[PATCH 0/3] NVIDIA Tegra NVDEC support

[Neil Armstrong]

Hi,

On 13/02/2021 11:15, Mikko Perttunen wrote:
> 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.

Funny how all this tries to avoid all the DRM, remoteproc, V4L2-M2M stateless & co
all the other vendors tries to make usage of...

Neil

> 
> 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/classes/video
> [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
>