[PATCH] ASoC: amd: acp-config: force SoundWire probe on HP OmniBook X Flip 16

[Sehat Mahde]

The BIOS on the HP OmniBook X Flip 16-cc0xxx (board 8EA2) reports
acp-audio-config-flag = FLAG_AMD_LEGACY_ONLY_DMIC. This binds the
legacy ACP driver and registers a PDM-only card, so the SoundWire
links are never scanned and the two TAS2783 speaker amplifiers and
RT712-VB codec do not enumerate.

Add a DMI entry for board 8EA2 to the ACP70 ACPI flag override table
so the firmware-provided flag is overridden and snd_pci_ps probes
instead.

On the affected system, an otherwise identical upstream kernel
without this entry binds snd_acp_pci, enumerates no SoundWire slave
devices and exposes no internal speaker PCM. With the entry added,
snd_pci_ps binds, both TAS2783 amplifiers and the RT712-VB enumerate
over SoundWire, and the amd-soundwire card exposes the internal
speaker playback PCM.

Developed with AI assistance. ChatGPT helped analyze the ACP and
SoundWire behavior, structure the controlled A/B testing, and draft
the patch changelog. All hardware measurements, kernel builds,
reboots and playback tests were performed by the submitter. The
submitter has reviewed the change, understands it and takes
responsibility for it.

Assisted-by: ChatGPT:GPT-5.6 Sol
Signed-off-by: Sehat Mahde <hskmahde@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 3021dc498..28a7283cb 100644
--- a/sound/soc/amd/acp-config.c
+++ b/sound/soc/amd/acp-config.c
@@ -70,6 +70,13 @@ static const struct dmi_system_id acp70_acpi_flag_override_table[] = {
 			DMI_MATCH(DMI_BOARD_NAME, "8EA1"),
 		},
 	},
+	{
+		/* HP OmniBook X Flip 16-cc0xxx */
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "HP"),
+			DMI_MATCH(DMI_BOARD_NAME, "8EA2"),
+		},
+	},
 	{}
 };
 

base-commit: 66498c75b4f8017f62d720d9b59675bdf3abce91
-- 
2.55.0