diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2024-10-16 12:23:26 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-10-17 19:42:12 +0200 |
| commit | 0c673d2862534955241f339d7331f384b5ea44af (patch) | |
| tree | a81dbc012e44b7b48c088651768b7de3c9490f42 /drivers | |
| parent | ASoC: SDCA: add initial module (diff) | |
| download | linux-0c673d2862534955241f339d7331f384b5ea44af.tar.xz linux-0c673d2862534955241f339d7331f384b5ea44af.zip | |
soundwire: slave: lookup SDCA version and functions
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/soundwire/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/soundwire/slave.c | 14 |
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/soundwire/Kconfig b/drivers/soundwire/Kconfig index 4d8f3b7024ae..f66f869dff2e 100644 --- a/drivers/soundwire/Kconfig +++ b/drivers/soundwire/Kconfig @@ -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 diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c index f1a4df6cfebd..97cf8bcca047 100644 --- a/drivers/soundwire/slave.c +++ b/drivers/soundwire/slave.c @@ -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); |