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Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > From: Jaehoon Kim > > The LG gram 16 (16Z95U, AMD Ryzen AI 400 series, ACP rev 0x72) BIOS > sets "acp-audio-config-flag" to 0x10 (FLAG_AMD_LEGACY_ONLY_DMIC), but > the machine has no ACP PDM microphone. All audio endpoints are > SoundWire peripherals declared under the ACP SoundWire controller: > > link 0: RT713 (UAJ + SmartMic functions), _ADR 0x000030025D071301 > link 1: RT1320 (SmartAmp function), _ADR 0x000131025D132001 > > With the flag honoured, snd_pci_ps bails out with -ENODEV, the legacy > snd_acp_pci driver binds instead and fails with: > > platform acp_asoc_acp70.0: warning: No matching ASoC machine driver found > > so no sound card is created at all. > > Add the machine to acp70_acpi_flag_override_table so that the > SoundWire path is used. > > Tested on LG gram 16Z95U-GS59K (PCI SSID 1854:056c): with this change > snd_pci_ps binds and both peripherals enumerate > (sdw:0:0:025d:0713:01, sdw:0:1:025d:1320:01). > > Signed-off-by: Jaehoon Kim > Co-Authored-By: Claude Opus 5.5 Reviwed-by: Vijendar Mukunda > --- > v2: rebased onto broonie/sound for-next (v1 did not apply). > sound/soc/amd/acp-config.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/sound/soc/amd/acp-config.c b/sound/soc/amd/acp-config.c > index 3d4c852..febf559 100644 > --- a/sound/soc/amd/acp-config.c > +++ b/sound/soc/amd/acp-config.c > @@ -140,6 +140,13 @@ static const struct dmi_system_id acp70_acpi_flag_override_table[] = { > DMI_MATCH(DMI_PRODUCT_NAME, "Dell 14S DS14265"), > }, > }, > + { > + /* LG gram 16 16Z95U (ACP 7.2) */ > + .matches = { > + DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"), > + DMI_MATCH(DMI_PRODUCT_NAME, "16Z95U"), > + }, > + }, > {} > }; > > -- > 2.43.0