ship pine64-alsa-ucm, more likely to work with PinePhonePro

hosts/common/programs/alsa-ucm-conf/default.nix

@@ -4,44 +4,7 @@ let
 in
 {
   sane.programs.alsa-ucm-conf = {
-    configOption = with lib; mkOption {
-      default = {};
-      type = types.submodule {
-        options.preferEarpiece = mkOption {
-          type = types.bool;
-          default = true;
-        };
-      };
-    };
-
-    # upstream alsa ships with PinePhone audio configs, but they don't actually produce sound.
-    # - still true as of 2024-08-20
-    # - see: <https://github.com/alsa-project/alsa-ucm-conf/pull/134>
-    # - see: <https://gitlab.com/postmarketOS/pmaports/-/issues/2115>
-    #
-    # we can substitute working UCM conf in two ways:
-    # 1. nixpkgs' override for the `alsa-ucm-conf` package
-    #   - that forces a rebuild of ~500 packages (including webkitgtk).
-    # 2. set ALSA_CONFIG_UCM2 = /path/to/ucm2 in the relevant places
-    #   - e.g. pulsewire service.
-    #   - easy to miss places, though.
-    #
-    # alsa-ucm-pinephone-manjaro (2024-05-26):
-    # - headphones work
-    # - "internal earpiece" works
-    # - "internal speaker" is silent (maybe hardware issue)
-    # - 3.5mm connection is flapping when playing to my car, which eventually breaks audio and requires restarting wireplumber
-    # packageUnwrapped = pkgs.alsa-ucm-pinephone-manjaro.override {
-    #   inherit (cfg.config) preferEarpiece;
-    # };
-    # alsa-ucm-pinephone-pmos (2024-05-26):
-    # - headphones work
-    # - "internal earpiece" works
-    # - "internal speaker" is silent (maybe hardware issue)
-    packageUnwrapped = pkgs.alsa-ucm-pinephone-pmos.override {
-      inherit (cfg.config) preferEarpiece;
-    };
-
+    packageUnwrapped = pkgs.alsa-ucm-conf;
     sandbox.enable = false;  #< only provides $out/share/alsa
 
     # alsa-lib package only looks in its $out/share/alsa to find runtime config data, by default.
@@ -49,6 +12,8 @@ in
     # this is particularly needed by wireplumber;
     #   also *maybe* pipewire and pipewire-pulse.
     # taken from <repo:nixos/mobile-nixos:modules/quirks/audio.nix>
+    # the other option is to `override` pkgs.alsa-ucm-conf,
+    # but that triggers 500+ rebuilds
     env.ALSA_CONFIG_UCM2 = "/run/current-system/sw/share/alsa/ucm2";
 
     enableFor.system = lib.mkIf (builtins.any (en: en) (builtins.attrValues cfg.enableFor.user)) true;

hosts/common/programs/default.nix

@@ -132,6 +132,7 @@
     ./pactl.nix
     ./papers.nix
     ./pidof.nix
+    ./pine64-alsa-ucm.nix
     ./pipewire
     ./pkill.nix
     ./planify.nix

hosts/common/programs/pine64-alsa-ucm.nix

@@ -0,0 +1,26 @@
+# upstream alsa ships with PinePhone audio configs, but they don't actually produce sound.
+# - still true as of 2024-08-20
+# - see: <https://github.com/alsa-project/alsa-ucm-conf/pull/134>
+# - see: <https://gitlab.com/postmarketOS/pmaports/-/issues/2115>
+#
+# alsa-ucm-pinephone-manjaro (2024-05-26):
+# - headphones work
+# - "internal earpiece" works
+# - "internal speaker" is silent (maybe hardware issue)
+# - 3.5mm connection is flapping when playing to my car, which eventually breaks audio and requires restarting wireplumber
+# packageUnwrapped = pkgs.alsa-ucm-pinephone-manjaro.override {
+#   inherit (cfg.config) preferEarpiece;
+# };
+# alsa-ucm-pinephone-pmos (2024-05-26):
+# - headphones work
+# - "internal earpiece" works
+# - "internal speaker" is silent (maybe hardware issue)
+# packageUnwrapped = pkgs.alsa-ucm-pinephone-pmos.override {
+#   inherit (cfg.config) preferEarpiece;
+# };
+{ ... }:
+{
+  sane.programs.pine64-alsa-ucm = {
+    sandbox.enable = false;  #< only provides /share/alsa
+  };
+}

hosts/modules/hal/pine64-pinephone-pro/default.nix

@@ -32,6 +32,10 @@ in
     # boot.kernelPackages = pkgs.linuxPackagesFor myCustomKernel;
     # boot.initrd.extraFiles."/lib".source = "${config.system.modulesTree}/lib";
 
+    sane.programs.alsa-ucm-conf.suggestedPrograms = [
+      "pine64-alsa-ucm"  # upstreaming: https://github.com/alsa-project/alsa-ucm-conf/pull/375
+    ];
+
     boot.kernelPatches = [
       {
         # TODO: upstream into nixpkgs. <repo:nixos/nixpkgs:pkgs/os-specific/linux/kernel/common-config.nix>

hosts/modules/hal/pine64-pinephone/default.nix

@@ -110,6 +110,10 @@ in
       dd if=${pkgs.u-boot-pinephone}/u-boot-sunxi-with-spl.bin of=$out bs=1024 seek=8 conv=notrunc
     '';
 
+    sane.programs.alsa-ucm-conf.suggestedPrograms = [
+      "pine64-alsa-ucm"  # upstreaming: <https://github.com/alsa-project/alsa-ucm-conf/issues/399>
+    ];
+
     sane.programs.geoclue2.suggestedPrograms = [
       "gps-share"
     ];