** Description changed:

- I have no audio output (aside from Bluetooth) on my ASUS Zenbook S14 
- UX5406AA with Intel Core Ultra 9 386H (Panther Lake), running 
+ I have no audio output (aside from Bluetooth) on my ASUS Zenbook S14
+ UX5406AA with Intel Core Ultra 9 386H (Panther Lake), running
  Ubuntu 26.04 LTS Beta with kernel 7.0.0-10-generic.
  
  All the audio hardware appears to enumerate correctly over SoundWire:
  - cs42l43 codec on link 3 (probed, devid 0x042a43 rev a1)
  - 4x cs35l56 SmartAmp on links 1+2 (all probed, fw 3.4.4)
  - rt722 on link 3
  - SOF firmware boots successfully (v2.13.0.1)
  
- However, when the topology file loads 
+ However, when the topology file loads
  (sof-ptl-cs42l43-agg-l3-cs35l56-l2.tplg), it fails:
  
-   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: tplg 
sof-ptl-cs42l43-agg-l3-cs35l56-l2.tplg component load failed -22
-   sof_sdw sof_sdw: probe with driver sof_sdw failed with error -22
+   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: tplg 
sof-ptl-cs42l43-agg-l3-cs35l56-l2.tplg component load failed -22
+   sof_sdw sof_sdw: probe with driver sof_sdw failed with error -22
  
  cat /proc/asound/cards shows: --- no soundcards ---
  
- I'm not sure whether this is caused by the topology ABI mismatch 
- (3:29 vs 3:23) or by the sof_sdw machine driver missing DAI link 
- definitions for this Panther Lake codec configuration. I tried 
- downgrading SOF firmware to v2.13 and v2.12 releases but all 
- available PTL topology files have ABI 3:29:1, so I couldn't test 
+ I'm not sure whether this is caused by the topology ABI mismatch
+ (3:29 vs 3:23) or by the sof_sdw machine driver missing DAI link
+ definitions for this Panther Lake codec configuration. I tried
+ downgrading SOF firmware to v2.13 and v2.12 releases but all
+ available PTL topology files have ABI 3:29:1, so I couldn't test
  with a matching ABI.
  
  SoundWire devices visible:
-   sdw:0:1:01fa:3556:01:2  (cs35l56)
-   sdw:0:1:01fa:3556:01:3  (cs35l56)
-   sdw:0:2:01fa:3556:01:0  (cs35l56)
-   sdw:0:2:01fa:3556:01:1  (cs35l56)
-   sdw:0:3:01fa:4243:01    (cs42l43)
-   sdw:0:3:025d:0722:01    (rt722)
+   sdw:0:1:01fa:3556:01:2  (cs35l56)
+   sdw:0:1:01fa:3556:01:3  (cs35l56)
+   sdw:0:2:01fa:3556:01:0  (cs35l56)
+   sdw:0:2:01fa:3556:01:1  (cs35l56)
+   sdw:0:3:01fa:4243:01    (cs42l43)
+   sdw:0:3:025d:0722:01    (rt722)
  
  System info:
-   Laptop: ASUS Zenbook S14 UX5406AA
-   CPU: Intel Core Ultra 9 386H (Panther Lake)
-   OS: Ubuntu 26.04 LTS Beta
-   Kernel: 7.0.0-10-generic
-   firmware-sof-signed: 2025.12.2-1
-   BIOS: UX5406AA.300 12/18/2025
-   Hardware probe: https://linux-hardware.org/?probe=34cbba0446
+   Laptop: ASUS Zenbook S14 UX5406AA
+   CPU: Intel Core Ultra 9 386H (Panther Lake)
+   OS: Ubuntu 26.04 LTS Beta
+   Kernel: 7.0.0-10-generic
+   firmware-sof-signed: 2025.12.2-1
+   BIOS: UX5406AA.300 12/18/2025
+   Hardware probe: https://linux-hardware.org/?probe=34cbba0446
+ 
+ Also filed at sof: https://github.com/thesofproject/linux/issues/5721

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https://bugs.launchpad.net/bugs/2147342

Title:
  No audio on ASUS Zenbook S14 UX5406AA (Panther Lake) — sof_sdw fails
  to create DAI links for cs35l56

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