# RTX 3080 Ti with the open kernel module, as linux-cachyos-nvidia-open on
# CachyOS. Turned off in the test VM (see vm.nix).
{
  config,
  lib,
  pkgs,
  ...
}:
let
  cfg = config.dot.nvidia;
in
{
  options.dot.nvidia.enable = lib.mkEnableOption "the NVIDIA driver" // {
    default = true;
  };

  config = lib.mkMerge [
    {
      hardware.graphics = {
        enable = true;
        enable32Bit = true;
      };
    }

    (lib.mkIf cfg.enable {
      services.xserver.videoDrivers = [ "nvidia" ];

      hardware.nvidia = {
        open = true;
        # 615.x, the same branch CachyOS has.
        package = config.boot.kernelPackages.nvidiaPackages.latest;
        modesetting.enable = true;
        nvidiaSettings = true;
        # Not set up on CachyOS either (no nvidia-suspend services enabled).
        powerManagement.enable = false;
      };

      # libva-nvidia-driver: Firefox hardware video decoding (see the NVD_BACKEND
      # and LIBVA_DRIVER_NAME lines in hyprland.lua).
      hardware.graphics.extraPackages = [ pkgs.nvidia-vaapi-driver ];
    })
  ];
}