From 67e69e1d46becd934a03489c38fc42bb2510c1c6 Mon Sep 17 00:00:00 2001
From: Akshu Agrawal <akshu.agrawal@amd.com>
Date: Tue, 28 Jan 2020 16:00:22 +0530
Subject: [PATCH] ASoC: amd: Fix simultaneous playback and capture
Git-commit: 67e69e1d46becd934a03489c38fc42bb2510c1c6
Patch-mainline: v5.6-rc1
References: jsc#SLE-16518

Stopping of one stream is killing the other stream when they
are running simultaneously. This is because, IER register is
cleared which disables I2S and overrides any other block enables.

Clearing IER register only when all streams on a channel are disabled,
fixes the issue.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Link: https://lore.kernel.org/r/20200128103029.128841-1-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 | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c
index bf51cadf8682..31cd4008e33f 100644
--- a/sound/soc/amd/raven/acp3x-i2s.c
+++ b/sound/soc/amd/raven/acp3x-i2s.c
@@ -234,30 +234,32 @@ static int acp3x_i2s_trigger(struct snd_pcm_substream *substream,
 			switch (rtd->i2s_instance) {
 			case I2S_BT_INSTANCE:
 				reg_val = mmACP_BTTDM_ITER;
-				ier_val = mmACP_BTTDM_IER;
 				break;
 			case I2S_SP_INSTANCE:
 			default:
 				reg_val = mmACP_I2STDM_ITER;
-				ier_val = mmACP_I2STDM_IER;
 			}
 
 		} else {
 			switch (rtd->i2s_instance) {
 			case I2S_BT_INSTANCE:
 				reg_val = mmACP_BTTDM_IRER;
-				ier_val = mmACP_BTTDM_IER;
 				break;
 			case I2S_SP_INSTANCE:
 			default:
 				reg_val = mmACP_I2STDM_IRER;
-				ier_val = mmACP_I2STDM_IER;
 			}
 		}
 		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 + ier_val);
+
+		if (!(rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER) & BIT(0)) &&
+		     !(rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER) & BIT(0)))
+			rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER);
+		if (!(rv_readl(rtd->acp3x_base + mmACP_I2STDM_ITER) & BIT(0)) &&
+		     !(rv_readl(rtd->acp3x_base + mmACP_I2STDM_IRER) & BIT(0)))
+			rv_writel(0, rtd->acp3x_base + mmACP_I2STDM_IER);
 		ret = 0;
 		break;
 	default:
-- 
2.16.4