mirror of
https://github.com/libretro/Lakka-LibreELEC.git
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7bcc9f42e2
* Add support for 32.7.1 bsp * Add option to uenv.txt to use performance governor. * Add support for auto frequency changing based upon docking * Add README.md to L4T Project since it is its own beast * Fix flycast issues in L4T builds, by reverting back to upstream libretro master, which actually has support for nano platform
142 lines
4.1 KiB
Markdown
142 lines
4.1 KiB
Markdown
# L4T Developer Guide
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## What Works
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1. Tegra BSP Libs on tegra210 devices(Untested elsewhere)
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2. ffmpeg encoding/decoding using nvv4l2 encoder/decoder on tegra chips.
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## What Still needs to be done:
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1. Kernel get script needs proper cleanup and zip downloading/merge patching support for non switch version finished/tested.
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2. There is no bootloader support for standard tegra devices. I dont have any, so this is an undertaking I am unwilling to do at this time.
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3. Tegra-BSP might need some work on non t210 boards, I havnt bothered testing building for them. Probably the biggest differences will be the config file, or file name issues, the logic should be about the same.
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## Basic L4T Device Options:
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```
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GENERIC_L4T_VERSION= # Available Options: [ 32.3.1 32.4.2 32.4.3 32.4.4 32.5 32.5.1 32.6 32.6.1 32.7.1 ]
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L4T_DEVICE_TYPE="" # Available Options: [ t210 t18x t19x ]
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```
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Sha256 of generated file.
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This doesnt work properly, but when I refactor l4t_kernel_get stuff I plan on fixing it
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```
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L4T_COMBINED_KERNEL_SHA256=""
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```
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## Optional L4T Options:
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### Only set if you need to, these point at nvidia tegra git by default.
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### Only Use REPO or URL, never both at the same time
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### Currently URL Downloading is broken/not implemented. Still needs work.
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### This is default if not using custom kernel branches. I never bothered rebasing patches on generic kernels. [ 0 or 1]
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```
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FORCE_GENERIC_L4T_PATCHES=
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```
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### This is only used in conjunction with L4T_DEVICE_CUSTOM_* and is needed to place custom board dts properly in kernel tree.
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```
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L4T_DEVICE_CUSTOM_BOARD_NAME=""
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```
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### These should be self explanitory if not check projects/L4T/devices/Switch/options
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```
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L4T_KERNEL_4_9_REPO=""
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L4T_KERNEL_4_9_REPO_BRANCH=""
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L4T_KERNEL_4_9_REPO_SHA256=""
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L4T_KERNEL_4_9_URL=""
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L4T_KERNEL_NVIDIA_REPO=""
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L4T_KERNEL_NVIDIA_REPO_BRANCH=""
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L4T_KERNEL_NVIDIA_REPO_SHA256=""
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L4T_KERNEL_NVIDIA_URL=""
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L4T_KERNEL_NVGPU_REPO=""
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L4T_KERNEL_NVGPU_REPO_BRANCH=""
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L4T_KERNEL_NVGPU_REPO_SHA256=""
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L4T_KERNEL_NVGPU_URL=""
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L4T_DEVICE_TEGRA_REPO=""
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L4T_DEVICE_TEGRA_REPO_BRANCH=""
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L4T_DEVICE_TEGRA_REPO_SHA256=""
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L4T_DEVICE_TEGRA_URL=""
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L4T_DEVICE_COMMON_TEGRA_REPO=""
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L4T_DEVICE_COMMON_TEGRA_REPO_BRANCH=""
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L4T_DEVICE_COMMON_TEGRA_REPO_SHA256=""
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L4T_DEVICE_COMMON_TEGRA_URL=""
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```
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### These depend on L4T_DEVICE_TYPE, and wont be used if not building for t210
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```
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L4T_DEVICE_COMMON_T210_REPO=""
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L4T_DEVICE_COMMON_T210_REPO_BRANCH=""
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L4T_DEVICE_COMMON_T210_REPO_SHA256=""
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L4T_DEVICE_COMMON_T210_URL=""
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L4T_DEVICE_T210_REPO=""
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L4T_DEVICE_T210_REPO_BRANCH=""
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L4T_DEVICE_T210_REPO_SHA256=""
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L4T_DEVICE_T210_URL=""
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L4T_DEVICE_T210_JETSON_REPO=""
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L4T_DEVICE_T210_JETSON_REPO_BRANCH=""
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L4T_DEVICE_T210_JETSON_REPO_SHA256=""
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L4T_DEVICE_T210_JETSON_URL=""
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L4T_DEVICE_T210_BATUU_REPO=""
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L4T_DEVICE_T210_BATUU_REPO_BRANCH=""
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L4T_DEVICE_T210_BATUU_REPO_SHA256=""
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L4T_DEVICE_T210_BATUU_URL=""
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L4T_DEVICE_T210_PORG_REPO=""
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L4T_DEVICE_T210_PORG_REPO_BRANCH=""
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L4T_DEVICE_T210_PORG_REPO_SHA256=""
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L4T_DEVICE_T210_PORG_URL=""
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```
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### These depend on L4T_DEVICE_TYPE, and wont be used if not building for t18x
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```
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L4T_DEVICE_COMMON_T18X_REPO=""
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L4T_DEVICE_COMMON_T18X_REPO_BRANCH=""
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L4T_DEVICE_COMMON_T18X_REPO_SHA256=""
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L4T_DEVICE_COMMON_T18X_URL=""
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L4T_DEVICE_T18X_REPO=""
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L4T_DEVICE_T18X_REPO_BRANCH=""
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L4T_DEVICE_T18X_REPO_SHA256=""
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L4T_DEVICE_T18X_URL=""
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L4T_DEVICE_T18X_QUILL_REPO=""
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L4T_DEVICE_T18X_QUILL_REPO_BRANCH=""
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L4T_DEVICE_T18X_QUILL_REPO_SHA256=""
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L4T_DEVICE_T18X_QUILL_URL=""
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```
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### These depend on L4T_DEVICE_TYPE, and wont be used if not building for t19x
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```
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L4T_DEVICE_COMMON_T19X_REPO=""
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L4T_DEVICE_COMMON_T19X_REPO_BRANCH=""
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L4T_DEVICE_COMMON_T19X_REPO_SHA256=""
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L4T_DEVICE_COMMON_T19X_URL=""
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L4T_DEVICE_T19X_REPO=""
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L4T_DEVICE_T19X_REPO_BRANCH=""
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L4T_DEVICE_T19X_REPO_SHA256=""
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L4T_DEVICE_T19X_URL=""
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L4T_DEVICE_T19X_GALEN_REPO=""
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L4T_DEVICE_T19X_GALEN_REPO_BRANCH=""
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L4T_DEVICE_T19X_GALEN_REPO_SHA256=""
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L4T_DEVICE_T19X_GALEN_URL=""
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L4T_DEVICE_T19X_JAKKU_REPO=""
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L4T_DEVICE_T19X_JAKKU_REPO_BRANCH=""
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L4T_DEVICE_T19X_JAKKU_REPO_SHA256=""
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L4T_DEVICE_T19X_JAKKU_URL=""
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```
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### Apply Custom Device DTS tree.
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```
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L4T_DEVICE_CUSTOM_REPO=""
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L4T_DEVICE_CUSTOM_REPO_BRANCH=""
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L4T_DEVICE_CUSTOM_REPO_SHA256=""
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L4T_DEVICE_CUSTOM_REPO_URL=""
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```
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