hitagi: Switch to Intel Arc A770

Things are not very smooth yet. Hwmon only works with Kernel 6.2 and
only supports energy monitoring (and even that doesn’t look too good).
Fan control and temperature is not supported. To get at least usage
statistics, intel_gpu_top can be used. Mangohud in its newest unreleased
version also supports getting stats from it. However, intel_gpu_top
needs cap_perfmon, which is a pain to get working inside the double
bubblewrap sandbox for steam, therefore it is not yet available.

On the positive side, OpenCL works well and oneAPI also works with
blender-bin from nix-warez (nixpkgs doesn’t yet have blender with oneAPI
support).

machines/hitagi/hardware-configuration.nix

@@ -6,6 +6,23 @@
   ];
 
   boot = {
+    # Intel arc
+    #kernelPackages = pkgs.linuxPackages_latest;
+    kernelPackages = pkgs.unstable.recurseIntoAttrs (pkgs.unstable.linuxPackagesFor (pkgs.unstable.callPackage
+      ({ fetchurl, buildLinux, ... } @ args: buildLinux (args // rec {
+        version = "6.2.0-rc7";
+        modDirVersion = version;
+
+        src = fetchurl {
+          url = "https://git.kernel.org/torvalds/t/linux-6.2-rc7.tar.gz";
+          sha256 = "sha256-6klAGw+J0usyY55dTMb/reUbAobJdheG/6YvNGz7SwM=";
+        };
+
+        kernelPatches = [ ];
+
+        extraMeta.branch = "6.2";
+      } // (args.argsOverride or { })))
+      { }));
     # fan control configuration from https://gist.github.com/bakman2/e801f342aaa7cade62d7bd54fd3eabd8
     kernelModules = [ "kvm-amd" "it87" ];
     kernelParams = [ "acpi_enforce_resources=lax" ]; # allow it87 to load
@@ -75,16 +92,33 @@
   ];
 
   # GPU
-  hardware.opengl.extraPackages = with pkgs; [
-    rocm-opencl-icd
-  ];
+  hardware.opengl = {
+    package = pkgs.unstable.mesa.drivers;
+    package32 = pkgs.unstable.pkgsi686Linux.mesa.drivers;
+    extraPackages = with pkgs; [
+      intel-media-driver
+      libvdpau-va-gl
+      vaapiIntel
+      vaapiVdpau
+    ] ++ (with pkgs.unstable; [
+      intel-compute-runtime
+      intel-compute-runtime.drivers
+      level-zero
+    ]);
+  };
 
   environment.systemPackages = with pkgs; [
     clinfo
-    radeontop
-    rocm-smi
+    nvtop-amd # also returns basic stats for intel
   ];
 
+  security.wrappers."intel_gpu_top" = {
+    owner = "root";
+    group = "root";
+    capabilities = "cap_perfmon+p";
+    source = "${pkgs.unstable.intel-gpu-tools}/bin/intel_gpu_top";
+  };
+
   # https://www.reddit.com/r/gigabyte/comments/p5ewjn/b550i_pro_ax_f13_bios_sleep_issue_on_linux/
   systemd.services.suspend-fix = {
     wantedBy = [ "multi-user.target" ];
@@ -105,7 +139,7 @@
   };
 
   sbruder.fancontrol = {
-    enable = true;
+    enable = false; # no hwmon for intel arc (yet)
     enableDefaultMapping = true;
     fans = {
       front = {

pkgs/default.nix

@@ -30,6 +30,24 @@ in
     '';
   });
 
+  # FIXME: remove once manghud > 0.6.8 is in nixpkgs/intel arc works
+  mangohud = prev.mangohud.overrideAttrs (o: {
+    version = "unstable-2023-02-05";
+
+    src = prev.fetchFromGitHub {
+      owner = "flightlessmango";
+      repo = "MangoHud";
+      rev = "319077808668c589523853313d028cf81837ce72";
+      fetchSubmodules = true;
+      sha256 = "sha256-FHm5CcLKpD6R2XmGvlQrIU/OlkX1TGEN/ld3vrms2Lk=";
+    };
+
+    mesonFlags = o.mesonFlags ++ [
+      "-Dappend_libdir_mangohud=false" # new default incompatible with current packaging
+      "-Dtests=disabled" # tests require new subproject
+    ];
+  });
+
   vimPlugins = prev.vimPlugins // {
     # TODO: Remove once (if?) https://github.com/LnL7/vim-nix/pull/28 lands
     vim-nix = prev.vimPlugins.vim-nix.overrideAttrs (o: {

users/simon/modules/games.nix

@@ -91,8 +91,9 @@ let
   '';
 in
 lib.mkIf cfg.enable {
-  home.packages = with pkgs; [ ]
-    ++ lib.optionals (cfg.performanceIndex >= 2) [
+  home.packages = with pkgs; [
+    unstable.mangohud
+  ] ++ lib.optionals (cfg.performanceIndex >= 2) [
     mgba
   ] ++ lib.optionals (cfg.performanceIndex >= 4) [
     desmume
@@ -100,8 +101,7 @@ lib.mkIf cfg.enable {
   ] ++ lib.optionals (cfg.performanceIndex >= 8) [
     unstable.ryujinx
     unstable.yuzu-mainline
-  ]
-    ++ lib.optionals unfree.allowSoftware [
+  ] ++ lib.optionals unfree.allowSoftware [
     unstable.osu-lazer-sandbox
     steam-sandbox-with-icons
   ];