ASoC: rt1015: Add condition to prevent SoC providing bclk in ratio of 50 times of sample rate.

Add condition to prevent SoC providing bclk in ratio of 50 times of sample rate.
Signed-off-by: Jack Yu <jack.yu@realtek.com>
Link: https://lore.kernel.org/r/20200504112013.2499-1-jack.yu@realtek.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt1015.c

@@ -780,6 +780,14 @@ static int rt1015_set_component_pll(struct snd_soc_component *component,
 		freq_out == rt1015->pll_out)
 		return 0;
 
+	if (source == RT1015_PLL_S_BCLK) {
+		if (rt1015->bclk_ratio == 0) {
+			dev_err(component->dev,
+				"Can not support bclk ratio as 0.\n");
+			return -EINVAL;
+		}
+	}
+
 	switch (source) {
 	case RT1015_PLL_S_MCLK:
 		snd_soc_component_update_bits(component, RT1015_CLK2,
@@ -819,12 +827,30 @@ static int rt1015_set_component_pll(struct snd_soc_component *component,
 	return 0;
 }
 
+static int rt1015_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
+{
+	struct snd_soc_component *component = dai->component;
+	struct rt1015_priv *rt1015 = snd_soc_component_get_drvdata(component);
+
+	dev_dbg(component->dev, "%s ratio=%d\n", __func__, ratio);
+
+	rt1015->bclk_ratio = ratio;
+
+	if (ratio == 50) {
+		dev_dbg(component->dev, "Unsupport bclk ratio\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static int rt1015_probe(struct snd_soc_component *component)
 {
 	struct rt1015_priv *rt1015 =
 		snd_soc_component_get_drvdata(component);
 
 	rt1015->component = component;
+	rt1015->bclk_ratio = 0;
 	snd_soc_component_write(component, RT1015_BAT_RPO_STEP1, 0x061c);
 
 	return 0;
@@ -844,6 +870,7 @@ static void rt1015_remove(struct snd_soc_component *component)
 static struct snd_soc_dai_ops rt1015_aif_dai_ops = {
 	.hw_params = rt1015_hw_params,
 	.set_fmt = rt1015_set_dai_fmt,
+	.set_bclk_ratio = rt1015_set_bclk_ratio,
 };
 
 static struct snd_soc_dai_driver rt1015_dai[] = {

sound/soc/codecs/rt1015.h

@@ -362,6 +362,7 @@ struct rt1015_priv {
 	int sysclk_src;
 	int lrck;
 	int bclk;
+	int bclk_ratio;
 	int id;
 	int pll_src;
 	int pll_in;