Hello, This series adds support for the NVJPG hardware accelerator found in the Tegra210 SoC.
The kernel driver is essentially a copy of the NVDEC driver as both engines are Falcon-based. For the userspace part I have written a Mesa Gallium backend [1] that, while still very much experimental, works in decoding images with VA-API. I have been using ffmpeg to call VA-API with the following command: ffmpeg -v verbose -hwaccel vaapi -hwaccel_device /dev/dri/renderD129 -i <input.jpg> -pix_fmt bgra -f fbdev /dev/fb0 which decodes <input.jpg> and shows the result in the framebuffer. The firmware for the engine can be obtained from a Linux for Tegra distribution. Due to the way the Gallium implementation works for Tegra the GPU also needs to be enabled. Thanks! Diogo To: Thierry Reding <[email protected]> To: Mikko Perttunen <[email protected]> To: David Airlie <[email protected]> To: Simona Vetter <[email protected]> To: Jonathan Hunter <[email protected]> To: Philipp Zabel <[email protected]> To: Rob Herring <[email protected]> To: Krzysztof Kozlowski <[email protected]> To: Conor Dooley <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Signed-off-by: Diogo Ivo <[email protected]> [1]: https://gitlab.freedesktop.org/d.ivo/mesa/-/tree/diogo/vaapi_gl?ref_type=heads --- Changes in v2: - [01/03]: Remove reset handling, set clk rate to max - [02/03]: Explicitly mention Tegra210 in the commit subject - [03/03]: Explicitly mention Tegra210 in the commit subject - Link to v1: https://lore.kernel.org/r/[email protected] --- Diogo Ivo (3): drm/tegra: Add NVJPG driver arm64: tegra: Add Tegra210 NVJPG power-domain node arm64: tegra: Add NVJPG node for Tegra210 platforms arch/arm64/boot/dts/nvidia/tegra210.dtsi | 14 +- drivers/gpu/drm/tegra/Makefile | 1 + drivers/gpu/drm/tegra/drm.c | 2 + drivers/gpu/drm/tegra/drm.h | 1 + drivers/gpu/drm/tegra/nvjpg.c | 331 +++++++++++++++++++++++++++++++ 5 files changed, 348 insertions(+), 1 deletion(-) --- base-commit: 736ecbbf1e57fc3bc6575c76f6a46c84760233f8 change-id: 20250605-diogo-nvjpg-e0d4c57126c5 Best regards, -- Diogo Ivo <[email protected]>
