No Sound on Intel Panther Lake (LG Gram) - Missing SoundWire Machine Driver for RT1320/RT713

[superlaser97]

I am experiencing no audio output from the internal speakers or the 3.5mm headphone jack on a new Intel Panther Lake laptop (LG Gram). The kernel detects the SoundWire amplifiers (Realtek 1320 and 0713) but fails to find a machine driver for the ACPI-reported configuration. It falls back to a generic driver, which only maps the DMIC and HDMI outputs, leaving the primary PCM audio unavailable. This shows up as "Dummy Output" in the output selector

Hardware:
System Model: LG Gram 17Z90U (17Z90U-G.AU85A3)
CPU: Intel Core Ultra (Panther Lake)
Audio Controller: Intel Panther Lake HDMI (sof-audio-pci-intel-ptl)
Amplifiers/Codecs (from dmesg): Realtek part_id 0x1320 and part_id 0x0713

Software / OS:
OS: Arch Linux
Kernel: linux-mainline
SOF Firmware Version: 2.14.1.1

Relevant Kernel Logs

[    8.340849] sof-audio-pci-intel-ptl 0000:00:1f.3: No SoundWire machine driver found for the ACPI-reported configuration:
[    8.340853] sof-audio-pci-intel-ptl 0000:00:1f.3: link 1 mfg_id 0x025d part_id 0x1320 version 0x3
[    8.340855] sof-audio-pci-intel-ptl 0000:00:1f.3: link 3 mfg_id 0x025d part_id 0x0713 version 0x3
[    8.340859] sof-audio-pci-intel-ptl 0000:00:1f.3: Use SoundWire default machine driver with function topologies
[    8.340860] sof-audio-pci-intel-ptl 0000:00:1f.3: hda codecs found, mask 4
[    8.340863] sof-audio-pci-intel-ptl 0000:00:1f.3: NHLT device BT(0) detected, ssp_mask 0x4
[    8.340864] sof-audio-pci-intel-ptl 0000:00:1f.3: BT link detected in NHLT tables: 0x4
[    8.340865] sof-audio-pci-intel-ptl 0000:00:1f.3: DMICs detected in NHLT tables: 2
[    8.342996] sof-audio-pci-intel-ptl 0000:00:1f.3: Firmware paths/files for ipc type 1:
[    8.342999] sof-audio-pci-intel-ptl 0000:00:1f.3:  Firmware file:     intel/sof-ipc4/ptl/sof-ptl.ri
[    8.343000] sof-audio-pci-intel-ptl 0000:00:1f.3:  Firmware lib path: intel/sof-ipc4-lib/ptl
[    8.343001] sof-audio-pci-intel-ptl 0000:00:1f.3:  Topology file:     function topologies
[    8.668046] sof_sdw sof_sdw: hda_dsp_hdmi_build_controls: no PCM in topology for HDMI converter 3`
^^^
Please see attached [alsa-info.txt](https://github.com/user-attachments/files/27091121/alsa-info.txt)

[kv2019i]

Ok this is interesting, @bardliao @ujfalusi any ideas why the playback PCMs are not found. The PCH dmic and HDMI PCMs are found, so DSP is fully functional:

Components : 'HDA:80862822,80860101,00100000 cfg-amp:1 mic:dmic cfg-mics:2 iec61937-pcm:7,6,5 spk:rt1320 hs:rt713-sdca'

[bardliao]

@superlaser97 Can you rename sof-dyndbg.conf.txt to sof-dyndbg.conf and put it in the /etc/modprobe.d/ folder and share the full dmesg log? We don't know what happened with the limited log. Use SoundWire default machine driver with function topologies is expected for Panter Lake.

[superlaser97]

Hi @bardliao , i reinstalled arch before collecting the log, please see attached

full_dmesg_log.txt

[bardliao]

@superlaser97 The dmesg doesn't include the log that right after boot. But it seems the sound card is created. Can you also share the alsa-info output? @oder-chiou Could you take a look?

[superlaser97]

Hey @bardliao , please see attached

full_dmesg_log.txt

alsa_info.txt