apply our clock settings

nixos/fuchsia/services/amdgpu-clocks.nix

@@ -0,0 +1,31 @@
+{ pkgs, ... }:
+
+{
+  # Our custom power state
+  environment.etc = {
+    "default/amdgpu-custom-states.card0" = {
+      text = ''
+        # For Navi (and Radeon7) we can only set highest SCLK & MCLK, "state 1":
+        OD_SCLK:
+        1: 1800MHz
+        OD_MCLK:
+        1: 875MHz
+        # More fine-grain control of clocks and voltages are done with VDDC curve:
+        OD_VDDC_CURVE:
+        0: 800MHz @ 699mV
+        1: 1450MHz @ 795mV
+        2: 1800MHz @ 950mV
+        # Force power limit (in micro watts):
+        FORCE_POWER_CAP: 200000000
+        FORCE_PERF_LEVEL: manual
+      '';
+
+      # The UNIX file mode bits
+      mode = "0440";
+    };
+  };
+
+  # Install our overclocking script.
+  environment.systemPackages = with pkgs; [ amdgpu-clocks ];
+}
+

nixos/fuchsia/services/default.nix

@@ -0,0 +1,7 @@
+{ ... }:
+
+{
+  imports = [
+    ./amdgpu-clocks.nix
+  ];
+}