[alsa-devel] [PATCH] ASoC: amd: Fix simultaneous playback and capture

[Akshu Agrawal]

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 at amd.com>
---
 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 8619ed5f08ef..c40422fe0001 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:
-- 
2.21.0