ASoC: da7213: Default PC counter to free-running when DAI disabled

Currently PC counter is always synchronised to DAI which means that
when the DAI is disabled, features such as ALC calibration cannot
be executed successfully. This patch makes sure that when the DAI
is disabled, PC counter is set to free-running.

Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/da7213.c

@@ -746,6 +746,10 @@ static int da7213_dai_event(struct snd_soc_dapm_widget *w,
 					    DA7213_DAI_CLK_EN_MASK,
 					    DA7213_DAI_CLK_EN_MASK);
 
+		/* PC synchronised to DAI */
+		snd_soc_update_bits(codec, DA7213_PC_COUNT,
+				    DA7213_PC_FREERUN_MASK, 0);
+
 		/* Slave mode, if SRM not enabled no need for status checks */
 		pll_ctrl = snd_soc_read(codec, DA7213_PLL_CTRL);
 		if (!(pll_ctrl & DA7213_PLL_SRM_EN))
@@ -767,6 +771,11 @@ static int da7213_dai_event(struct snd_soc_dapm_widget *w,
 
 		return 0;
 	case SND_SOC_DAPM_POST_PMD:
+		/* PC free-running */
+		snd_soc_update_bits(codec, DA7213_PC_COUNT,
+				    DA7213_PC_FREERUN_MASK,
+				    DA7213_PC_FREERUN_MASK);
+
 		/* Disable DAI clks if in master mode */
 		if (da7213->master)
 			snd_soc_update_bits(codec, DA7213_DAI_CLK_MODE,
@@ -1599,6 +1608,10 @@ static int da7213_probe(struct snd_soc_codec *codec)
 	/* Default to using SRM for slave mode */
 	da7213->srm_en = true;
 
+	/* Default PC counter to free-running */
+	snd_soc_update_bits(codec, DA7213_PC_COUNT, DA7213_PC_FREERUN_MASK,
+			    DA7213_PC_FREERUN_MASK);
+
 	/* Enable all Gain Ramps */
 	snd_soc_update_bits(codec, DA7213_AUX_L_CTRL,
 			    DA7213_GAIN_RAMP_EN, DA7213_GAIN_RAMP_EN);

sound/soc/codecs/da7213.h

@@ -413,6 +413,9 @@
 #define DA7213_DMIC_CLK_RATE_SHIFT				2
 #define DA7213_DMIC_CLK_RATE_MASK				(0x1 << 2)
 
+/* DA7213_PC_COUNT = 0x94 */
+#define DA7213_PC_FREERUN_MASK					(0x1 << 0)
+
 /* DA7213_DIG_CTRL = 0x99 */
 #define DA7213_DAC_L_INV_SHIFT					3
 #define DA7213_DAC_R_INV_SHIFT					7