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ASoC: SDCA: Add lock to serialise the Function initialisation

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To avoid issues on some devices serialise the boot of each SDCA Function
from the others.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
Link: https://patch.msgid.link/20260109145206.3456151-5-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax
2026-01-09 14:52:06 +00:00
committed by Mark Brown
parent ffd7e8a101
commit da7afdc79c
3 changed files with 8 additions and 0 deletions
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1
sound/soc/sdca/sdca_class.c
View File

@@ -205,6 +205,7 @@ static int class_sdw_probe(struct sdw_slave *sdw, const struct sdw_device_id *id
drv->dev = dev;
drv->sdw = sdw;
mutex_init(&drv->regmap_lock);
mutex_init(&drv->init_lock);
dev_set_drvdata(drv->dev, drv);

2
sound/soc/sdca/sdca_class.h
View File

@@ -28,6 +28,8 @@ struct sdca_class_drv {
struct sdca_interrupt_info *irq_info;
struct mutex regmap_lock;
/* Serialise function initialisations */
struct mutex init_lock;
struct work_struct boot_work;
struct completion device_attach;

5
sound/soc/sdca/sdca_class_function.c
View File

@@ -8,6 +8,7 @@
*/
#include <linux/auxiliary_bus.h>
#include <linux/cleanup.h>
#include <linux/minmax.h>
#include <linux/module.h>
#include <linux/pm.h>
@@ -244,6 +245,8 @@ static int class_function_boot(struct class_function_drv *drv)
unsigned int val;
int ret;
guard(mutex)(&drv->core->init_lock);
ret = regmap_read(drv->regmap, reg, &val);
if (ret < 0) {
dev_err(drv->dev, "failed to read function status: %d\n", ret);
@@ -418,6 +421,8 @@ static int class_function_runtime_resume(struct device *dev)
struct class_function_drv *drv = auxiliary_get_drvdata(auxdev);
int ret;
guard(mutex)(&drv->core->init_lock);
regcache_mark_dirty(drv->regmap);
regcache_cache_only(drv->regmap, false);