ASoC: amd: Fix simultaneous playback and capture

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.comSigned-off-by: Mark Brown <broonie@kernel.org>

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: