linux-kernel - [PATCH] ASoC: amd: Changing Audio Format does not reflect.

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Date:   Thu, 19 Mar 2020 16:52:53 +0530
From:   Ravulapati Vishnu vardhan rao 
        <Vishnuvardhanrao.Ravulapati@....com>
To:     unlisted-recipients:; (no To-header on input)
CC:     <Alexander.Deucher@....com>, <broonie@...nel.org>,
        "Ravulapati Vishnu vardhan rao" <Vishnuvardhanrao.Ravulapati@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Akshu Agrawal <akshu.agrawal@....com>,
        Wei Yongjun <weiyongjun1@...wei.com>,
        "moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM..." 
        <alsa-devel@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH] ASoC: amd: Changing Audio Format does not reflect.

When you run aplay subsequently as below by changing the stream format:

aplay -Dhw:2,0 -c2 -fS16_LE -r48000 /dev/zero -vv -d 5;aplay -Dhw:2,0
-c2 -fS24_LE -r48000 /dev/zero -vv
as a single command, the format gets corrupted and audio does not play.

So clear the ACP_(I2S/BT)TDM_ITER/IRER register when dma stops.

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@....com>
---
 sound/soc/amd/raven/acp3x-i2s.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
index 3a3c47e..b07c50a 100644
--- a/sound/soc/amd/raven/acp3x-i2s.c
+++ b/sound/soc/amd/raven/acp3x-i2s.c
@@ -240,9 +240,7 @@ static int acp3x_i2s_trigger(struct snd_pcm_substream *substream,
 				reg_val = mmACP_I2STDM_IRER;
 			}
 		}
-		val = rv_readl(rtd->acp3x_base + reg_val);
-		val = val & ~BIT(0);
-		rv_writel(val, rtd->acp3x_base + reg_val);
+		rv_writel(0, rtd->acp3x_base + reg_val);
 
 		if (!(rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER) & BIT(0)) &&
 		     !(rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER) & BIT(0)))
-- 
2.7.4