ASoC: tlv320aic3x: Optimize PLL programming in aic3x_set_bias_level

There is only need to enable/disable once the PLL when the bias is going
between on, prepare, standby and off states.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 6 insertions, 4 deletions

diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
index b3175860bcb..94dc707d902 100644
--- a/sound/soc/codecs/tlv320aic3x.c
+++ b/sound/soc/codecs/tlv320aic3x.c
@@ -1069,7 +1069,8 @@ static int aic3x_set_bias_level(struct snd_soc_codec *codec,
         case SND_SOC_BIAS_ON:
                 break;
         case SND_SOC_BIAS_PREPARE:
-                if (aic3x->master) {
+                if (codec->bias_level == SND_SOC_BIAS_STANDBY &&
+                    aic3x->master) {
                         /* enable pll */
                         reg = aic3x_read_reg_cache(codec, AIC3X_PLL_PROGA_REG);
                         aic3x_write(codec, AIC3X_PLL_PROGA_REG,
@@ -1077,15 +1078,16 @@ static int aic3x_set_bias_level(struct snd_soc_codec *codec,
                 }
                 break;
         case SND_SOC_BIAS_STANDBY:
-                /* fall through and disable pll */
-        case SND_SOC_BIAS_OFF:
-                if (aic3x->master) {
+                if (codec->bias_level == SND_SOC_BIAS_PREPARE &&
+                    aic3x->master) {
                         /* disable pll */
                         reg = aic3x_read_reg_cache(codec, AIC3X_PLL_PROGA_REG);
                         aic3x_write(codec, AIC3X_PLL_PROGA_REG,
                                     reg & ~PLL_ENABLE);
                 }
                 break;
+        case SND_SOC_BIAS_OFF:
+                break;
         }
         codec->bias_level = level;