ASoC: cs42l42: Fix LRCLK frame start edge

An I2S frame starts on the falling edge of LRCLK so ASP_STP must
be 0.

At the same time, move other format settings in the same register
from cs42l42_pll_config() to cs42l42_set_dai_fmt() where you'd
expect to find them, and merge into a single write.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: 2c394ca ("ASoC: Add support for CS42L42 codec")
Link: https://lore.kernel.org/r/20210805161111.10410-2-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: rfvirgil

sound/soc/codecs/cs42l42.c

@@ -667,15 +667,6 @@ static int cs42l42_pll_config(struct snd_soc_component *component)
 					CS42L42_FSYNC_PULSE_WIDTH_MASK,
 					CS42L42_FRAC1_VAL(fsync - 1) <<
 					CS42L42_FSYNC_PULSE_WIDTH_SHIFT);
-			snd_soc_component_update_bits(component,
-					CS42L42_ASP_FRM_CFG,
-					CS42L42_ASP_5050_MASK,
-					CS42L42_ASP_5050_MASK);
-			/* Set the frame delay to 1.0 SCLK clocks */
-			snd_soc_component_update_bits(component, CS42L42_ASP_FRM_CFG,
-					CS42L42_ASP_FSD_MASK,
-					CS42L42_ASP_FSD_1_0 <<
-					CS42L42_ASP_FSD_SHIFT);
 			/* Set the sample rates (96k or lower) */
 			snd_soc_component_update_bits(component, CS42L42_FS_RATE_EN,
 					CS42L42_FS_EN_MASK,
@@ -775,6 +766,18 @@ static int cs42l42_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
 	/* interface format */
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
+		/*
+		 * 5050 mode, frame starts on falling edge of LRCLK,
+		 * frame delayed by 1.0 SCLKs
+		 */
+		snd_soc_component_update_bits(component,
+					      CS42L42_ASP_FRM_CFG,
+					      CS42L42_ASP_STP_MASK |
+					      CS42L42_ASP_5050_MASK |
+					      CS42L42_ASP_FSD_MASK,
+					      CS42L42_ASP_5050_MASK |
+					      (CS42L42_ASP_FSD_1_0 <<
+						CS42L42_ASP_FSD_SHIFT));
 		break;
 	default:
 		return -EINVAL;