NVIDIA Tegra NVDEC support

From:		Mikko Perttunen <mperttunen-AT-nvidia.com>
To:		thierry.reding-AT-gmail.com, jonathanh-AT-nvidia.com, airlied-AT-linux.ie, daniel-AT-ffwll.ch, robh+dt-AT-kernel.org
Subject:		[PATCH 0/3] NVIDIA Tegra NVDEC support
Date:		Sat, 13 Feb 2021 12:15:09 +0200
Message-ID:		<20210213101512.3275069-1-mperttunen@nvidia.com>
Cc:		dri-devel-AT-lists.freedesktop.org, linux-tegra-AT-vger.kernel.org, devicetree-AT-vger.kernel.org, Mikko Perttunen <mperttunen-AT-nvidia.com>
Archive-link:		Article

Hi all,

with the release of documentation headers for Tegra multimedia engines
(NVDEC, NVENC, NVJPG) [1], I have started working on the corresponding
implementations. Here's the first one, NVDEC.

The kernel driver is a simple Falcon boot driver based on the VIC
driver. Some code sharing should be considered there in the future.
The userspace driver to accompany this is a bit more complicated -
I have expanded vaapi-tegra-driver[2] to support MPEG2 decoding.
It should be noted that the implementation is still very clunky
and has poor performance, but it's a start.

This series is based on top of the "Host1x/TegraDRM UAPI" series.
For testing, appropriate firmware should be obtained from a
Linux for Tegra distribution for now; the GPU should also be
enabled in the device tree.

Series was tested on Tegra186.

Thanks!

Mikko

[1] https://github.com/NVIDIA/open-gpu-doc/tree/master/classe...
[2] https://github.com/cyndis/vaapi-tegra-driver

Mikko Perttunen (3):
  dt-bindings: Add YAML bindings for Host1x and NVDEC
  arm64: tegra: Add NVDEC to Tegra186 device tree
  drm/tegra: Add NVDEC driver

 .../gpu/host1x/nvidia,tegra20-host1x.yaml     | 129 +++++
 .../gpu/host1x/nvidia,tegra210-nvdec.yaml     |  90 ++++
 MAINTAINERS                                   |   1 +
 arch/arm64/boot/dts/nvidia/tegra186.dtsi      |  15 +
 drivers/gpu/drm/tegra/Makefile                |   3 +-
 drivers/gpu/drm/tegra/drm.c                   |   4 +
 drivers/gpu/drm/tegra/drm.h                   |   1 +
 drivers/gpu/drm/tegra/nvdec.c                 | 497 ++++++++++++++++++
 drivers/gpu/host1x/dev.c                      |  12 +
 include/linux/host1x.h                        |   1 +
 10 files changed, 752 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/gpu/host1x/nvidia,tegra20-host1x.yaml
 create mode 100644 Documentation/devicetree/bindings/gpu/host1x/nvidia,tegra210-nvdec.yaml
 create mode 100644 drivers/gpu/drm/tegra/nvdec.c

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2.30.0