[PATCH] ASoC: amd: acp-config: force SoundWire probe on Dell 14S DS14265

[Art O Cathain via B4 Relay]

From: Art O Cathain <art.home@xxxxxxxxx>

The BIOS on the Dell 14S DS14265 (ACP PCI revision 0x72) reports
acp-audio-config-flag = FLAG_AMD_LEGACY_ONLY_DMIC. As a result
snd_pci_ps returns early and the SoundWire links are never scanned,
while the legacy snd_acp_pci driver probes the device, finds no
matching machine driver ("No matching ASoC machine driver found") and
no internal sound card is created. The CS42L45 headset codec on link 0
and the two CS35L63 speaker amplifiers on link 1 never enumerate.

Add a DMI entry for the model to the ACP70 ACPI flag override table so
the firmware-provided flag is overridden and snd_pci_ps probes instead.
Match on the product name rather than the board name, as the same
symptom has been reported on several boards of this model (09PVND,
0M0J65, 0C7F12).

Tested on a DS14265 (board 09PVND, BIOS 1.5.3) with Debian's 7.2.6
kernel, with and without this entry. With it, snd_pci_ps binds, both
SoundWire links come up, the CS42L45 and both CS35L63 enumerate, the
existing CS42L45 + 2x CS35L63 machine entry matches, the amplifiers
load their firmware and calibration, and the amd-soundwire card plays
through both the internal speakers and the headphone jack. Also
build-tested on asoc-next with W=1.

Developed with AI assistance. Claude read the ACP driver source,
identified the BIOS flag as the cause and the override table as the
fix, wrote the DMI entry and the out-of-tree test module, and drafted
this changelog. All hardware testing was done by the submitter, who
has reviewed the change, understands it and takes responsibility for
it.

Cc: stable@xxxxxxxxxxxxxxx
Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Art O Cathain <art.home@xxxxxxxxx>
---
 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 30e01bc47ee0c2b28f369358cd3ea18897ff0c5c..2fb9789cac0ace8365b2c98c21f2ef1a18b6093f 100644
--- a/sound/soc/amd/acp-config.c
+++ b/sound/soc/amd/acp-config.c
@@ -98,6 +98,13 @@ static const struct dmi_system_id acp70_acpi_flag_override_table[] = {
 			DMI_MATCH(DMI_BOARD_NAME, "8EA2"),
 		},
 	},
+	{
+		/* Dell 14S DS14265 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Dell 14S DS14265"),
+		},
+	},
 	{}
 };
 

---
base-commit: 0f8bc3b93b76d16682a4d4999f9559b1e18016f9
change-id: 20261016-dell-14s-acp-6628310dd359

Best regards,
-- 
Art O Cathain <art.home@xxxxxxxxx>