From a91ab6509cd382dae4b7953155f47f276ff0d22f Mon Sep 17 00:00:00 2001
From: Akshu Agrawal <akshu.agrawal@amd.com>
Date: Sat, 28 Mar 2020 03:39:16 -0600
Subject: [PATCH] ASoC: AMD: Clear format bits before setting them
Git-commit: a91ab6509cd382dae4b7953155f47f276ff0d22f
Patch-mainline: v5.7-rc1
References: jsc#SLE-16518

This avoids residual bit form previous format when the format is changed.
Hence, the resultant format is not an invalid one.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@amd.com>
Link: https://lore.kernel.org/r/20200328093921.32211-1-akshu.agrawal@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/amd/raven/acp3x-i2s.c | 1 +
 sound/soc/amd/raven/acp3x.h     | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
index 3a3c47e820ab..f160d35a6832 100644
--- a/sound/soc/amd/raven/acp3x-i2s.c
+++ b/sound/soc/amd/raven/acp3x-i2s.c
@@ -139,6 +139,7 @@ static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream,
 		rv_writel(adata->tdm_fmt, rtd->acp3x_base + frmt_reg);
 	}
 	val = rv_readl(rtd->acp3x_base + reg_val);
+	val &= ~ACP3x_ITER_IRER_SAMP_LEN_MASK;
 	val = val | (rtd->xfer_resolution  << 3);
 	rv_writel(val, rtd->acp3x_base + reg_val);
 	return 0;
diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
index 21e7ac017f2b..03fe93913e12 100644
--- a/sound/soc/amd/raven/acp3x.h
+++ b/sound/soc/amd/raven/acp3x.h
@@ -76,6 +76,8 @@
 #define ACP_POWERED_OFF			0x02
 #define ACP_POWER_OFF_IN_PROGRESS	0x03
 
+#define ACP3x_ITER_IRER_SAMP_LEN_MASK	0x38
+
 struct acp3x_platform_info {
 	u16 play_i2s_instance;
 	u16 cap_i2s_instance;
-- 
2.16.4