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ASoC: amd: Add support for enabling DMIC on acp6x via _DSD

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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: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20220411134532.13538-3-mario.limonciello@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mario Limonciello 2022-04-11 08:45:32 -05:00 committed by Mark Brown
parent e521f08778
commit 5426f506b5
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GPG Key ID: 24D68B725D5487D0
1 changed files with 13 additions and 0 deletions
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13
sound/soc/amd/yc/acp6x-mach.c
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@ -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);