refactor: make the whole thing more generic

modules/nixos/hardware/nvidia.nix

@@ -0,0 +1,51 @@
+{ pkgs, lib, config, ... }:
+with lib;
+
+let cfg = config.hardware.nvidia.preset.proprietary;
+
+in {
+  options.hardware.nvidia.preset.proprietary = {
+    enable = mkEnableOption
+      "Enable proprietary NVIDIA driver support with some sane defaults";
+  };
+
+  config = mkIf cfg.enable {
+    hardware.opengl = {
+      enable = true;
+      driSupport = true;
+      driSupport32Bit = true;
+      extraPackages = with pkgs; [ libvdpau-va-gl nvidia-vaapi-driver ];
+    };
+
+    services.xserver.videoDrivers = [ "nvidia" ];
+
+    boot.kernelParams = [ "nvidia_drm.fbdev=1" ];
+    boot.kernelModules =
+      [ "nvidia" "nvidia_modeset" "nvidia_uvm" "nvidia_drm" ];
+    boot.initrd.kernelModules =
+      [ "nvidia" "nvidia_modeset" "nvidia_uvm" "nvidia_drm" ];
+
+    hardware.nvidia = {
+      modesetting.enable = true;
+      # seems to cause crashes on sleep
+      powerManagement.enable = false;
+      open = true;
+      nvidiaSettings = false;
+      # no idea if this actually does anything...
+      nvidiaPersistenced = false;
+    };
+
+    environment = {
+      variables = {
+        VDPAU_DRIVER = "va_gl";
+        LIBVA_DRIVER_NAME = "nvidia";
+      };
+      systemPackages = with pkgs; [
+        glxinfo
+        nvtopPackages.nvidia
+        libva-utils
+        vulkan-tools
+      ];
+    };
+  };
+}