Unverified Commit 5426f506 authored by Mario Limonciello's avatar Mario Limonciello Committed by Mark Brown
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ASoC: amd: Add support for enabling DMIC on acp6x via _DSD 



Currently the acp6x machine driver requires a hardcoded list of systems
that physically have DMIC connected.

To avoid having to continually add to an evergrowing list of systems add
support for a _DSD that can advertise this.

OEMs can add this _DSD to their BIOS under the ACP device to automatically
add the device to this driver without requiring any driver modifications.

Signed-off-by: default avatarMario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20220411134532.13538-3-mario.limonciello@amd.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent e521f087

sound/soc/amd/yc/acp6x-mach.c

+13 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <sound/pcm_params.h>

#include <linux/io.h>

#include <linux/dmi.h>

#include <linux/acpi.h>



#include "acp6x.h"
@@ -178,8 +179,19 @@ static int acp6x_probe(struct platform_device *pdev) 
	const struct dmi_system_id *dmi_id;

	struct acp6x_pdm *machine = NULL;

	struct snd_soc_card *card;

	struct acpi_device *adev;

	int ret;



	/* check the parent device's firmware node has _DSD or not */

	adev = ACPI_COMPANION(pdev->dev.parent);

	if (adev) {

		const union acpi_object *obj;



		if (!acpi_dev_get_property(adev, "AcpDmicConnected", ACPI_TYPE_INTEGER, &obj) &&

		    obj->integer.value == 1)

			platform_set_drvdata(pdev, &acp6x_card);

	}



	/* check for any DMI overrides */

	dmi_id = dmi_first_match(yc_acp_quirk_table);

	if (dmi_id)
@@ -188,6 +200,7 @@ static int acp6x_probe(struct platform_device *pdev) 
	card = platform_get_drvdata(pdev);

	if (!card)

		return -ENODEV;

	dev_info(&pdev->dev, "Enabling ACP DMIC support via %s", dmi_id ? "DMI" : "ACPI");

	acp6x_card.dev = &pdev->dev;



	snd_soc_card_set_drvdata(card, machine);