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Lakka-v5.x
Lakka-LibreELEC/projects/L4T/README.md
GavinDarkglider 7bcc9f42e2
Minor L4T/Switch changes before 4.x release. (#1631) 
* 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
2022-04-07 23:24:30 +02:00

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L4T Developer Guide

What Works

  1. Tegra BSP Libs on tegra210 devices(Untested elsewhere)
  2. ffmpeg encoding/decoding using nvv4l2 encoder/decoder on tegra chips.

What Still needs to be done:

  1. Kernel get script needs proper cleanup and zip downloading/merge patching support for non switch version finished/tested.
  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.
  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.

Basic L4T Device Options:

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 ] 
L4T_DEVICE_TYPE="" # Available Options: [ t210 t18x t19x ]

Sha256 of generated file.

This doesnt work properly, but when I refactor l4t_kernel_get stuff I plan on fixing it

L4T_COMBINED_KERNEL_SHA256=""

Optional L4T Options:

Only set if you need to, these point at nvidia tegra git by default.

Only Use REPO or URL, never both at the same time

Currently URL Downloading is broken/not implemented. Still needs work.

This is default if not using custom kernel branches. I never bothered rebasing patches on generic kernels. [ 0 or 1]

FORCE_GENERIC_L4T_PATCHES=

This is only used in conjunction with L4T_DEVICE_CUSTOM_* and is needed to place custom board dts properly in kernel tree.

L4T_DEVICE_CUSTOM_BOARD_NAME=""

These should be self explanitory if not check projects/L4T/devices/Switch/options

L4T_KERNEL_4_9_REPO=""
L4T_KERNEL_4_9_REPO_BRANCH=""
L4T_KERNEL_4_9_REPO_SHA256=""
L4T_KERNEL_4_9_URL=""

L4T_KERNEL_NVIDIA_REPO=""
L4T_KERNEL_NVIDIA_REPO_BRANCH=""
L4T_KERNEL_NVIDIA_REPO_SHA256=""
L4T_KERNEL_NVIDIA_URL=""

L4T_KERNEL_NVGPU_REPO=""
L4T_KERNEL_NVGPU_REPO_BRANCH=""
L4T_KERNEL_NVGPU_REPO_SHA256=""
L4T_KERNEL_NVGPU_URL=""

L4T_DEVICE_TEGRA_REPO=""
L4T_DEVICE_TEGRA_REPO_BRANCH=""
L4T_DEVICE_TEGRA_REPO_SHA256=""
L4T_DEVICE_TEGRA_URL=""

L4T_DEVICE_COMMON_TEGRA_REPO=""
L4T_DEVICE_COMMON_TEGRA_REPO_BRANCH=""
L4T_DEVICE_COMMON_TEGRA_REPO_SHA256=""
L4T_DEVICE_COMMON_TEGRA_URL=""

These depend on L4T_DEVICE_TYPE, and wont be used if not building for t210

L4T_DEVICE_COMMON_T210_REPO=""
L4T_DEVICE_COMMON_T210_REPO_BRANCH=""
L4T_DEVICE_COMMON_T210_REPO_SHA256=""
L4T_DEVICE_COMMON_T210_URL=""

L4T_DEVICE_T210_REPO=""
L4T_DEVICE_T210_REPO_BRANCH=""
L4T_DEVICE_T210_REPO_SHA256=""
L4T_DEVICE_T210_URL=""

L4T_DEVICE_T210_JETSON_REPO=""
L4T_DEVICE_T210_JETSON_REPO_BRANCH=""
L4T_DEVICE_T210_JETSON_REPO_SHA256=""
L4T_DEVICE_T210_JETSON_URL=""

L4T_DEVICE_T210_BATUU_REPO=""
L4T_DEVICE_T210_BATUU_REPO_BRANCH=""
L4T_DEVICE_T210_BATUU_REPO_SHA256=""
L4T_DEVICE_T210_BATUU_URL=""

L4T_DEVICE_T210_PORG_REPO=""
L4T_DEVICE_T210_PORG_REPO_BRANCH=""
L4T_DEVICE_T210_PORG_REPO_SHA256=""
L4T_DEVICE_T210_PORG_URL=""

These depend on L4T_DEVICE_TYPE, and wont be used if not building for t18x

L4T_DEVICE_COMMON_T18X_REPO=""
L4T_DEVICE_COMMON_T18X_REPO_BRANCH=""
L4T_DEVICE_COMMON_T18X_REPO_SHA256=""
L4T_DEVICE_COMMON_T18X_URL=""

L4T_DEVICE_T18X_REPO=""
L4T_DEVICE_T18X_REPO_BRANCH=""
L4T_DEVICE_T18X_REPO_SHA256=""
L4T_DEVICE_T18X_URL=""

L4T_DEVICE_T18X_QUILL_REPO=""
L4T_DEVICE_T18X_QUILL_REPO_BRANCH=""
L4T_DEVICE_T18X_QUILL_REPO_SHA256=""
L4T_DEVICE_T18X_QUILL_URL=""

These depend on L4T_DEVICE_TYPE, and wont be used if not building for t19x

L4T_DEVICE_COMMON_T19X_REPO=""
L4T_DEVICE_COMMON_T19X_REPO_BRANCH=""
L4T_DEVICE_COMMON_T19X_REPO_SHA256=""
L4T_DEVICE_COMMON_T19X_URL=""

L4T_DEVICE_T19X_REPO=""
L4T_DEVICE_T19X_REPO_BRANCH=""
L4T_DEVICE_T19X_REPO_SHA256=""
L4T_DEVICE_T19X_URL=""

L4T_DEVICE_T19X_GALEN_REPO=""
L4T_DEVICE_T19X_GALEN_REPO_BRANCH=""
L4T_DEVICE_T19X_GALEN_REPO_SHA256=""
L4T_DEVICE_T19X_GALEN_URL=""

L4T_DEVICE_T19X_JAKKU_REPO=""
L4T_DEVICE_T19X_JAKKU_REPO_BRANCH=""
L4T_DEVICE_T19X_JAKKU_REPO_SHA256=""
L4T_DEVICE_T19X_JAKKU_URL=""

Apply Custom Device DTS tree.

L4T_DEVICE_CUSTOM_REPO=""
L4T_DEVICE_CUSTOM_REPO_BRANCH=""
L4T_DEVICE_CUSTOM_REPO_SHA256=""
L4T_DEVICE_CUSTOM_REPO_URL=""