{ pkgs, config, lib, inputs, ... }:

with lib;
let
  cfg = config.modules.hardware.graphics.i915;
in {
  options.modules.hardware.graphics.i915 = {
    enable = mkEnableOption "Enable Intel i915 graphics drivers, used in conjuction with nixos-hardware";
    powersave = mkEnableOption {
      default = config.modules.core.laptop;
      description = "Enable intel i915-specific powersaving tweaks";
    };
  };

  config = mkIf cfg.enable {
    environment.systemPackages = with pkgs; [ intel-gpu-tools ];
    hardware.intel-gpu-tools.enable = true;

    boot.kernelParams = [
      # enable gpu virtualization
      "i915.enable_gvt=1"
    ] ++ optional cfg.powersave "i915.enable_fbc=1";
  };
}