NixOS config on Dell XPS 13 Plus 9320

etc-nixos

# /etc/nixos/configuration.nix
{ config, pkgs, ... }:

{
  imports =
    [ 
      ./hardware-configuration.nix
    ];

  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  networking.hostName = "ls03064"; # Define your hostname.

  networking.networkmanager.enable = true;

  # Set your time zone.
  time.timeZone = "Europe/Berlin";


  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "de_DE.UTF-8";
    LC_IDENTIFICATION = "de_DE.UTF-8";
    LC_MEASUREMENT = "de_DE.UTF-8";
    LC_MONETARY = "de_DE.UTF-8";
    LC_NAME = "de_DE.UTF-8";
    LC_NUMERIC = "de_DE.UTF-8";
    LC_PAPER = "de_DE.UTF-8";
    LC_TELEPHONE = "de_DE.UTF-8";
    LC_TIME = "de_DE.UTF-8";
  };

  # Enable the X11 windowing system.
  services.xserver.enable = true;
  # https://nixos.org/manual/nixos/stable/index.html#sec-x11--graphics-cards-intel
  services.xserver.videoDrivers = [ "intel" ];
  services.xserver.deviceSection = ''
    Option "DRI" "2"
    Option "TearFree" "true"
  '';

  services.xserver.displayManager.gdm.enable = true;
  services.xserver.desktopManager.gnome.enable = true;

  # Configure keymap in X11
  services.xserver = {
    layout = "de";
    xkbVariant = "";
  };

  console.keyMap = "de";

  services.printing.enable = true;

  # Enable sound with pipewire.
  sound.enable = true;
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };


  # for sake of ipu6-camera-bins
  nixpkgs.config.allowUnfree = true;

  users.users.<USER> = {
    isNormalUser = true;
    description = "..";
    extraGroups = [ "networkmanager" "wheel" ];

    packages = with pkgs; [
      home-manager
      # leave browsers here for sake of camera support
      firefox
      google-chrome
    ];
  };

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    file
    glxinfo
    htop
    inxi
    lshw
    openvpn
    pciutils

    # https://discourse.nixos.org/t/v4l2loopback-cannot-find-module/26301/5
    # obs-studio
    v4l-utils

    vim
  ];

  programs.vim.defaultEditor = true;

  system.stateVersion = "23.11";
}

# /etc/nixos/hardware-configuration.nix
{ config, lib, pkgs, modulesPath, ... }:

let
  ivsc-firmware = with pkgs;
    stdenv.mkDerivation rec {
      pname = "ivsc-firmware";
      version = "main";

      src = pkgs.fetchFromGitHub {
        owner = "intel";
        repo = "ivsc-firmware";
        rev = "10c214fea5560060d387fbd2fb8a1af329cb6232";
        sha256 = "sha256-kEoA0yeGXuuB+jlMIhNm+SBljH+Ru7zt3PzGb+EPBPw=";

      };

      installPhase = ''
        mkdir -p $out/lib/firmware/vsc/soc_a1_prod

        cp firmware/ivsc_pkg_ovti01a0_0.bin $out/lib/firmware/vsc/soc_a1_prod/ivsc_pkg_ovti01a0_0_a1_prod.bin
        cp firmware/ivsc_skucfg_ovti01a0_0_1.bin $out/lib/firmware/vsc/soc_a1_prod/ivsc_skucfg_ovti01a0_0_1_a1_prod.bin
        cp firmware/ivsc_fw.bin $out/lib/firmware/vsc/soc_a1_prod/ivsc_fw_a1_prod.bin
      '';
    };
in
{
  imports =
    [ (modulesPath + "/installer/scan/not-detected.nix")
    ];

  boot.initrd.availableKernelModules = [ "xhci_pci" "thunderbolt" "nvme" "usb_storage" "usbhid" "sd_mod" "i915" ];
  boot.initrd.kernelModules = [];
  boot.kernelModules = [ "kvm-intel" ];
  boot.extraModulePackages = [];

