feat: Dell XPS 14 DA14260

[cooparo]

Description of changes

This PR introduces the NixOS hardware profile for the Dell XPS 14 DA14260, providing out-of-the-box support and specific hardware quirk workarounds for this model.

Note: This PR is dependent on #1891, because of the Panther Lake CPU profile.

Key Additions

• Base Profile: Adds the core configuration profile for the Dell XPS 14 DA14260.
• Firmware Management: Enables the fwupd service for native firmware updates.
• Camera works. Integrated webcam doesn't work out of the box.
• Speakers work. Speakers don't work out of the box.

Microphone requirement

The mic seems to work only with Linux 7.0+.

Webcam Enablement & Workarounds

A major focus of this PR is enabling the front-facing RGB camera, which requires a custom stack to function correctly on Linux:

• Kernel Fix: Packages the intel_cvs kernel module (for the Synaptics SVP7500 camera bridge) with an IRQF_ONESHOT fix. This allows the IPU7 stack to successfully enumerate the OV08F4 sensor.
• Power Management: Disables USB autosuspend on the SVP7500 bridge (06CB:0701) to prevent the device from wedging.
• V4L2 Bridging: Bridges libcamera to a v4l2loopback device using a hand-rolled v4l2-relayd service. A custom service is used over the stock module to ensure the loopback has enough buffers and a GStreamer queue, avoiding severe framerate drops.
• Orientation Correction: Flips and mirrors the image stream natively, as the image was upside-down.
• Current Status: Achieves ~23 fps at 1280x720. The camera is usable by standard V4L2 applications (e.g., browsers, Cheese, video conferencing apps).

Known Issue:

• The RGB camera is not stable, and doesn't achieve its max resolution, it should be able to reach 3840x2160 (official specs says: 8MP/4K HDR webcam); the saturation/color are very weird (but idk yet how to address this)
• The IR camera intended for Windows Hello remains disabled. I'm not going to address this.

Things done

• Tested the changes in your own NixOS Configuration
• Tested the changes end-to-end by using your fork of nixos-hardware and
  importing it via <nixos-hardware> or Flake input

Related issues/fixes

• Not working on Dell Pro Plus 14, PB14250 intel/ipu7-drivers#26
• https://github.com/jibsta210/svp7500-camera-fix-pack
• HOST_SET_MIPI_CONFIG needed for HM1092 IR sensor on Panther Lake (CVS blocks data lane) intel/vision-drivers#37
• https://gist.github.com/jibsta210/8316b6a0bc58910891512945c4e91a08
• ipu7: init nixpkgs#479283

[noisesfromspace]

I've been on the 14250 since last year and appalled by the Linux support. Will test run this fork because it should have similar enough quirks.

edit: the 50 is Arrow Lake though not Panther Lake. But looking at the https://github.com/takumiando/nixos-hardware/blob/3887211270897deef92d36c4660a3fe7f63ba29a/common/gpu/intel/panther-lake/default.nix it shouldn't be too much of an issue. Just FYI for someone reading this with the same laptop

[aoli-al]

Tested on DA14260. Both camera and mic are working.

[cooparo]

How is the camera for you? There are some issues: the camera sometimes is laggy, sometimes is not, and the colors are not correct. Have you experienced these?

[aoli-al]

Camera was laggy while using zoom. I don't use camera much so it was okay for me. There is another patch that does not require v4l2loopback: https://github.com/jibsta210/ipu7-camera-linux. Will this provide better performance?

[cooparo]

And what about colors?

[aoli-al]

color was fine for me

[aoli-al]

I got hardware ISP working with this PR: NixOS/nixpkgs#542085

To use hardware ISP you may apply the following patch:

diff --git a/dell/xps/14-da14260/default.nix b/dell/xps/14-da14260/default.nix
index 2fdb42d7f1..76d06a9655 100644
--- a/dell/xps/14-da14260/default.nix
+++ b/dell/xps/14-da14260/default.nix
@@ -16,6 +16,13 @@
     lib.mkDefault pkgs.linuxPackages_latest
   );
 
+  hardware.ipu7 = {
+    enable = true;
+    platform = "ipu75xa";
+  };
+
+  services.v4l2-relayd.instances.ipu7.enable = false;
+
   # Intel CVS driver for Synaptics SVP7500 camera bridge (06CB:0701).
   # Without this the IPU7 camera stack does not enumerate even though the
   # kernel-side intel_ipu7 driver detects the sensor (OVTI08F4 / OV08F4).
@@ -60,8 +67,8 @@
           gst-plugins-base
           gst-plugins-good
           gst-plugins-bad
+          icamerasrc-ipu75xa
         ])
-        ++ [ pkgs.libcamera ]
       );
       v4l2loopback-ctl = "${config.boot.kernelPackages.v4l2loopback.bin}/bin/v4l2loopback-ctl";
       deviceFile = "/run/ipu7-camera-relay/device";
@@ -80,7 +87,7 @@
       # so the input pipeline fails to build and only the black splash is shown.
       # v4l2-relayd applies the caps (copied from the output appsrc below) to its
       # internal appsink instead.
-      input = "libcamerasrc ! videoconvert ! videoscale ! videobalance saturation=1.8 ! videoflip method=vertical-flip";
+      input = "icamerasrc ! videoconvert ! videoscale ! videoflip method=vertical-flip";
 
       # A leaky queue (drops old frames) + sync=false keep latency low so the
       # viewer sees the latest frame instead of a backlog; the -b 4 buffers in
@@ -90,7 +97,7 @@
         + " ! queue leaky=downstream max-size-buffers=3 ! videoconvert ! v4l2sink name=v4l2sink device=$(cat ${deviceFile}) sync=false";
     in
     {
-      description = "Intel IPU7 camera to v4l2loopback relay (libcamera bridge)";
+      description = "Intel IPU7 camera to v4l2loopback relay (hardware ISP via camera HAL)";
       after = [ "modprobe@v4l2loopback.service" ];
       wantedBy = [ "multi-user.target" ];
       environment = {
diff --git a/xnwqqxqr.patch b/xnwqqxqr.patch
new file mode 100644
index 0000000000..e69de29bb2

[phucisstupid]

any update?