monolith: extract amdgpu config

hosts/monolith/amdgpu.nix

@@ -0,0 +1,37 @@
+{ pkgs, ... }:
+let
+  undervoltGpu = pkgs.writeShellScript "undervolt-gpu" ''
+    set -xe
+    cd $1
+    echo "manual" > power_dpm_force_performance_level
+    echo "1" > pp_power_profile_mode
+    test -e pp_od_clk_voltage
+    echo "vo -120" > pp_od_clk_voltage
+    echo "c" > pp_od_clk_voltage
+  '';
+in
+{
+  boot.initrd.kernelModules = [ "amdgpu" ];
+  boot.kernelParams = [
+    "amdgpu.dcdebugmask=0x10" # amdgpu undervolting bug
+    "video=DP-1:1920x1080@144"
+    "amdgpu.ppfeaturemask=0xfffd7fff" # enable undervolting
+  ];
+
+  hardware.opengl.driSupport = true;
+  # # For 32 bit applications
+  hardware.opengl.driSupport32Bit = true;
+
+  hardware.opengl.extraPackages = with pkgs; [
+    libva
+    libvdpau
+    vaapiVdpau
+    rocm-opencl-icd
+    rocm-opencl-runtime
+    rocmPackages.rocm-smi
+  ];
+
+  services.udev.extraRules = ''
+    ACTION=="add", SUBSYSTEM=="hwmon", ATTR{name}=="amdgpu", ATTR{power1_cap}="186000000", RUN+="${undervoltGpu} %S%p/device"
+  '';
+}

hosts/monolith/default.nix

@@ -23,7 +23,7 @@ in
   imports = [
     (modulesPath + "/installer/scan/not-detected.nix")
     ./partition.nix
-    ./undervolt.nix
+    ./amdgpu.nix
   ];
   boot.initrd.availableKernelModules = [
     "nvme"
@@ -52,28 +52,12 @@ in
     "amdgpu"
     "zenpower"
   ];
-  boot.kernelParams = [
-    "amdgpu.dcdebugmask=0x10" # amdgpu undervolting bug
-    "video=DP-1:1920x1080@144"
-  ];
+
   systemd.sleep.extraConfig = ''
     HibernateDelaySec=30s
     SuspendState=mem
   '';
 
-  hardware.opengl.driSupport = true;
-  # # For 32 bit applications
-  hardware.opengl.driSupport32Bit = true;
-
-  hardware.opengl.extraPackages = with pkgs; [
-    libva
-    libvdpau
-    vaapiVdpau
-    rocm-opencl-icd
-    rocm-opencl-runtime
-    rocmPackages.rocm-smi
-  ];
-
   fileSystems."/mnt/old" = {
     device = "/dev/disk/by-label/BTRFS_ROOT";
     fsType = "btrfs";

hosts/monolith/undervolt.nix

@@ -1,18 +0,0 @@
-{ pkgs, ... }:
-let
-  undervoltGpu = pkgs.writeShellScript "undervolt-gpu" ''
-    set -xe
-    cd $1
-    echo "manual" > power_dpm_force_performance_level
-    echo "1" > pp_power_profile_mode
-    test -e pp_od_clk_voltage
-    echo "vo -120" > pp_od_clk_voltage
-    echo "c" > pp_od_clk_voltage
-  '';
-in
-{
-  boot.kernelParams = [ "amdgpu.ppfeaturemask=0xfffd7fff" ];
-  services.udev.extraRules = ''
-    ACTION=="add", SUBSYSTEM=="hwmon", ATTR{name}=="amdgpu", ATTR{power1_cap}="186000000", RUN+="${undervoltGpu} %S%p/device"
-  '';
-}