[PATCH 1/2] ASoC: rt9120: Update internal setting and fix auto sync problem

[cy_huang]

From: ChiYuan Huang <cy_huang at richtek.com>

- Update internal setting to fix issue.
- Disable auto sync if fs is divided by 48.

Signed-off-by: ChiYuan Huang <cy_huang at richtek.com>
---
 sound/soc/codecs/rt9120.c | 28 +++++++++++++++++++++-------
 1 file changed, 21 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/rt9120.c b/sound/soc/codecs/rt9120.c
index f957498..d007d00 100644
--- a/sound/soc/codecs/rt9120.c
+++ b/sound/soc/codecs/rt9120.c
@@ -26,6 +26,7 @@
 #define RT9120_REG_INTERNAL0	0x65
 #define RT9120_REG_INTERNAL1	0x69
 #define RT9120_REG_UVPOPT	0x6C
+#define RT9120_REG_DIGCFG	0xF8
 
 #define RT9120_VID_MASK		GENMASK(15, 8)
 #define RT9120_SWRST_MASK	BIT(7)
@@ -46,6 +47,7 @@
 #define RT9120_CFG_WORDLEN_24	24
 #define RT9120_CFG_WORDLEN_32	32
 #define RT9120_DVDD_UVSEL_MASK	GENMASK(5, 4)
+#define RT9120_AUTOSYNC_MASK	BIT(6)
 
 #define RT9120_VENDOR_ID	0x4200
 #define RT9120_RESET_WAITMS	20
@@ -149,8 +151,7 @@ static int rt9120_codec_probe(struct snd_soc_component *comp)
 	snd_soc_component_init_regmap(comp, data->regmap);
 
 	/* Internal setting */
-	snd_soc_component_write(comp, RT9120_REG_INTERNAL1, 0x03);
-	snd_soc_component_write(comp, RT9120_REG_INTERNAL0, 0x69);
+	snd_soc_component_write(comp, RT9120_REG_INTERNAL0, 0x04);
 	return 0;
 }
 
@@ -201,8 +202,8 @@ static int rt9120_hw_params(struct snd_pcm_substream *substream,
 			    struct snd_soc_dai *dai)
 {
 	struct snd_soc_component *comp = dai->component;
-	unsigned int param_width, param_slot_width;
-	int width;
+	unsigned int param_width, param_slot_width, auto_sync;
+	int width, fs;
 
 	switch (width = params_width(param)) {
 	case 16:
@@ -240,6 +241,17 @@ static int rt9120_hw_params(struct snd_pcm_substream *substream,
 
 	snd_soc_component_update_bits(comp, RT9120_REG_I2SWL,
 				      RT9120_AUDWL_MASK, param_slot_width);
+
+	fs = width * params_channels(param);
+	/* If fs is divided by 48, disable auto sync */
+	if (fs % 48 == 0)
+		auto_sync = 0;
+	else
+		auto_sync = RT9120_AUTOSYNC_MASK;
+
+	snd_soc_component_update_bits(comp, RT9120_REG_DIGCFG,
+				      RT9120_AUTOSYNC_MASK, auto_sync);
+
 	return 0;
 }
 
@@ -281,7 +293,8 @@ static const struct regmap_range rt9120_rd_yes_ranges[] = {
 	regmap_reg_range(0x3A, 0x40),
 	regmap_reg_range(0x65, 0x65),
 	regmap_reg_range(0x69, 0x69),
-	regmap_reg_range(0x6C, 0x6C)
+	regmap_reg_range(0x6C, 0x6C),
+	regmap_reg_range(0xF8, 0xF8)
 };
 
 static const struct regmap_access_table rt9120_rd_table = {
@@ -299,7 +312,8 @@ static const struct regmap_range rt9120_wr_yes_ranges[] = {
 	regmap_reg_range(0x40, 0x40),
 	regmap_reg_range(0x65, 0x65),
 	regmap_reg_range(0x69, 0x69),
-	regmap_reg_range(0x6C, 0x6C)
+	regmap_reg_range(0x6C, 0x6C),
+	regmap_reg_range(0xF8, 0xF8)
 };
 
 static const struct regmap_access_table rt9120_wr_table = {
@@ -370,7 +384,7 @@ static int rt9120_reg_write(void *context, unsigned int reg, unsigned int val)
 static const struct regmap_config rt9120_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 32,
-	.max_register = RT9120_REG_UVPOPT,
+	.max_register = RT9120_REG_DIGCFG,
 
 	.reg_read = rt9120_reg_read,
 	.reg_write = rt9120_reg_write,
-- 
2.7.4