ASoC: tlv320dac33: Introduce prefill and playback state handlers

Ensure that the code is going to be readable, when new FIFO modes
are introduced later.
Move the prefill and playback state handling to inlined
functions.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/tlv320dac33.c

@@ -543,6 +543,44 @@ static int dac33_set_bias_level(struct snd_soc_codec *codec,
 	return 0;
 }
 
+static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
+{
+	struct snd_soc_codec *codec;
+
+	codec = &dac33->codec;
+
+	switch (dac33->fifo_mode) {
+	case DAC33_FIFO_MODE1:
+		dac33_write16(codec, DAC33_NSAMPLE_MSB,
+				DAC33_THRREG(dac33->nsample));
+		dac33_write16(codec, DAC33_PREFILL_MSB,
+				DAC33_THRREG(dac33->alarm_threshold));
+		break;
+	default:
+		dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
+							dac33->fifo_mode);
+		break;
+	}
+}
+
+static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
+{
+	struct snd_soc_codec *codec;
+
+	codec = &dac33->codec;
+
+	switch (dac33->fifo_mode) {
+	case DAC33_FIFO_MODE1:
+		dac33_write16(codec, DAC33_NSAMPLE_MSB,
+				DAC33_THRREG(dac33->nsample));
+		break;
+	default:
+		dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
+							dac33->fifo_mode);
+		break;
+	}
+}
+
 static void dac33_work(struct work_struct *work)
 {
 	struct snd_soc_codec *codec;
@@ -556,14 +594,10 @@ static void dac33_work(struct work_struct *work)
 	switch (dac33->state) {
 	case DAC33_PREFILL:
 		dac33->state = DAC33_PLAYBACK;
-		dac33_write16(codec, DAC33_NSAMPLE_MSB,
-				DAC33_THRREG(dac33->nsample));
-		dac33_write16(codec, DAC33_PREFILL_MSB,
-				DAC33_THRREG(dac33->alarm_threshold));
+		dac33_prefill_handler(dac33);
 		break;
 	case DAC33_PLAYBACK:
-		dac33_write16(codec, DAC33_NSAMPLE_MSB,
-				DAC33_THRREG(dac33->nsample));
+		dac33_playback_handler(dac33);
 		break;
 	case DAC33_IDLE:
 		break;