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@xxxxxxx>
---
sound/soc/amd/yc/acp6x-mach.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/sound/soc/amd/yc/acp6x-mach.c b/sound/soc/amd/yc/acp6x-mach.c
index 959b70e8baf2..f06e6c1a7799 100644
--- a/sound/soc/amd/yc/acp6x-mach.c
+++ b/sound/soc/amd/yc/acp6x-mach.c
@@ -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);
--
2.34.1
