Pre-flight checklist

• I have searched existing issues and this is not a duplicate.
• I have read the Contributing Guidelines.
• I have verified the issue is reproducible with the latest available CachyOS kernel.
• I have tried to reproduce the issue on Arch Linux's linux kernel.

Upstream / vanilla kernel check

I have not tested with a vanilla/upstream kernel

Kernel variant

linux-cachyos (EEVDF, Clang)

System information (cachyos-bugreport.sh)

https://paste.cachyos.org/p/fa3b3ae.log

Manual system information (if cachyos-bugreport.sh is unavailable)

Bug description

Root cause analysis

The ACP 7.0 audio coprocessor is detected (acp_asoc_acp70.0) but
no ASoC machine driver quirk exists for the FA401EA board in the kernel.
The internal speakers use a TAS2783 SmartAmp amplifier over SoundWire,
which requires both a DMI quirk in the ACP70 machine driver and
TAS2783 firmware blobs.

A similar fix was merged for the ASUS ProArt PX13 (HN7306EA) in kernel 7.0
(commit: ASoC: amd: acp: PX13 ACP70 config and machine quirks),
but FA401EA has not yet received the equivalent quirk.

Related issues:

• https://bbs.archlinux.org/viewtopic.php?pid=2298802
• https://discussion.fedoraproject.org/t/need-a-driver-missing-kernel-module-for-the-amd-acp70-audio-controller/188539
• [BUG] ASUS ProArt PX13 HN7306EA - No sound (AMD ACP70 no playback device) #737 (PX13, same chip)

Steps to reproduce

1. Try listening to any audio file

Expected behavior

Internal speakers and microphone should work,
similar to the ASUS ProArt PX13 with the same ACP70/TAS2783 hardware.

Actual behavior

No internal audio device detected. Only HDMI audio available.

Logs / stack traces

Additional system information

No response