  # https://discourse.nixos.org/t/i915-driver-has-bug-for-iris-xe-graphics/25006/10
  # resolved: i915 0000:00:02.0: [drm] Selective fetch area calculation failed in pipe A
  boot.kernelParams = [
    "i915.enable_psr=0"
  ];

  fileSystems."/" =
    { device = "/dev/disk/by-uuid/5cfd71ea-6978-427b-9b10-75249bcc63ff";
      fsType = "ext4";
    };

  boot.initrd.luks.devices."luks-5f6a700d-cfdb-492c-b52d-d875e818631c".device = "/dev/disk/by-uuid/5f6a700d-cfdb-492c-b52d-d875e818631c";

  fileSystems."/boot" =
    { device = "/dev/disk/by-uuid/F642-A1B7";
      fsType = "vfat";
    };

  swapDevices = [ ];

  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
  # (the default) this is the recommended approach. When using systemd-networkd it's
  # still possible to use this option, but it's recommended to use it in conjunction
  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
  networking.useDHCP = lib.mkDefault true;
  # networking.interfaces.enp0s13f0u1u4.useDHCP = lib.mkDefault true;
  # networking.interfaces.wlp0s20f3.useDHCP = lib.mkDefault true;

  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
  powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
  # Tracking Issue: Intel MIPI/IPU6 webcam-support
  # https://github.com/NixOS/nixpkgs/issues/225743#issuecomment-1849613797
  # Infrastructure Processing Unit
  hardware.ipu6 = {
    enable = true;
    platform = "ipu6ep";
  };


  hardware.enableRedistributableFirmware = true;

  hardware.firmware = [
    ivsc-firmware
  ];


  # environment.etc.camera.source = "${ipu6-camera-hal}/share/defaults/etc/camera";
}

@AdrienLemaire Hey what hardware do you use. I just finished my working camera setup (Dell xps 9315). I looked at the comments and your sensor, message output, looked very similiar to me. I have the same camera sensor so I bet my setup would work for you.

I uploaded my files here: https://github.com/CyberT3C/nixos-config
I commented the debug steps which gave me new information in: https://github.com/CyberT3C/nixos-config/blob/main/dell-xps-9315-cam.nix
Look at the end.

OVTI01A0 in general

• v4lloopback cannot communicate with this sensor, too old
• icamerascr which is included in alot ip6 packages is at the moment also not able to do
• libcamerasrc works
• If you want to use the device directly by /dev/videoXY make sure you have a discover logic bevor because the device will always end up with a different number in the end. Depends on boot timing.

nixos

1. The most important step is to patch the linux kernel if your are < 6.16. This will fix the missing GPIO Pin 0x02.
2. Don't use any nixos ipu6 specified camera packages. These will mess up everything. Libcamera works for OVTI01A0!
3. Pipewire works like a charm for me. But in the file is also a service for v4l2 fallback if you need it in any case but then pipewire won't work anymore.

Unfurtunately there is no documentation in the nixos wiki for pipewire and the camera but the correct plugin for libcamera is already included in the nixos package. All you need is to activate it.

Webbrowser support: Last but not least enable pipewire in your favorit browser and don't forget about XDG.

TLDR: Use the nixos unstable channel with Linux Kerne 6.15.4 and import my config.

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
      <nixos-hardware/dell/xps/13-9315>
      ./dell-xps-9315-mic.nix
      ./dell-xps-9315-cam.nix
    ];

  boot.kernelPackages = pkgs.linuxPackages_6_15;

Thank you for the update @CyberT3C, unfortunately you solution doesn't work for me. Like in the comment on the issue Tracking Issue: Intel MIPI/IPU6 webcam-support, I'm facing

[   30.325907] ivsc_ace intel_vsc-5db76cf6-0a68-4ed6-9b78-0361635e2447: switch camera to host failed: -110