use amd's drm-next branch

modules/hardware/amd-gpu.nix

@@ -6,31 +6,25 @@ in {
   };
 
   config = lib.mkIf cfg.enable {
-    boot.kernelParams = [ "amdgpu.ppfeaturemask=0xffffffff"  "split_lock_detect=off" ];
+    boot.kernelParams =
+      [ "amdgpu.ppfeaturemask=0xfff7ffff" "split_lock_detect=off" ];
+
     hardware.graphics = {
       enable = true;
       enable32Bit = true;
       package = lib.mkForce pkgs.mesa-git.mesa.drivers;
-      #extraPackages = with pkgs; [ mesa-git.amdvlk ];
+      extraPackages = with pkgs; [ mesa-git.amdvlk ];
     };
 
-    boot.initrd.kernelModules = [ "amdgpu" ];
+    hardware.amdgpu.initrd.enable = lib.mkDefault true;
     services.xserver.videoDrivers = [ "amdgpu" ];
     # controller (overclock, undervolt, fan curves)
-    environment.systemPackages = with pkgs; [ lact nvtopPackages.amd ];
+    environment.systemPackages = with pkgs; [
+      lact
+      nvtopPackages.amd
+      amdgpu_top
+    ];
     systemd.packages = with pkgs; [ lact ];
     systemd.services.lactd.wantedBy = [ "multi-user.target" ];
-
-    hardware.firmware = with pkgs;
-      [
-        (linux-firmware.overrideAttrs (old: {
-          src = builtins.fetchGit {
-            url =
-              "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git";
-            rev =
-              "b4cb02b2dc3330c6e5d69e84a616b1ca5faecf12"; # Uncomment this line to allow for pure builds
-          };
-        }))
-      ];
   };
 }