ASoC: rt722: make regmap cache-only in probe

This patch makes sure the access to the codecs is cached until the device is enumerated.

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Link: https://patch.msgid.link/20250519090645.2620292-1-shumingf@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: shumingfan

sound/soc/codecs/rt722-sdca-sdw.h

@@ -34,6 +34,7 @@ static const struct reg_default rt722_sdca_reg_defaults[] = {
 	{ 0x200003c, 0xc214 },
 	{ 0x2000046, 0x8004 },
 	{ 0x5810000, 0x702d },
+	{ 0x6100000, 0x0201 },
 	{ 0x6100006, 0x0005 },
 	{ 0x6100010, 0x2630 },
 	{ 0x6100011, 0x152f },

sound/soc/codecs/rt722-sdca.c

@@ -1309,6 +1309,8 @@ int rt722_sdca_init(struct device *dev, struct regmap *regmap, struct sdw_slave
 	rt722->slave = slave;
 	rt722->regmap = regmap;
 
+	regcache_cache_only(rt722->regmap, true);
+
 	mutex_init(&rt722->calibrate_mutex);
 	mutex_init(&rt722->disable_irq_lock);
 
@@ -1521,8 +1523,8 @@ int rt722_sdca_io_init(struct device *dev, struct sdw_slave *slave)
 	if (rt722->hw_init)
 		return 0;
 
+	regcache_cache_only(rt722->regmap, false);
 	if (rt722->first_hw_init) {
-		regcache_cache_only(rt722->regmap, false);
 		regcache_cache_bypass(rt722->regmap, true);
 	} else {
 		/*