[PTL] Add topology for ASUS Zenbook S14 UX5406AA — CS42L43 + 4× CS35L56 across two SoundWire links

[ajblack75-dotcom]

[PTL] Add topology for ASUS Zenbook S14 UX5406AA — CS42L43 + 4× CS35L56 across two SoundWire links

Hardware

Field	Value
Laptop	ASUS Zenbook S14 (2026)
Model	UX5406AA
BIOS	UX5406AA.303
Board	UX5406AA
PCI Subsystem ID	1043:1464 (ASUSTeK)
Audio device	Intel Panther Lake Smart Sound Technology BUS [8086:e328]
CPU	Intel Core Ultra 7 356H (Panther Lake)

Hardware audio topology (from kernel enumeration)

Device	SoundWire ID	Link	Position	Notes
CS35L56	sdw:0:1:01fa:3556:01:2	1	2	Smart amp
CS35L56	sdw:0:1:01fa:3556:01:3	1	3	Smart amp
CS35L56	sdw:0:2:01fa:3556:01:0	2	0	Smart amp
CS35L56	sdw:0:2:01fa:3556:01:1	2	1	Smart amp
CS42L43	sdw:0:3:01fa:4243:01	3	0	Headphone/headset codec

ACPI also reports a Realtek RT722 (0x000330025d072201) but it does not appear to be enumerated/attached in the running kernel — possibly disabled or wired through a different path. Mentioning for completeness.

So the actual configuration is:

• 4× CS35L56 amps split across SoundWire links 1 and 2 (2 amps per link)
• CS42L43 headphone codec on link 3

Problem

The kernel auto-selects topology sof-ptl-cs42l43-agg-l3-cs35l56-l2.tplg, which describes a configuration where all amps live on link 2. Since this laptop has amps on both links 1 and 2, the topology fails to load when it tries to bind the second SmartAmp DAI:

sof-audio-pci-intel-ptl 0000:00:1f.3: loading topology: intel/sof-ipc4-tplg/sof-ptl-cs42l43-agg-l3-cs35l56-l2.tplg
sof-audio-pci-intel-ptl 0000:00:1f.3: Topology: ABI 3:29:1 Kernel ABI 3:23:1
sof-audio-pci-intel-ptl 0000:00:1f.3: error: can't find BE for DAI alh-copier.Playback-SmartAmp.1
sof-audio-pci-intel-ptl 0000:00:1f.3: failed to add widget type 27 name : alh-copier.Playback-SmartAmp.1 stream Playback-SmartAmp
sof_sdw sof_sdw: ASoC: failed to load widget alh-copier.Playback-SmartAmp.1
sof_sdw sof_sdw: ASoC: topology: could not load header: -22
sof-audio-pci-intel-ptl 0000:00:1f.3: tplg intel/sof-ipc4-tplg/sof-ptl-cs42l43-agg-l3-cs35l56-l2.tplg component load failed -22
sof-audio-pci-intel-ptl 0000:00:1f.3: error: failed to load DSP topology -22
sof-audio-pci-intel-ptl 0000:00:1f.3: ASoC error (-22): at snd_soc_component_probe() on 0000:00:1f.3
sof_sdw sof_sdw: ASoC: failed to instantiate card -22
sof_sdw sof_sdw: error -EINVAL: snd_soc_register_card failed -22
sof_sdw sof_sdw: probe with driver sof_sdw failed with error -22

The sof_sdw card never registers, so all audio outputs that route through SOF are non-functional:

• Internal speakers (CS35L56)
• Headphone jack (CS42L43)
• HDMI/DisplayPort audio (routed through SOF DSP via iDisp on Panther Lake)

Only USB audio devices work.

Software environment

Component	Version
Kernel	7.0.3-arch1-2
sof-firmware	2025.12.2-1 (Arch package)
SOF firmware	2.14.1.1 (loads successfully)
Distribution	Arch Linux

SOF firmware itself loads without issue:

sof-audio-pci-intel-ptl 0000:00:1f.3: Loaded firmware library: ADSPFW, version: 2.14.1.1
sof-audio-pci-intel-ptl 0000:00:1f.3: Booted firmware version: 2.14.1.1

The failure is purely at the topology layer.

Available PTL topologies (none match this hardware)

sof-ptl-cs42l43-agg-l3-cs35l56-l2-4ch.tplg     ← amps on l2 only
sof-ptl-cs42l43-agg-l3-cs35l56-l2.tplg         ← amps on l2 only (auto-selected, fails)
sof-ptl-cs42l43-l2-cs35l56x6-l13.tplg          ← cs42l43 on l2, 6 amps on l1+l3

No existing topology describes cs42l43-l3 + cs35l56-l1 + cs35l56-l2.

Request

A topology file matching this configuration. The likely filename pattern based on existing naming conventions would be something like:

• sof-ptl-cs42l43-l3-cs35l56-l12.tplg (or -4ch variant)
• or with aggregation: sof-ptl-cs42l43-agg-l3-cs35l56-l12.tplg

Happy to test a candidate topology and provide further diagnostics as needed.

