Re: [PATCH 2/3] arm64: dts: qcom: glymur: Add Asus Zenbook A14 (UX3407NA)

[Nicko van Someren]

On Jun 22, 2026, at 19:31, Bjorn Andersson <andersson@xxxxxxxxxx> wrote:

> From: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxxxx>
> 
> UX3407NA is a variant of the Asus Zenbook A14 built on the Qualcomm
> Glymur platform. It comes with an 18-core X2 Elite SoC, 32GB DDR, and
> the other typical Glymur platform capabilities.

Firstly, many thanks for this. I recently acquired one of these machines
for some firmware work I'm doing and having a working Linux system on it
makes my life much easier!

I tested this patch set, along with the others it depends on. I have it
mostly working now but ran into some issues that might indicate a few
changes.

WIFI:

> + wifi@0 {
> + compatible = "pci17cb,1107";
> ...
> + };

ASUS don't specify what WiFi7 chip they use, which is fairly normal since
ASUS tends to swap the parts depending on supply. As a result, my machine
has a QCC2072 (17cb:1112) WiFi/BT module not the WCN7850 (17cb:1107) device
that you listed. Inspection of the hardware shows that the WiFi/BT module
is a solder-down M.2 LGA module, but electrically that's still an M.2
interface. Photos that I can find of the Zenbook A16 show it does the same.
I think it might be more reliable to define a wlan-connector, like Konrad
Dybcio did in the Asus Zenbook A16 (UX3607OA) (2/3) from 2026-07-21,
rather than specify the chip.


SOUND:

Regarding sound definitions, the dts declares four WSA8845s -- a woofer
and tweeter per side, two on swr0 and two on swr3. 

> +&swr0 {
> + status = "okay";
> +
> + /* WSA8845, left woofer */
> ...
> +
> + /* WSA8845, left tweeter */
> ...
> +};
> +
> +&swr3 {
> + status = "okay";
> ...
> + /* WSA8845, right woofer */
> ...
> +
> + /* WSA8845, right tweeter */
> ...
> +};

This machine only has two speakers (again confirmed by physical inspection).
Only swr0 shows attached on /sys/bus/soundwire/devices/sdw:*/status:

  sdw:1:0:0217:0204:00:0   Attached
  sdw:1:0:0217:0204:00:1   Attached
  sdw:4:0:0217:0204:00:0   UNATTACHED
  sdw:4:0:0217:0204:00:1   UNATTACHED

I don't think that's a config fault either; the swr0 and swr3 reset lines are
both claimed and in identical state of (out, 0, 2mA, no pull). It's not really
a surprise that the cheaper model from ASUS would not use the full spec audio
offered on the Qualcomm reference designs, but without a suitable
UX3407NA-tplg.bin topology file I can't really tell more.

It appears that the audio setup is blocked further up the audio stack anyway.
I hacked some dts changes, purloined blobs from Windows and got a stereo speaker
setup configured. SoundWire is healthy, but no audio is possible because the DSP
does not respond. The ADSP boots and the audio PD is reported up:

  remoteproc remoteproc1: remote processor adsp is now up
  PDR: Indication received from msm/adsp/audio_pd, state: 0x1fffffff
  qcom,apr ...: Adding APR/GPR dev: gprsvc:service:2:1

then, on every boot:

  qcom-apm gprsvc:service:2:1: CMD timeout for [1001021] opcode

I'm curious as to if you tested this (or if this even known to work on the
Zenbook A16, Yoga Slim 7x or EliteBook X G2q with the other submissions). Do
you know if/when the required firmware blobs will be forthcoming and
upstreamed?


HDMI:

The built-in HDMI cannot read EDID: the connector reports "connected" with
a monitor attached but the EDID is 0 bytes and there are no modes. Less than
2 seconds into every boot, before any cable is involved:

  gcc_usb3_tert_phy_com_aux_clk status stuck at 'off'
  Failed to enable clk 'com_aux': -16
  phy phy-88e1000.phy.5: phy init failed --> -16

I have not really investigated this in detail.


eDP:

eDP link training intermittently times out on resume, leaving visible flicker
until another suspend/resume retrains it:

  [drm:msm_dp_ctrl_link_train_1_2] *ERROR* link training #2 on phy 0 failed. ret=-110

I am carrying the (unmerged) "phy: qcom: edp: update v8 power-on
programming sequence" series, so this may be feedback for that rather than
a report against mainline.


Anyway, thank you again for this patch series. It got me to the point of
having a very usable machine for my limited needs. If you have updates the
need testing I'm happy to help.

Nicko