Subject: Re: [PATCH v7 00/11] VP9 codec V4L2 control interface
To:     Andrzej Pietrasiewicz <andrzej.p@collabora.com>,
        linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org,
        linux-staging@lists.linux.dev
Cc:     Benjamin Gaignard <benjamin.gaignard@collabora.com>,
        Boris Brezillon <boris.brezillon@collabora.com>,
        Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>,
        Fabio Estevam <festevam@gmail.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Heiko Stuebner <heiko@sntech.de>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Nicolas Dufresne <nicolas.dufresne@collabora.com>,
        NXP Linux Team <linux-imx@nxp.com>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Shawn Guo <shawnguo@kernel.org>, kernel@collabora.com
References: <20210929160439.6601-1-andrzej.p@collabora.com>
From:   Hans Verkuil <hverkuil-cisco@xs4all.nl>
Message-ID: <9db47ebc-cb95-872d-feb4-d6432a74f2cb@xs4all.nl>
Date:   Mon, 15 Nov 2021 16:07:26 +0100
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Andrzej,

Can you rebase this series on top of the master branch of
https://git.linuxtv.org/media_stage.git/ ? Unfortunately this v7 no longer
applies. Specifically "rkvdec: Add the VP9 backend" failed in a non-trivial
manner.

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@xs4all.nl/
> 
> 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
>