Attached

• alsa-info.txt — full alsa-info.sh output
• dmesg-audio.txt — relevant audio-related kernel log lines
• lspci-audio.txt — PCI audio device details
• dmi.txt — system DMI information

alsa-info.txt
dmesg-audio.txt
dmi.txt
lspci-audio.txt

[bardliao]

@ajblack75-dotcom Please test sof-ptl-cs42l43-agg-l3-cs35l56-l12.zip. I am not sure if CS42L43 is used or not. We need to figure it out before merging thesofproject/sof#10747
@charleskeepax FYI

[charleskeepax]

Hmm... yeah something is odd there according to our internal notes the cs42l43 speakers are not used on this model, so I don't think that should have the -agg- in the name. I wonder if the DisCo incorrectly has the cs42l43 smart amp in it or if its the ghost realtek device. I was sure we had an acpi dump on a ticket somewhere trying to find it.

[bardliao]

Hmm... yeah something is odd there according to our internal notes the cs42l43 speakers are not used on this model, so I don't think that should have the -agg- in the name. I wonder if the DisCo incorrectly has the cs42l43 smart amp in it or if its the ghost realtek device. I was sure we had an acpi dump on a ticket somewhere trying to find it.

I will modify #5754 if cs42l43 is not aggregated.

[charleskeepax]

Ok yeah found the DisCo, looks like the cs42l43 DisCo is consistent no SmartAmp. I think it's just the Realtek device causing that it seems to define a SmartAmp in the DisCo.

[ajblack75-dotcom]

@bardliao Thanks for the quick turnaround. Tested sof-ptl-cs42l43-agg-l3-cs35l56-l12.tplg on this hardware — same failure as the originally auto-selected topology. Note: the tplg_filename module parameter doesn't exist on snd_sof_pci_intel_ptl in kernel 7.0.3-arch1-2: snd_sof_pci_intel_ptl: unknown parameter 'tplg_filename' ignored To actually exercise the test topology, I renamed the candidate .tplg to match the auto-selected filename (sof-ptl-cs42l43-agg-l3-cs35l56-l2.tplg) and rebooted. dmesg confirms the file with the new content was loaded, and produced the same error: [ 8.415828] sof-audio-pci-intel-ptl 0000:00:1f.3: loading topology: intel/sof-ipc4-tplg/sof-ptl-cs42l43-agg-l3-cs35l56-l2.tplg [ 8.415981] sof-audio-pci-intel-ptl 0000:00:1f.3: Topology: ABI 3:29:1 Kernel ABI 3:23:1 [ 8.416261] sof-audio-pci-intel-ptl 0000:00:1f.3: error: can't find BE for DAI alh-copier.Playback-SmartAmp.1 [ 8.416265] sof-audio-pci-intel-ptl 0000:00:1f.3: failed to add widget type 27 name : alh-copier.Playback-SmartAmp.1 stream Playback-SmartAmp [ 8.416272] sof_sdw sof_sdw: ASoC: failed to load widget alh-copier.Playback-SmartAmp.1 [ 8.416274] sof_sdw sof_sdw: ASoC: topology: could not load header: -22 [ 8.416297] sof-audio-pci-intel-ptl 0000:00:1f.3: tplg intel/sof-ipc4-tplg/sof-ptl-cs42l43-agg-l3-cs35l56-l2.tplg component load failed -22 [ 8.416318] sof_sdw sof_sdw: ASoC: failed to instantiate card -22 /proc/asound/cards shows only the USB BRIO webcam, no SOF card registered. @charleskeepax this aligns with your finding that CS42L43 isn't actually aggregated as a speaker amp on this model — happy to test a non-aggregated variant when you have one ready. Let me know if there's anything else useful I can pull (acpidump, etc.) to help confirm the phantom Realtek SmartAmp issue.

…

On Thu, May 7, 2026 at 10:04 AM Charles Keepax ***@***.***> wrote: *charleskeepax* left a comment (thesofproject/linux#5771) <#5771 (comment)> Ok yeah found the DisCo, looks like the cs42l43 DisCo is consistent no SmartAmp. I think it's just the Realtek device causing that it seems to define a SmartAmp in the DisCo. — Reply to this email directly, view it on GitHub <#5771 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/CDJOB463WCALVYJBOLAGHGT4ZSJVPAVCNFSM6AAAAACYTB6T2WVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHM2DGOJXHAYDONBRGA> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you were mentioned.Message ID: ***@***.***>

[bardliao]

@ajblack75-dotcom Can you test with the latest #5754? And the driver should look for the function topologies. I.e. sof-sdca-jack-id0.tplg, sof-sdca-2amp-id2.tplg, etc.

[kv2019i]

Issue in Linux SOF driver side (not FW), moving to correct component.