From: Mikko Perttunen <mperttunen@xxxxxxxxxx> v3: * Updated patch 3 based on comments v2: * Updated patches 1,3 based on comments * Added Acked-by to patch 2 Original message: Hi all, this series adds support for the HW video decoder, NVDEC, on Tegra234 (Orin). The main change is a switch from Falcon to RISC-V for the internal microcontroller, which brings along a change in how the engine is booted. Otherwise it is backwards compatible with earlier versions. In previous iterations, firmware was simply loaded from disk and written into engine internal memory. Now, the engine has a bootrom that loads the firmware from a carveout where it has been loaded by the system bootloader; however, we still need to tell it where that carveout is loaded and some offsets into it. For that, the first patch adds a new memory controller API to query the carveout address. The offsets are read from device tree -- the expectation is that at flashing time (when the firmware is also flashed), the flasher also delivers a device tree overlay with values corresponding to the flashed firmware. The currently available Linux for Tegra release doesn't yet include this device tree overlay flashing, and the firmware version it contains is incompatible with this series. The plan is to fix that for the next Linux for Tegra release, but if necessary, we can postpone merging of this series to once those changes are available. Thanks! Mikko Mikko Perttunen (8): memory: tegra: Add API for retrieving carveout bounds dt-bindings: Add headers for NVDEC on Tegra234 dt-bindings: Add bindings for Tegra234 NVDEC arm64: tegra: Add NVDEC on Tegra234 gpu: host1x: Add stream ID register data for NVDEC on Tegra234 drm/tegra: nvdec: Support multiple clocks drm/tegra: Add code for booting RISC-V based engines drm/tegra: Add Tegra234 support to NVDEC driver .../gpu/host1x/nvidia,tegra234-nvdec.yaml | 156 ++++++++++++++++ arch/arm64/boot/dts/nvidia/tegra234.dtsi | 27 +++ drivers/gpu/drm/tegra/Makefile | 3 +- drivers/gpu/drm/tegra/drm.c | 1 + drivers/gpu/drm/tegra/nvdec.c | 171 +++++++++++++++--- drivers/gpu/drm/tegra/riscv.c | 106 +++++++++++ drivers/gpu/drm/tegra/riscv.h | 30 +++ drivers/gpu/host1x/dev.c | 12 ++ drivers/memory/tegra/mc.c | 25 +++ drivers/memory/tegra/tegra234.c | 5 + include/dt-bindings/clock/tegra234-clock.h | 4 + include/dt-bindings/memory/tegra234-mc.h | 3 + .../dt-bindings/power/tegra234-powergate.h | 1 + include/dt-bindings/reset/tegra234-reset.h | 1 + include/soc/tegra/mc.h | 11 ++ 15 files changed, 530 insertions(+), 26 deletions(-) create mode 100644 Documentation/devicetree/bindings/gpu/host1x/nvidia,tegra234-nvdec.yaml create mode 100644 drivers/gpu/drm/tegra/riscv.c create mode 100644 drivers/gpu/drm/tegra/riscv.h -- 2.37.0
