[PATCH] ASoC: amd: fix DMIC detection on Lenovo ThinkPad P14s Gen 6 AMD

[Nikita Koval <me@nikitakoval.com>]

The Lenovo ThinkPad P14s Gen 6 AMD with BIOS R2XET41W (1.21)
reports acp-audio-config-flag as FLAG_AMD_LEGACY_ONLY_DMIC.

This causes the legacy ACP driver path to be selected and results in:

  No matching ASoC machine driver found

The firmware otherwise exposes a valid PDM microphone device through
ACPI, with _ADR 0x02 and acp-audio-device-type 0x02.

After selecting the snd_pci_ps path, the firmware _WOV method returns
0. The driver currently treats this as disabling the PDM/DMIC path,
which prevents the internal microphone from being registered.

Add DMI quirks for the ThinkPad P14s Gen 6 AMD to ignore the firmware
ACP config flag and the _WOV value.

With these quirks applied, the internal microphone is registered as:

  acp63: DMIC capture dmic-hifi-0

and capture works correctly.

DMI:
  System Vendor: LENOVO
  Product Name: 21RV000NUS
  Product Version: ThinkPad P14s Gen 6 AMD

Tested with BIOS R2XET41W (1.21) and Linux 7.2.4.

Signed-off-by: Nikita Koval <me@nikitakoval.com>
---
 sound/soc/amd/acp-config.c |  7 +++++++
 sound/soc/amd/ps/pci-ps.c  | 14 +++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/sound/soc/amd/acp-config.c b/sound/soc/amd/acp-config.c
index 2d50be819..0372906f9 100644
--- a/sound/soc/amd/acp-config.c
+++ b/sound/soc/amd/acp-config.c
@@ -77,6 +77,13 @@ static const struct dmi_system_id acp70_acpi_flag_override_table[] = {
 			DMI_MATCH(DMI_BOARD_NAME, "8EA2"),
 		},
 	},
+	{
+		/* Lenovo ThinkPad P14s Gen 6 AMD */
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad P14s Gen 6 AMD")
+		},
+	},
 	{}
 };
 
diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
index 729f9aaba..afb8c78d3 100644
--- a/sound/soc/amd/ps/pci-ps.c
+++ b/sound/soc/amd/ps/pci-ps.c
@@ -10,6 +10,7 @@
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/delay.h>
+#include <linux/dmi.h>
 #include <linux/platform_device.h>
 #include <linux/acpi.h>
 #include <linux/interrupt.h>
@@ -401,6 +402,17 @@ static int acp63_machine_register(struct device *dev)
 	return 0;
 }
 
+static const struct dmi_system_id acp_ignore_wov_table[] = {
+	{
+		/* Lenovo ThinkPad P14s Gen 6 AMD */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad P14s Gen 6 AMD"),
+		},
+	},
+	{}
+};
+
 static int get_acp63_device_config(struct pci_dev *pci, struct acp63_dev_data *acp_data)
 {
 	struct acpi_device *pdm_dev;
@@ -430,7 +442,7 @@ static int get_acp63_device_config(struct pci_dev *pci, struct acp63_dev_data *a
 
 		handle = ACPI_HANDLE(&pci->dev);
 		ret = acpi_evaluate_integer(handle, "_WOV", NULL, &dmic_status);
-		if (!ACPI_FAILURE(ret))
+		if (!ACPI_FAILURE(ret) && !dmi_check_system(acp_ignore_wov_table))
 			wov_en = dmic_status;
 	}
 
-- 
2.55.0