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soundwire: slave: lookup SDCA version and functions

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Use SDCA helpers to get the basic information and store it in the
slave context. The information will be optionally be used in codec
drivers to register sub-devices for each Function.

When platforms are not based on ACPI the helpers do absolutely
nothing.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Link: https://patch.msgid.link/20241016102333.294448-5-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2024-10-16 18:23:26 +08:00 committed by Mark Brown
parent 3a513da1ae
commit 0c673d2862
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 15 additions and 0 deletions
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1
drivers/soundwire/Kconfig
View File

@ -6,6 +6,7 @@
menuconfig SOUNDWIRE
tristate "SoundWire support"
depends on ACPI || OF
depends on SND_SOC_SDCA_OPTIONAL
help
SoundWire is a 2-Pin interface with data and clock line ratified
by the MIPI Alliance. SoundWire is used for transporting data

14
drivers/soundwire/slave.c
View File

@ -5,6 +5,7 @@
#include <linux/of.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_type.h>
#include <sound/sdca.h>
#include "bus.h"
#include "sysfs_local.h"
@ -70,6 +71,17 @@ int sdw_slave_add(struct sdw_bus *bus,
list_add_tail(&slave->node, &bus->slaves);
mutex_unlock(&bus->bus_lock);
/*
* The Soundwire driver probe may optionally register SDCA
* sub-devices, one per Function. This means the information
* on the SDCA revision and the number/type of Functions need
* to be extracted from platform firmware before the SoundWire
* driver probe, and as a consequence before the SoundWire
* device_register() below.
*/
sdca_lookup_interface_revision(slave);
sdca_lookup_functions(slave);
ret = device_register(&slave->dev);
if (ret) {
dev_err(bus->dev, "Failed to add slave: ret %d\n", ret);
@ -259,3 +271,5 @@ int sdw_of_find_slaves(struct sdw_bus *bus)
return 0;
}
MODULE_IMPORT_NS(SND_SOC_SDCA);