Acer Aspire AV16-71P (Arrow Lake, ARL): No SoundWire machine driver found (RT712-only link 0 config, internal speakers/mic/headset jack missing)

[pdaether]

Description

Internal speakers, headset jack and DMICs do not work on this laptop. Only HDMI outputs (from the Intel HDMI codec) are exposed by PipeWire/ALSA; Bluetooth audio works fine since it does not depend on the DSP.

The kernel reports No SoundWire machine driver found and falls back to skl_hda_dsp_generic with the HDMI-only topology, so the Realtek RT712 (jack/speaker/mic) on SoundWire link 0 is never instantiated.

This looks similar to #4923 (Swift Go 14, MTL), but on Arrow Lake, and with only the RT712 reported on link 0 — no separate amplifier codec is reported by ACPI.

I checked current upstream:

• commit 242200c ("ASoC: soc-acpi-intel-arl-match: add rt712_l0_rt1320_l3 support", in v7.1) adds an ARL entry for RT712-l0, but it requires an RT1320 on link 3 (arl_rt712_l0_rt1320_l3) plus the snd_soc_acpi_intel_sdca_is_device_rt712_vb() machine check. This machine reports no device on link 3.
• The referenced topology sof-arl-rt712-l0-rt1320-l3.tplg is not present in sof-bin (checked up to v2.14.3) either.

So this specific configuration (ARL + RT712 on link 0 only + PCH DMICs + iDISP HDMI) appears to be unsupported so far. Could a match entry + topology be added for it (analogous to what was done for MTL in #4923)? Happy to test any patch/topology.

Hardware

sys_vendor:      Acer
product_name:    Aspire AV16-71P
product_version: V1.01
board_name:      Sapphire_ARH
board_version:   V1.01

card long name:  ARL-AspireAV16_71P-V1.01-Sapphire_ARH
Audio PCI:       00:1f.3 Multimedia audio controller [0401]: Intel Corporation Device [8086:7728]
Codec present:   Intel HDMI (codec#2) only — no analog HDA codec

Software

Distribution: Ubuntu 26.04 (resolute)
Kernel:       7.0.0-30-generic (same behavior on 6.17.0-41-generic)
PipeWire/WirePlumber session manager, only HDMI sinks visible:
  pactl list cards short → one card, HDMI profiles only
  aplay -l               → devices 3,4,5 = HDMI1/2/3 only
SOF firmware: intel/sof-ipc4/arl/sof-arl.ri, version 2.14.1.1 — boots fine
Topology used after fallback: intel/sof-ipc4-tplg/sof-hda-generic-idisp-2ch.tplg

dmesg excerpt

sof-audio-pci-intel-mtl 0000:00:1f.3: No SoundWire machine driver found for the ACPI-reported configuration:
sof-audio-pci-intel-mtl 0000:00:1f.3: link 0 mfg_id 0x025d part_id 0x0712 version 0x3
sof-audio-pci-intel-mtl 0000:00:1f.3: hda codecs found, mask 4
sof-audio-pci-intel-mtl 0000:00:1f.3: using HDA machine driver skl_hda_dsp_generic now
sof-audio-pci-intel-mtl 0000:00:1f.3: NHLT device BT(0) detected, ssp_mask 0x4
sof-audio-pci-intel-mtl 0000:00:1f.3: BT link detected in NHLT tables: 0x4
sof-audio-pci-intel-mtl 0000:00:1f.3: DMICs detected in NHLT tables: 2
sof-audio-pci-intel-mtl 0000:00:1f.3: Firmware file:     intel/sof-ipc4/arl/sof-arl.ri
sof-audio-pci-intel-mtl 0000:00:1f.3: Topology file:     intel/sof-ipc4-tplg/sof-hda-generic-idisp-2ch.tplg
sof-audio-pci-intel-mtl 0000:00:1f.3: Loaded firmware library: ADSPFW, version: 2.14.1.1
sof-audio-pci-intel-mtl 0000:00:1f.3: Booted firmware version: 2.14.1.1

Notes:

• The SoundWire slave on link 0: mfg_id 0x025d (Realtek), part_id 0x0712 (RT712), version 0x3.
• I don't know whether this RT712 is the SDCA "VB" variant; nothing probes it today due to the fallback. Can test/check on request.
• Willing to provide acpidump, full dmesg, alsa-info snapshot, NHLT dump or test kernel/topology builds.