add amd anti lag

6 files changed, 69 insertions, 0 deletions

diff --git a/hosts/shinji/default.nix b/hosts/shinji/default.nix
index 0750d29..cbe6834 100644
--- a/hosts/shinji/default.nix
+++ b/hosts/shinji/default.nix
@@ -94,6 +94,7 @@
   };
 
   # modules
+  amdgpu.enable = true;
   battery.enable = true;
   bluetooth.enable = true;
   network.enable = true;
diff --git a/options.nix b/options.nix
index e3ab592..d1bb7cb 100644
--- a/options.nix
+++ b/options.nix
@@ -270,6 +270,7 @@ in {
     #
     # System modules
     #
+    amdgpu.enable = mkEnableOption "Enable amdgpu optimizations";
     battery.enable = mkEnableOption "Install battery and power system services and programs.";
     bluetooth.enable = mkEnableOption "Install bluetooth system services and programs.";
     fingerprint.enable = mkEnableOption "Install fingerprint system services and programs.";
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 3a31acf..032285b 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -6,6 +6,7 @@
   astal = final.callPackage ./astal {};
   libfprint-2-tod1-vfs0090 = final.callPackage ./libfprint-2-tod1-vfs0090 {inherit (prev) libfprint-2-tod1-vfs0090;};
   solaar-udev-rules = final.callPackage ./solaar-udev-rules {};
+  low-latency-layer = final.callPackage ./low-latency-layer {};
 
   # change default jdk
   openjdk = final.openjdk25;
diff --git a/pkgs/low-latency-layer/default.nix b/pkgs/low-latency-layer/default.nix
new file mode 100644
index 0000000..c2ee993
--- /dev/null
+++ b/pkgs/low-latency-layer/default.nix
@@ -0,0 +1,37 @@
+{
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+  glslang,
+  vulkan-headers,
+  vulkan-loader,
+  vulkan-utility-libraries,
+  shaderc,
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "low_latency_layer";
+  version = "0.2.0";
+
+  src = fetchFromGitHub {
+    owner = "Korthos-Software";
+    repo = "low_latency_layer";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-mnGAH0m19wOkWEowpcPRHXQSc6HGYW+CFYxjPF2onk4=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+    glslang
+  ];
+
+  buildInputs = [
+    vulkan-headers
+    vulkan-loader
+    vulkan-utility-libraries
+    shaderc
+  ];
+
+  cmakeFlags = [
+    "-DCMAKE_BUILD_TYPE=Release"
+  ];
+})
diff --git a/system/amdgpu.nix b/system/amdgpu.nix
new file mode 100644
index 0000000..de58a62
--- /dev/null
+++ b/system/amdgpu.nix
@@ -0,0 +1,28 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}: let
+  inherit (lib) mkIf;
+  cfg = config.amdgpu;
+in {
+  config = mkIf cfg.enable {
+    # kernel modules
+    boot = {
+      initrd.kernelModules = ["amdgpu"];
+      kernelModules = ["kvm-amd"];
+    };
+
+    # AMD Anti-Lag
+    environment.systemPackages = [ pkgs.low-latency-layer ];
+    environment.etc."vulkan/implicit_layer.d/low_latency_layer.json".source = "${pkgs.low-latency-layer}/share/vulkan/implicit_layer.d/low_latency_layer.json";
+
+    # Configuration
+    environment.variables = {
+      AMD_VULKAN_ICD = "RADV";
+      RADV_ANTILAG = "1";
+      LOW_LATENCY_LAYER = "1";
+    };
+  };
+}
diff --git a/system/default.nix b/system/default.nix
index 40ef029..39d41bc 100644
--- a/system/default.nix
+++ b/system/default.nix
@@ -16,6 +16,7 @@ in {
     ./desktops
     ./gaming
     ./virt
+    ./amdgpu.nix
     ./battery.nix
     ./bluetooth.nix
     ./desktop.nix