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{ config, options, pkgs, lib, ... }:
{
imports = [
# disable pulseaudio as the Asahi sound infrastructure can't use it.
# if we disable it only if setupAsahiSound is enabled, then infinite
# recursion results as pulseaudio enables config.sound by default.
{ config.hardware.pulseaudio.enable = (!config.hardware.asahi.enable); }
];
options.hardware.asahi = {
setupAsahiSound = lib.mkOption {
type = lib.types.bool;
default = config.sound.enable && config.hardware.asahi.enable;
description = ''
Set up the Asahi DSP components so that the speakers and headphone jack
work properly and safely.
'';
};
};
config = let
cfg = config.hardware.asahi;
asahi-audio = pkgs.asahi-audio; # the asahi-audio we use
lsp-plugins = pkgs.lsp-plugins; # the lsp-plugins we use
lsp-plugins-is-patched = (lsp-plugins.overrideAttrs (old: {
passthru = (old.passthru or {}) // {
lsp-plugins-is-patched = builtins.elem "58c3f985f009c84347fa91236f164a9e47aafa93.patch"
(builtins.map (p: p.name) (old.patches or []));
};
})).lsp-plugins-is-patched;
lsp-plugins-is-safe = (pkgs.lib.versionAtLeast lsp-plugins.version "1.2.14") || lsp-plugins-is-patched;
# https://github.com/NixOS/nixpkgs/pull/282377
# options is the set of all module option declarations, rather than their
# values, to prevent infinite recursion
newHotness = builtins.hasAttr "configPackages" options.services.pipewire;
lv2Path = lib.makeSearchPath "lib/lv2" [ lsp-plugins pkgs.bankstown-lv2 ];
in lib.mkIf (cfg.setupAsahiSound && cfg.enable) (lib.mkMerge [
{
# enable pipewire to run real-time and avoid audible glitches
security.rtkit.enable = true;
# set up pipewire with the supported capabilities (instead of pulseaudio)
# and asahi-audio configs and plugins
services.pipewire = {
enable = true;
alsa.enable = true;
pulse.enable = true;
wireplumber.enable = true;
};
# set up enivronment so that UCM configs are used as well
environment.variables.ALSA_CONFIG_UCM2 = "${pkgs.alsa-ucm-conf-asahi}/share/alsa/ucm2";
systemd.user.services.pipewire.environment.ALSA_CONFIG_UCM2 = config.environment.variables.ALSA_CONFIG_UCM2;
systemd.user.services.wireplumber.environment.ALSA_CONFIG_UCM2 = config.environment.variables.ALSA_CONFIG_UCM2;
# enable speakersafetyd to protect speakers
systemd.packages = lib.mkAssert lsp-plugins-is-safe
"lsp-plugins is unpatched/outdated and speakers cannot be safely enabled"
[ pkgs.speakersafetyd ];
services.udev.packages = [ pkgs.speakersafetyd ];
}
(lib.optionalAttrs newHotness {
# use configPackages and friends to install asahi-audio and plugins
services.pipewire = {
configPackages = [ asahi-audio ];
extraLv2Packages = [ lsp-plugins pkgs.bankstown-lv2 ];
wireplumber = {
configPackages = [ asahi-audio ];
extraLv2Packages = [ lsp-plugins pkgs.bankstown-lv2 ];
};
};
})
(lib.optionalAttrs (!newHotness) {
# use environment.etc and environment variables to install asahi-audio and plugins
environment.etc = builtins.listToAttrs (builtins.map
(f: { name = f; value = { source = "${asahi-audio}/share/${f}"; }; })
asahi-audio.providedConfigFiles);
systemd.user.services.pipewire.environment.LV2_PATH = lv2Path;
systemd.user.services.wireplumber.environment.LV2_PATH = lv2Path;
})
]);
}
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