nixos-hardware/apple/t2/default.nix

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{ config, lib, pkgs, ... }:
let
audioFiles = pkgs.fetchFromGitHub {
owner = "kekrby";
repo = "t2-better-audio";
rev = "e46839a28963e2f7d364020518b9dac98236bcae";
hash = "sha256-x7K0qa++P1e1vuCGxnsFxL1d9+nwMtZUJ6Kd9e27TFs=";
};
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audioFilesUdevRules = pkgs.runCommand "audio-files-udev-rules" {} ''
mkdir -p $out/lib/udev/rules.d
cp ${audioFiles}/files/*.rules $out/lib/udev/rules.d
substituteInPlace $out/lib/udev/rules.d/*.rules --replace "/usr/bin/sed" "${pkgs.gnused}/bin/sed"
'';
overrideAudioFiles = package: pluginsPath:
package.overrideAttrs (new: old: {
preConfigurePhases = old.preConfigurePhases or [ ] ++ [ "postPatchPhase" ];
postPatchPhase = ''
cp -r ${audioFiles}/files/{profile-sets,paths} ${pluginsPath}/alsa/mixer/
'';
});
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pipewirePackage = overrideAudioFiles pkgs.pipewire "spa/plugins/";
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apple-set-os-loader-installer = pkgs.stdenv.mkDerivation {
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name = "apple-set-os-loader-installer-1.0";
src = pkgs.fetchFromGitHub {
owner = "Redecorating";
repo = "apple_set_os-loader";
rev = "r33.9856dc4";
sha256 = "hvwqfoF989PfDRrwU0BMi69nFjPeOmSaD6vR6jIRK2Y=";
};
buildInputs = [ pkgs.gnu-efi ];
buildPhase = ''
substituteInPlace Makefile --replace "/usr" '$(GNU_EFI)'
export GNU_EFI=${pkgs.gnu-efi}
make
'';
installPhase = ''
install -D bootx64_silent.efi $out/bootx64.efi
'';
};
t2Cfg = config.hardware.apple-t2;
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in
{
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options = {
hardware.apple-t2.enableAppleSetOsLoader = lib.mkOption {
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default = false;
type = lib.types.bool;
description = "Whether to enable the appleSetOsLoader activation script.";
};
};
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config = {
# For keyboard and touchbar
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boot.kernelPackages = pkgs.linuxPackagesFor (pkgs.callPackage ./pkgs/linux-t2.nix { });
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boot.initrd.kernelModules = [ "apple-bce" ];
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# For audio
boot.kernelParams = [ "pcie_ports=compat" "intel_iommu=on" "iommu=pt" ];
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services.udev.packages = [ audioFilesUdevRules ];
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hardware.pulseaudio.package = overrideAudioFiles pkgs.pulseaudio "src/modules/";
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services.pipewire.package = pipewirePackage;
services.pipewire.wireplumber.package = pkgs.wireplumber.override {
pipewire = pipewirePackage;
};
# Make sure post-resume.service exists
powerManagement.enable = true;
systemd.services.fix-keyboard-backlight-and-touchbar = {
path = [ pkgs.kmod ];
serviceConfig.ExecStart = ''${pkgs.systemd}/bin/systemd-inhibit --what=sleep --why="fixing keyboard backlight and touchbar must finish before sleep" --mode=delay ${./fix-keyboard-backlight-and-touchbar.sh}'';
serviceConfig.Type = "oneshot";
description = "reload touchbar driver and restart upower";
wantedBy = [ "display-manager.service" "post-resume.target" ];
after = [ "post-resume.target" ];
};
# Activation script to install apple-set-os-loader in order to unlock the iGPU
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system.activationScripts.appleSetOsLoader = lib.optionalString t2Cfg.enableAppleSetOsLoader ''
if [[ -e /boot/efi/efi/boot/bootx64_original.efi ]]; then
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true # It's already installed, no action required
elif [[ -e /boot/efi/efi/boot/bootx64.efi ]]; then
# Copy the new bootloader to a temporary location
cp ${apple-set-os-loader-installer}/bootx64.efi /boot/efi/efi/boot/bootx64_temp.efi
# Rename the original bootloader
mv /boot/efi/efi/boot/bootx64.efi /boot/efi/efi/boot/bootx64_original.efi
# Move the new bootloader to the final destination
mv /boot/efi/efi/boot/bootx64_temp.efi /boot/efi/efi/boot/bootx64.efi
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else
echo "Error: /boot/efi/efi/boot/bootx64.efi is missing" >&2
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fi
'';
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# Enable the iGPU by default if present
environment.etc."modprobe.d/apple-gmux.conf".text = lib.optionalString t2Cfg.enableAppleSetOsLoader ''
options apple-gmux force_igd=y
'';
};
}