Raspberry pi config from wiki

hosts/server/weebill.nix

@@ -2,6 +2,10 @@
 {
   boot = {
     kernelPackages = pkgs.linuxKernel.packages.linux_rpi4;
+    kernelParams = [
+      "snd_bcm2835.enable_hdmi=1"
+      "snd_bcm2835.enable_headphones=1"
+    ];
     initrd.availableKernelModules = [
       "xhci_pci"
       "usbhid"
@@ -10,6 +14,9 @@
     loader = {
       grub.enable = false;
       generic-extlinux-compatible.enable = true;
+      raspberryPi.firmwareConfig = ''
+        dtparam=audio=on
+      '';
     };
   };
 
@@ -21,6 +28,28 @@
     };
   };
 
+  # Config from <https://nixos.wiki/wiki/NixOS_on_ARM/Raspberry_Pi_4>
+  hardware = {
+    raspberry-pi."4" = {
+      apply-overlays-dtmerge.enable = true;
+      fkms-3d.enable = true;
+    };
+
+    deviceTree = {
+      enable = true;
+      filter = "*rpi-4-*.dtb";
+    };
+  };
+
+  console.enable = false;
+
+  environment.systemPackages = with pkgs; [
+    libraspberrypi
+    raspberrypi-eeprom
+  ];
+
+  networking.networkmanager.wifi.powersave = false; # Prevent host becoming unreachable on wifi after some time.
+
   # Open ports for DHCP server.
   networking.firewall.allowedUDPPorts = [
     53