grimm-nixos-laptop/common/hardware/laptop.nix

{
  pkgs,
  config,
  lib,
  ...
}:
let
  cfg = config.grimmShared;
in
{
  config =
    with cfg;
    lib.mkIf (enable && laptop_hardware.enable) {
      environment.systemPackages =
        with pkgs;
        [
          lm_sensors
          lshw
          pciutils
          usbutils
          ddcutil
          python312Packages.py-cpuinfo
          (writeShellScriptBin "lsiommu" ./lsiommu)
        ]
        ++ lib.optionals graphical [
          opentabletdriver
          ddcui
          wootility
        ];

      hardware.i2c.enable = true;
      services.libinput.enable = true;
      hardware.opentabletdriver.enable = true;
      services.udisks2.enable = true;

      services.udev.extraRules = ''
        SUBSYSTEM=="i2c-dev", ACTION=="add",\
          ATTR{name}=="NVIDIA i2c adapter*",\
          TAG+="ddcci",\
          TAG+="systemd",\
          ENV{SYSTEMD_WANTS}+="ddcci@$kernel.service"
      '';

      systemd.services."ddcci@" = {
        scriptArgs = "%i";
        script = ''
          sleep 20
          echo Trying to attach ddcci to $1
          i=0
          id=$(echo $1 | cut -d "-" -f 2)
          if ${pkgs.ddcutil}/bin/ddcutil getvcp 10 -b $id; then
            echo ddcci 0x37 > /sys/bus/i2c/devices/$1/new_device
          fi
        '';
        serviceConfig.Type = "oneshot";
      };

      boot = {
        kernelParams = [ "quiet" ];
        loader.efi.canTouchEfiVariables = true;
        initrd.availableKernelModules = [
          "xhci_pci"
          "ahci"
          "nvme"
          "usbhid"
          "usb_storage"
          "sd_mod"
        ];
        loader.systemd-boot.enable = true;
        extraModulePackages = [
          (config.boot.kernelPackages.ddcci-driver.overrideAttrs (old: {
            patches = [
              (pkgs.fetchpatch {
                url = "https://gitlab.com/Sweenu/ddcci-driver-linux/-/commit/7f851f5fb8fbcd7b3a93aaedff90b27124e17a7e.patch";
                hash = "sha256-Y1ktYaJTd9DtT/mwDqtjt/YasW9cVm0wI43wsQhl7Bg=";
              })
            ];
          }))
        ];
        kernelModules = [
          "ddcci_backlight"
          "i2c-dev"
          "ec_sys"
        ];
      };
    };

  options.grimmShared.laptop_hardware = {
    enable = lib.mkEnableOption "grimm-laptop";
  };
}