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ALSA: hda: intel-sdw-acpi: go through HDAS ACPI at max depth of 2

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In the HDAS ACPI scope, the SoundWire may not be the direct child of HDAS.
It needs to go through the ACPI table at max depth of 2 to find the
SoundWire device from HDAS.

Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20211221010817.23636-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Libin Yang 2021-12-21 09:08:17 +08:00 committed by Takashi Iwai
parent 385f287f98
commit 78ea40efb4
1 changed files with 7 additions and 1 deletions
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8
sound/hda/intel-sdw-acpi.c
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@ -165,8 +165,14 @@ int sdw_intel_acpi_scan(acpi_handle *parent_handle,
acpi_status status;
info->handle = NULL;
/*
* In the HDAS ACPI scope, 'SNDW' may be either the child of
* 'HDAS' or the grandchild of 'HDAS'. So let's go through
* the ACPI from 'HDAS' at max depth of 2 to find the 'SNDW'
* device.
*/
status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
parent_handle, 1,
parent_handle, 2,
sdw_intel_acpi_cb,
NULL, info, NULL);
if (ACPI_FAILURE(status) || info->handle == NULL)