78 lines
2.9 KiB
Nix
78 lines
2.9 KiB
Nix
{ options, config, pkgs, lib, ... }:
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{
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config = let
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isMode = mode: (config.hardware.asahi.useExperimentalGPUDriver
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&& config.hardware.asahi.experimentalGPUInstallMode == mode);
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in lib.mkIf config.hardware.asahi.enable (lib.mkMerge [
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{
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# required for proper DRM setup even without GPU driver
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services.xserver.config = ''
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Section "OutputClass"
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Identifier "appledrm"
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MatchDriver "apple"
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Driver "modesetting"
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Option "PrimaryGPU" "true"
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EndSection
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'';
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}
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(lib.mkIf config.hardware.asahi.useExperimentalGPUDriver (
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# install the drivers
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if builtins.hasAttr "graphics" options.hardware then {
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hardware.graphics.package = config.hardware.asahi.pkgs.mesa-asahi-edge.drivers;
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} else { # for 24.05
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hardware.opengl.package = config.hardware.asahi.pkgs.mesa-asahi-edge.drivers;
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})
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)
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(lib.mkIf config.hardware.asahi.useExperimentalGPUDriver {
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# required for in-kernel GPU driver
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hardware.asahi.withRust = true;
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})
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(lib.mkIf (isMode "replace") {
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# replace the Mesa linked into system packages with the Asahi version
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# without rebuilding them to avoid rebuilding the world.
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system.replaceRuntimeDependencies = [
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{ original = pkgs.mesa;
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replacement = config.hardware.asahi.pkgs.mesa-asahi-edge;
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}
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];
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})
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(lib.mkIf (isMode "overlay") {
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# replace the Mesa used in Nixpkgs with the Asahi version using an overlay,
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# which requires rebuilding the world but ensures it is done faithfully
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# (and in a way compatible with pure evaluation)
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nixpkgs.overlays = [
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(final: prev: {
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# prevent cross-built Mesas that might be evaluated using this config (e.g. Steam emulation via box64) from using the special Asahi Mesa
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mesa = if prev.targetPlatform.isAarch64 then final.mesa-asahi-edge else prev.mesa;
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})
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];
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})
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]);
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options.hardware.asahi.useExperimentalGPUDriver = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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Use the experimental Asahi Mesa GPU driver.
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Do not report issues using this driver under NixOS to the Asahi project.
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'';
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};
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options.hardware.asahi.experimentalGPUInstallMode = lib.mkOption {
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type = lib.types.enum [ "driver" "replace" "overlay" ];
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default = "replace";
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description = ''
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Mode to use to install the experimental GPU driver into the system.
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driver: install only as a driver, do not replace system Mesa.
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Causes issues with certain programs like Plasma Wayland.
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replace (default): use replaceRuntimeDependencies to replace system Mesa with Asahi Mesa.
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Does not work in pure evaluation context (i.e. in flakes by default).
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overlay: overlay system Mesa with Asahi Mesa
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Requires rebuilding the world.
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'';
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};
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}
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