[alsa-devel] [PATCH 08/19] ASoC: Intel: bytcr_rt5640: Configure PLL1 before using it

[Hans de Goede]

When platform_clock_control() first selects PLL1 as sysclk the PLL_CTRL
registers have not been setup yet and we effectively have an invalid clock
configuration until byt_rt5640_aif1_hw_params() gets called.

Add a new byt_rt5640_prepare_and_enable_pll1() helper and use that from
both platform_clock_control() and byt_rt5640_aif1_hw_params() to fix this.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 sound/soc/intel/boards/bytcr_rt5640.c | 100 +++++++++++++-------------
 1 file changed, 49 insertions(+), 51 deletions(-)

diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c
index 84ce98ebd00e..0f587d394b06 100644
--- a/sound/soc/intel/boards/bytcr_rt5640.c
+++ b/sound/soc/intel/boards/bytcr_rt5640.c
@@ -141,6 +141,52 @@ static void log_quirks(struct device *dev)
 	}
 }
 
+static int byt_rt5640_prepare_and_enable_pll1(struct snd_soc_dai *codec_dai,
+					      int rate)
+{
+	int ret;
+
+	/* Configure the PLL before selecting it */
+	if (!(byt_rt5640_quirk & BYT_RT5640_MCLK_EN)) {
+		/* use bitclock as PLL input */
+		if ((byt_rt5640_quirk & BYT_RT5640_SSP0_AIF1) ||
+		    (byt_rt5640_quirk & BYT_RT5640_SSP0_AIF2)) {
+			/* 2x16 bit slots on SSP0 */
+			ret = snd_soc_dai_set_pll(codec_dai, 0,
+						  RT5640_PLL1_S_BCLK1,
+						  rate * 32, rate * 512);
+		} else {
+			/* 2x15 bit slots on SSP2 */
+			ret = snd_soc_dai_set_pll(codec_dai, 0,
+						  RT5640_PLL1_S_BCLK1,
+						  rate * 50, rate * 512);
+		}
+	} else {
+		if (byt_rt5640_quirk & BYT_RT5640_MCLK_25MHZ) {
+			ret = snd_soc_dai_set_pll(codec_dai, 0,
+						  RT5640_PLL1_S_MCLK,
+						  25000000, rate * 512);
+		} else {
+			ret = snd_soc_dai_set_pll(codec_dai, 0,
+						  RT5640_PLL1_S_MCLK,
+						  19200000, rate * 512);
+		}
+	}
+
+	if (ret < 0) {
+		dev_err(codec_dai->codec->dev, "can't set pll: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_sysclk(codec_dai, RT5640_SCLK_S_PLL1,
+				     rate * 512, SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		dev_err(codec_dai->codec->dev, "can't set clock %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
 
 #define BYT_CODEC_DAI1	"rt5640-aif1"
 #define BYT_CODEC_DAI2	"rt5640-aif2"
@@ -173,9 +219,7 @@ static int platform_clock_control(struct snd_soc_dapm_widget *w,
 				return ret;
 			}
 		}
-		ret = snd_soc_dai_set_sysclk(codec_dai, RT5640_SCLK_S_PLL1,
-					     48000 * 512,
-					     SND_SOC_CLOCK_IN);
+		ret = byt_rt5640_prepare_and_enable_pll1(codec_dai, 48000);
 	} else {
 		/*
 		 * Set codec clock source to internal clock before
@@ -299,55 +343,9 @@ static int byt_rt5640_aif1_hw_params(struct snd_pcm_substream *substream,
 					struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_dai *codec_dai = rtd->codec_dai;
-	int ret;
-
-	ret = snd_soc_dai_set_sysclk(codec_dai, RT5640_SCLK_S_PLL1,
-				     params_rate(params) * 512,
-				     SND_SOC_CLOCK_IN);
-
-	if (ret < 0) {
-		dev_err(rtd->dev, "can't set codec clock %d\n", ret);
-		return ret;
-	}
+	struct snd_soc_dai *dai = rtd->codec_dai;
 
-	if (!(byt_rt5640_quirk & BYT_RT5640_MCLK_EN)) {
-		/* use bitclock as PLL input */
-		if ((byt_rt5640_quirk & BYT_RT5640_SSP0_AIF1) ||
-			(byt_rt5640_quirk & BYT_RT5640_SSP0_AIF2)) {
-
-			/* 2x16 bit slots on SSP0 */
-			ret = snd_soc_dai_set_pll(codec_dai, 0,
-						RT5640_PLL1_S_BCLK1,
-						params_rate(params) * 32,
-						params_rate(params) * 512);
-		} else {
-			/* 2x15 bit slots on SSP2 */
-			ret = snd_soc_dai_set_pll(codec_dai, 0,
-						RT5640_PLL1_S_BCLK1,
-						params_rate(params) * 50,
-						params_rate(params) * 512);
-		}
-	} else {
-		if (byt_rt5640_quirk & BYT_RT5640_MCLK_25MHZ) {
-			ret = snd_soc_dai_set_pll(codec_dai, 0,
-						RT5640_PLL1_S_MCLK,
-						25000000,
-						params_rate(params) * 512);
-		} else {
-			ret = snd_soc_dai_set_pll(codec_dai, 0,
-						RT5640_PLL1_S_MCLK,
-						19200000,
-						params_rate(params) * 512);
-		}
-	}
-
-	if (ret < 0) {
-		dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
-		return ret;
-	}
-
-	return 0;
+	return byt_rt5640_prepare_and_enable_pll1(dai, params_rate(params));
 }
 
 static int byt_rt5640_quirk_cb(const struct dmi_system_id *id)
-- 
2.17.0