Re: [PATCH RFC v2 1/2] ASoC: amd: acp: Add ACP70 ACPI flag override for LG gram 16Z95U

["Mukunda,Vijendar" <vijendar.mukunda@amd.com>]

On 11/11/26 07:09, fixca wrote:
> [You don't often get email from jaehoon1744@dankook.ac.kr. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ]
>
> From: Jaehoon Kim  <jaehoon1744@dankook.ac.kr>
>
> 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 <jaehoon1744@dankook.ac.kr>
> Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Reviwed-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
> ---
> 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