update nixos ucm install

src/docs/installing/distros.md

@@ -2,13 +2,64 @@
 
 ## NixOS
 
-- Enable and configure keyd (Example is cros-standard. Adjust as you need!)  
+::: tip 
+Note that the configurations are applied to `configuration.nix` located in `/etc/nixos`.
+:::
+
+::: tip 
+Running the command `sudo nixos-rebuild switch` will rebuild your installation and apply the changes made.
+:::
+
+- For Chromebook-related configuration, we will create `chrome-device.nix`.
+```bash
+sudo touch /etc/nixos/chrome-device.nix
+```
+
+- Then at the top of `configuration.nix` we import `chrome-device.nix`. 
 ```nix
 # configuration.nix
+# Edit this configuration file to define what should be installed on
+# your system.  Help is available in the configuration.nix(5) man page
+# and in the NixOS manual (accessible by running ‘nixos-help’).
+
+{ config, pkgs, ... }:
+
+{
+  imports =
+    [
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+      ./chrome-device.nix
+    ];
+
+    # the rest of your configuration...
+}
+
+```
+
+- First, enable and configure keyd (Example is cros-standard. Adjust as you need!)  
+```nix
+# chrome-device.nix
+{ config, pkgs, lib, ... }:
+
 services.keyd = {
     enable = true;
     keyboards.internal = {
-      ids = [ "0001:0001" ];
+      ids = [
+        "k:0001:0001"
+        "k:18d1:5044"
+        "k:18d1:5052"
+        "k:0000:0000"
+        "k:18d1:5050"
+        "k:18d1:504c"
+        "k:18d1:503c"
+        "k:18d1:5030"
+        "k:18d1:503d"
+        "k:18d1:505b"
+        "k:18d1:5057"
+        "k:18d1:502b"
+        "k:18d1:5061"
+      ];
       settings = {
         main = {
           f1 = "back";
@@ -77,72 +128,269 @@ services.keyd = {
 ```
 
 - Audio setup (Does the same as the audio script)  
-**Change the `GENERATION` to your board generation!**  
-Possible options: `adl` | `jsl` | `tgl` | `cml` | `glk` | `apl` | `avs` | `bsw` | `byt` | `mendocino` | `cezanne` | `picasso` | `stoney`
 
-If your generation isn't listed above, you can skip this section
+- Build the package in `chrome-device.nix`
+
 ```nix
-# configuration.nix
-  nixpkgs.overlays = with pkgs; [ (final: prev:
-    {
-      alsa-ucm-conf = prev.alsa-ucm-conf.overrideAttrs (old: {
-      wttsrc = (fetchFromGitHub {
-        owner = "WeirdTreeThing";
-        repo = "chromebook-ucm-conf";
-        rev = "484f5c581ac45c4ee6cfaf62bdecedfa44353424";
-        hash = "sha256-Jal+VfxrPSAPg9ZR+e3QCy4jgSWT4sSShxICKTGJvAI=";
-      });
-      installPhase = ''
-        runHook preInstall
-
-        mkdir -p $out/share/alsa
-        cp -r ucm ucm2 $out/share/alsa
-
-        mkdir -p $out/share/alsa/ucm2/conf.d
-        cp -r $wttsrc/{hdmi,dmic}-common $wttsrc/GENERATION/* $out/share/alsa/ucm2/conf.d
-
-        runHook postInstall
-        '';
-      });
-    })
+# chrome-device.nix
+{ config, pkgs, lib, ... }:
+
+services.keyd {
+  # rest of keyd configuration...
+};
+
+let
+  cb-ucm-conf = with pkgs; alsa-ucm-conf.overrideAttrs {
+    wttsrc = fetchFromGitHub {
+      owner = "WeirdTreeThing";
+      repo = "alsa-ucm-conf-cros";
+      rev = "6b395ae73ac63407d8a9892fe1290f191eb0315b";
+      hash = "sha256-GHrK85DmiYF6FhEJlYJWy6aP9wtHFKkTohqt114TluI=";
+    };
+    unpackPhase = ''
+      runHook preUnpack
+      tar xf "$src"
+      runHook postUnpack
+    '';
+
+    installPhase = ''
+      runHook preInstall
+      mkdir -p $out/share/alsa
+      cp -r alsa-ucm*/ucm2 $out/share/alsa
+      runHook postInstall
+    '';
+  }; 
+in
+{
+  # add your audio setup modprobes here
+
+  environment = {
+    systemPackages = with pkgs; [
+      maliit-keyboard # optional
+      sof-firmware
+    ];
+    sessionVariables.ALSA_CONFIG_UCM2 = "${cb-ucm-conf}/share/alsa/ucm2";
+    # AUDIO
+  };
+
+  system = {
+    replaceRuntimeDependencies = [
+      ({
+        original = pkgs.alsa-ucm-conf;
+        replacement = cb-ucm-conf;
+      })
+    ];
+  };
+}
+
+```
+
+- This process varies between AVS and SOF configuration. Replace `# AUDIO` with the following: 
+
+- For SOF: 
+```nix
+# chrome-device.nix
+# for 23.11 and unstable
+etc = {
+  "wireplumber/main.lua.d/51-increase-headroom.lua".text = ''
+      rule = {
+        matches = {
+          {
+            { "node.name", "matches", "alsa_output.*" },
+          },
+        },
+        apply_properties = {
+          ["api.alsa.headroom"] = 4096,
+        },
+      }
+
+    table.insert(alsa_monitor.rules,rule)
+  '';
+};
+
+```
+
+- For AVS: 
+```nix
+# chrome-device.nix
+# for 23.11 and unstable
+etc = {
+  "wireplumber/main.lua.d/51-avs-dmic.lua".text = ''
+    rule = {
+      matches = {
+        {
+          { "node.nick", "equals", "Internal Microphone" },
+        },
+      },
+      apply_properties = {
+        ["audio.format"] = "S16LE",
+      },
+    }
+
+    table.insert(alsa_monitor.rules, rule)
+  '';
+};
+
+```
+
+- However, if you're on NixOS 24.05, remove this set of lines in `chrome-device.nix`
+```nix
+# chrome-device.nix
+
+    # additonal configuration...
+
+    # for 23.11 and unstable
+    etc = {
+      "wireplumber/main.lua.d/51-increase-headroom.lua".text = ''
+         rule = {
+           matches = {
+             {
+               { "node.name", "matches", "alsa_output.*" },
+             },
+           },
+           apply_properties = {
+             ["api.alsa.headroom"] = 4096,
+           },
+         }
+
+         table.insert(alsa_monitor.rules,rule)
+      '';
+    };
+
+    # additonal configuration...
+
+```
+
+- Or if you're using AVS:
+```nix
+# chrome-device.nix
+
+    # additonal configuration...
+
+    # for 23.11 and unstable
+    etc = {
+      "wireplumber/main.lua.d/51-avs-dmic.lua".text = ''
+        rule = {
+          matches = {
+            {
+              { "node.nick", "equals", "Internal Microphone" },
+            },
+          },
+          apply_properties = {
+            ["audio.format"] = "S16LE",
+          },
+        }
+
+        table.insert(alsa_monitor.rules, rule)
+      '';
+    };
+
+    # additonal configuration...
+
+```
+
+- And from here replace it with this at the bottom of the `let...in` expression
+```nix
+# chrome-device.nix
+in 
+{
+  # additonal configuration...
+
+  # for 24.05
+  services.pipewire.wireplumber.configPackages = [
+    (pkgs.writeTextDir "share/wireplumber/main.lua.d/51-increase-headroom.lua" ''
+      rule = {
+        matches = {
+          {
+            { "node.name", "matches", "alsa_output.*" },
+          },
+        },
+        apply_properties = {
+          ["api.alsa.headroom"] = 4096,
+        },
+      }
+
+      table.insert(alsa_monitor.rules,rule)
+    '')
   ];
+
+  # additonal configuration...
+}
 ```
 
