mirror of
https://github.com/nix-community/raspberry-pi-nix.git
synced 2025-11-08 19:46:03 +01:00
107 lines
4 KiB
Nix
107 lines
4 KiB
Nix
{ u-boot-src
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, rpi-linux-6_6-src
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, rpi-firmware-src
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, rpi-firmware-nonfree-src
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, rpi-bluez-firmware-src
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, ...
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}:
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final: prev:
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let
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# The version to stick at `pkgs.rpi-kernels.latest_bcm271x'
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latest = "v6_6_34";
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kernel-config = board: {
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inherit board;
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version = builtins.replaceStrings ["v" "_"] ["" "."] latest;
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kernel = rpi-linux-6_6-src;
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fw = rpi-firmware-src;
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wireless-fw = import ./raspberrypi-wireless-firmware.nix {
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bluez-firmware = rpi-bluez-firmware-src;
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firmware-nonfree = rpi-firmware-nonfree-src;
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};
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argsOverride = {
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structuredExtraConfig = with prev.lib.kernel; {
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# The perl script to generate kernel options sets unspecified
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# parameters to `m` if possible [1]. This results in the
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# unspecified config option KUNIT [2] getting set to `m` which
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# causes DRM_VC4_KUNIT_TEST [3] to get set to `y`.
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#
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# This vc4 unit test fails on boot due to a null pointer
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# exception with the existing config. I'm not sure why, but in
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# any case, the DRM_VC4_KUNIT_TEST config option itself states
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# that it is only useful for kernel developers working on the
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# vc4 driver. So, I feel no need to deviate from the standard
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# rpi kernel and attempt to successfully enable this test and
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# other unit tests because the nixos perl script has this
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# sloppy "default to m" behavior. So, I set KUNIT to `n`.
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#
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# [1] https://github.com/NixOS/nixpkgs/blob/85bcb95aa83be667e562e781e9d186c57a07d757/pkgs/os-specific/linux/kernel/generate-config.pl#L1-L10
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# [2] https://github.com/raspberrypi/linux/blob/1.20230405/lib/kunit/Kconfig#L5-L14
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# [3] https://github.com/raspberrypi/linux/blob/bb63dc31e48948bc2649357758c7a152210109c4/drivers/gpu/drm/vc4/Kconfig#L38-L52
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KUNIT = no;
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GPIO_PWM = no;
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};
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};
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};
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# Helpers for building the `pkgs.rpi-kernels' map.
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rpi-kernel = { kernel, version, fw, wireless-fw, argsOverride ? null, board }:
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let
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new-kernel = prev.linux_rpi4.override {
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argsOverride = {
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src = kernel;
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inherit version;
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modDirVersion = version;
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kernelPatches = [];
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defconfig = "${board}_defconfig";
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postFixup = "";
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} // (if builtins.isNull argsOverride then { } else argsOverride);
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};
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new-fw = prev.raspberrypifw.overrideAttrs (oldfw: { src = fw; });
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new-wireless-fw = final.callPackage wireless-fw { };
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in
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{
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"latest_${board}" = {
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kernel = new-kernel;
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firmware = new-fw;
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wireless-firmware = new-wireless-fw;
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};
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};
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rpi-kernels = builtins.foldl' (b: a: b // rpi-kernel a) { };
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in
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{
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# provide generic rpi arm64 u-boot
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uboot_rpi_arm64 = prev.buildUBoot rec {
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defconfig = "rpi_arm64_defconfig";
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extraMeta.platforms = [ "aarch64-linux" ];
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filesToInstall = [ "u-boot.bin" ];
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version = "2024.07-rc4";
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patches = [ ];
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makeFlags = [ ];
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src = u-boot-src;
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# In raspberry pi sbcs the firmware manipulates the device tree in
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# a variety of ways before handing it off to the linux kernel. [1]
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# Since we have installed u-boot in place of a linux kernel we may
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# pass the device tree passed by the firmware onto the kernel, or
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# we may provide the kernel with a device tree of our own. This
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# configuration uses the device tree provided by firmware so that
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# we don't have to be aware of all manipulation done by the
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# firmware and attempt to mimic it.
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#
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# 1. https://forums.raspberrypi.com/viewtopic.php?t=329799#p1974233
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};
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# default to latest firmware
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raspberrypiWirelessFirmware = final.rpi-kernels.latest_bcm2712.wireless-firmware;
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raspberrypifw = final.rpi-kernels.latest_bcm2712.firmware;
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} // {
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# rpi kernels and firmware are available at
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# `pkgs.rpi-kernels.<VERSION>_<BOARD>.{kernel,firmware,wireless-firmware}'.
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#
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# For example: `pkgs.rpi-kernels.latest_bcm2712.kernel'
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rpi-kernels = rpi-kernels [
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(kernel-config "bcm2711")
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(kernel-config "bcm2712")
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];
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}
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