From d696a61413b405a13bbe04f31e6f4531a426fee7 Mon Sep 17 00:00:00 2001
From: Jack Yu <jack.yu@realtek.com>
Date: Mon, 4 May 2020 19:20:13 +0800
Subject: [PATCH] ASoC: rt1015: Add condition to prevent SoC providing bclk in ratio of 50 times of sample rate.
Git-commit: d696a61413b405a13bbe04f31e6f4531a426fee7
Patch-mainline: v5.8-rc1
References: jsc#SLE-16518

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.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/codecs/rt1015.c | 27 +++++++++++++++++++++++++++
 sound/soc/codecs/rt1015.h |  1 +
 2 files changed, 28 insertions(+)

diff --git a/sound/soc/codecs/rt1015.c b/sound/soc/codecs/rt1015.c
index bb310bc7febd..5eb07a430ae3 100644
--- a/sound/soc/codecs/rt1015.c
+++ b/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[] = {
diff --git a/sound/soc/codecs/rt1015.h b/sound/soc/codecs/rt1015.h
index ef3745a4faae..6fbe802082c4 100644
--- a/sound/soc/codecs/rt1015.h
+++ b/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;
-- 
2.16.4