ASoC: codecs: ad193x: Add runtime support for DSP_A and I2S modes

The driver only supports DPS_A for DAC, which is configured at probe.
This patch adds support for DSP_A and I2S modes by using the set_fmt()
callback.

A trivial break is also removed from a case's default branch.
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/ad193x.c

@@ -188,23 +188,26 @@ static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 {
 	struct ad193x_priv *ad193x = snd_soc_component_get_drvdata(codec_dai->component);
 	unsigned int adc_serfmt = 0;
+	unsigned int dac_serfmt = 0;
 	unsigned int adc_fmt = 0;
 	unsigned int dac_fmt = 0;
 
 	/* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
-	 * with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
+	 * with TDM), ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A) and DAC I2S mode
+	 * (SND_SOC_DAIFMT_I2S)
 	 */
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
 		adc_serfmt |= AD193X_ADC_SERFMT_TDM;
+		dac_serfmt |= AD193X_DAC_SERFMT_STEREO;
 		break;
 	case SND_SOC_DAIFMT_DSP_A:
 		adc_serfmt |= AD193X_ADC_SERFMT_AUX;
+		dac_serfmt |= AD193X_DAC_SERFMT_TDM;
 		break;
 	default:
 		if (ad193x_has_adc(ad193x))
 			return -EINVAL;
-		break;
 	}
 
 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
@@ -261,6 +264,8 @@ static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
 		regmap_update_bits(ad193x->regmap, AD193X_ADC_CTRL2,
 				   AD193X_ADC_FMT_MASK, adc_fmt);
 	}
+	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL0,
+			   AD193X_DAC_SERFMT_MASK, dac_serfmt);
 	regmap_update_bits(ad193x->regmap, AD193X_DAC_CTRL1,
 		AD193X_DAC_FMT_MASK, dac_fmt);