linux-kernel - [PATCH v3 0/4] Add V4L stateless video decoder API support to NVIDIA Tegra driver

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Date:   Mon,  7 Feb 2022 17:19:33 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Nicolas Dufresne <nicolas@...fresne.ca>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
Cc:     linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/4] Add V4L stateless video decoder API support to NVIDIA Tegra driver

Support V4L stateless video decoder API by NVIDIA Tegra decoder driver.
Tested using GStreamer [1] and libvdpau-tegra [2][8].

[1] https://github.com/grate-driver/gstreamer/commit/b8509bdbb69b534e61419ea1798f32f9ad2f3597
[2] https://github.com/grate-driver/libvdpau-tegra/commit/f822e95911e5e0c39f8ba19f843ddc1e0138d5ce
[8] https://github.com/grate-driver/libvdpau-tegra/commit/80db4d02369f2a984ce3173d6bc305f32e9fdb97

Changelog:

v3: - Added new decode_params flags [7] instead of V4L2_BUF_FLAG_*FRAME flags,
      as was suggested by Nicolas Dufresne.

      [7] https://github.com/grate-driver/gstreamer/commit/c5cd847f9c26b7669720ae58f9058de2515f51a2

    - Added new patch that removes legacy UAPI.

v2: - Made V4L2_BUF_FLAG_*FRAME flags mandatory [3] and dropped reading
      of raw bitstream from the driver code, as was suggested by
      Nicolas Dufresne.

      [3] https://github.com/grate-driver/gstreamer/commit/aee292f0f2e84b7654a314dd7e63f916888ffaa5

    - Ran v4l2-compliance [4] and fluster [5][6] tests, like was suggested by
      Nicolas Dufresne. Fixed minor v4l2-compliance errors that were related
      to a partial initialization of the coded format and were harmless in
      practice, but made compliance checker unhappy.

      [4] https://gist.github.com/digetx/5d6bcdab633488f1dcc7c141ab90d30e
      [5] https://gist.github.com/digetx/b06c5d779e9d25afa41d9f46946fe399
      [6] https://gist.github.com/digetx/ac4198bc340e5065aa8ec3288bb21356

Dmitry Osipenko (4):
  media: v4l2-ctrls: Add new V4L2_H264_DECODE_PARAM_FLAG_P/BFRAME flags
  media: staging: tegra-vde: Factor out H.264 code
  media: staging: tegra-vde: Support V4L stateless video decoder API
  media: staging: tegra-vde: Remove legacy UAPI support

 .../media/v4l/ext-ctrls-codec-stateless.rst   |    6 +
 drivers/staging/media/tegra-vde/Kconfig       |    7 +
 drivers/staging/media/tegra-vde/Makefile      |    2 +-
 .../staging/media/tegra-vde/dmabuf-cache.c    |    2 +-
 drivers/staging/media/tegra-vde/h264.c        |  946 +++++++++++++++
 drivers/staging/media/tegra-vde/iommu.c       |    2 +-
 drivers/staging/media/tegra-vde/uapi.h        |   73 --
 drivers/staging/media/tegra-vde/v4l2.c        | 1018 +++++++++++++++++
 drivers/staging/media/tegra-vde/vde.c         |  945 ++-------------
 drivers/staging/media/tegra-vde/vde.h         |  121 +-
 include/uapi/linux/v4l2-controls.h            |    2 +
 11 files changed, 2170 insertions(+), 954 deletions(-)
 create mode 100644 drivers/staging/media/tegra-vde/h264.c
 delete mode 100644 drivers/staging/media/tegra-vde/uapi.h
 create mode 100644 drivers/staging/media/tegra-vde/v4l2.c

-- 
2.34.1