-- Install and export the ucm config as a session variable
+- Or if you're using AVS:
 ```nix
-# configuration.nix
-environment = {
-  systemPackages = with pkgs; [\
-    alsa-ucm-conf
+# chrome-device.nix
+in 
+{
+  # additonal configuration...
+
+  # for 24.05
+  services.pipewire.wireplumber.configPackages = [
+    (pkgs.writeTextDir "share/wireplumber/main.lua.d/51-avs-dmic.lua" ''
+      rule = {
+        matches = {
+          {
+            { "node.nick", "equals", "Internal Microphone" },
+          },
+        },
+        apply_properties = {
+          ["audio.format"] = "S16LE",
+        },
+      }
+
+      table.insert(alsa_monitor.rules, rule)
+    '')
   ];
-  sessionVariables = {
-    ALSA_CONFIG_UCM2 = "${pkgs.alsa-ucm-conf}/share/alsa/ucm2";
-  };
-};
+
+  # additonal configuration...
+}
 ```
 
-- Audio setup modprobes 
+- Audio setup modprobes
   - SOF modprobe config for Alderlake, Jasperlake, Tigerlake, Cometlake, and Geminilake
 ```nix
-# configuration.nix
-boot.extraModprobeConfig = ''
-  options snd-intel-dspcfg dsp_driver=3
-'';
+# chrome-device.nix
+in
+{
+  boot = {
+    extraModprobeConfig = ''
+      options snd-intel-dspcfg dsp_driver=3
+    '';
+  };
+
+  # additonal configuration...
+}
+
 ```
 
   - SOF modprobe config for Braswell and Baytrail
 ```nix
-# configuration.nix
-boot.extraModprobeConfig = ''
-  options snd-intel-dspcfg dsp_driver=3
-  options snd-sof sof_debug=1
-'';
+# chrome-device.nix
+in
+{
+  boot = {
+    extraModprobeConfig = ''
+      options snd-intel-dspcfg dsp_driver=3
+      options snd-sof sof_debug=1
+    '';
+  };
+
+  # additonal configuration...
+}
 ```
 
   - AVS modprobe config for Skylake, Kabylake, and Apollolake
 ```nix
-# configuration.nix
-boot.extraModprobeConfig = ''
-  options snd-intel-dspcfg dsp_driver=4
-'';
+# chrome-device.nix
+in
+{
+  boot = {
+    extraModprobeConfig = ''
+      options snd-intel-dspcfg dsp_driver=4
+    '';
+  };
+
+  # additonal configuration...
+}
 ```