Add gpu-config.nix

gpu-config.nix

@@ -0,0 +1,30 @@
+{ config, pkgs, ... }:
+
+{
+  # make the kernel use the correct driver early
+  boot.initrd.kernelModules = [ "amdgpu" ];
+
+  hardware.graphics.enable = true;
+  services.xserver.videoDrivers = [ "amdgpu" ];
+
+  hardware.graphics.enable32Bit = true;
+
+  hardware.graphics.extraPackages = with pkgs; [
+    # Mesa drivers (includes OpenGL, Vulkan via RADV)
+    mesa
+    
+    # AMD's official Vulkan driver (optional alternative to RADV)
+    amdvlk
+    
+    # OpenCL support - IMPORTANT: Check which OpenCL implementation works for RX 580
+    # For R600-family and newer (RX 580 is GCN 4.0, so should use rusticl eventually)
+    mesa.opencl  # Legacy OpenCL driver (Clover) - being removed soon
+    # OR for future-proofing (when rusticl becomes default):
+    # pkgs.mesa.rusticl
+    
+    # Video acceleration
+    libva
+    libva-utils
+    vaapiVdpau
+  ];
+}