staging/media/hantro/hantro_vp9.h
> >  create mode 100644 drivers/staging/media/rkvdec/rkvdec-vp9.c
> >  create mode 100644 include/media/v4l2-vp9.h
> > 
> > 
> > base-commit: e4e737bb5c170df6135a127739a9e6148ee3da82
> > 
>