hosts/xps16: move ipu6 config to separate file, extend

hosts/xps16/configuration.nix

@@ -4,6 +4,7 @@
     ./hardware-configuration.nix
 
     ./apparmor.nix
+    ./ipu6.nix
 
     ./services/btrfs.nix
     ./services/docker.nix
@@ -98,9 +99,5 @@
       enable = true;
       enable32Bit = true;
     };
-    ipu6 = {
-      enable = true;
-      platform = "ipu6epmtl";
-    };
   };
 }

hosts/xps16/ipu6.nix

@@ -0,0 +1,34 @@
+{ config, pkgs, lib, ... }:
+let
+  cfg = config.hardware.ipu6;
+in
+{
+  hardware.ipu6 = {
+    enable = true;
+    platform = "ipu6epmtl";
+  };
+
+  hardware.firmware = lib.optionals cfg.enable (with pkgs; [
+    ipu6-camera-bins
+    ivsc-firmware
+  ]);
+
+  services.udev.extraRules = lib.mkIf cfg.enable ''
+    SUBSYSTEM=="intel-ipu6-psys", MODE="0660", GROUP="video"
+  '';
+
+  boot.extraModulePackages = lib.optionals cfg.enable (with config.boot.kernelPackages; [ ipu6-drivers ]);
+
+  environment.systemPackages = lib.optionals cfg.enable (with pkgs; [
+    libcamera
+  ]);
+
+  # https://jgrulich.cz/2024/08/19/making-pipewire-default-option-for-firefox-camera-handling/
+  services.pipewire.wireplumber.extraConfig."disable-v4l2" = lib.mkIf cfg.enable {
+    "wireplumber.profiles" = {
+      "main" = {"monitor.v4l2" = "disabled";};
+    };
+  };
+
+  # See also: https://github.com/NixOS/nixpkgs/issues/225743
+}