ASoC: renesas: msiof: setup both (Playback/Capture) in the same time

SITMDRn / SIRMDRn and some other registers should not be updated during
working even though it was not related the target direction (for example,
do TX settings during RX is working), otherwise it cause a FSERR.

Setup both direction (Playback/Capture) in the same time.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Link: https://patch.msgid.link/877bxnyutt.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: morimoto

sound/soc/renesas/rcar/msiof.c

@@ -36,6 +36,16 @@
  * We need to use SW reset (= reset_control_xxx()) instead of TXRST/RXRST.
  */
 
+/*
+ * [NOTE-BOTH-SETTING]
+ *
+ * SITMDRn / SIRMDRn and some other registers should not be updated during working even though it
+ * was not related the target direction (for example, do TX settings during RX is working),
+ * otherwise it cause a FSERR.
+ *
+ * Setup both direction (Playback/Capture) in the same time.
+ */
+
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_dma.h>
@@ -165,39 +175,40 @@ static int msiof_hw_start(struct snd_soc_component *component,
 	/* Start DMAC */
 	snd_dmaengine_pcm_trigger(substream, cmd);
 
+	/*
+	 * setup both direction (Playback/Capture) in the same time.
+	 * see
+	 *	above [NOTE-BOTH-SETTING]
+	 */
+
 	/* SITMDRx */
-	if (is_play) {
-		val = SITMDR1_PCON |
-		      FIELD_PREP(SIMDR1_SYNCMD, SIMDR1_SYNCMD_LR) |
-		      SIMDR1_SYNCAC | SIMDR1_XXSTP;
-		if (msiof_flag_has(priv, MSIOF_FLAGS_NEED_DELAY))
-			val |= FIELD_PREP(SIMDR1_DTDL, 1);
-
-		msiof_write(priv, SITMDR1, val);
-
-		val = FIELD_PREP(SIMDR2_BITLEN1, width - 1);
-		msiof_write(priv, SITMDR2, val | FIELD_PREP(SIMDR2_GRP, 1));
-		msiof_write(priv, SITMDR3, val);
-	}
+	val = SITMDR1_PCON | SIMDR1_SYNCAC | SIMDR1_XXSTP |
+		FIELD_PREP(SIMDR1_SYNCMD, SIMDR1_SYNCMD_LR);
+	if (msiof_flag_has(priv, MSIOF_FLAGS_NEED_DELAY))
+		val |= FIELD_PREP(SIMDR1_DTDL, 1);
+
+	msiof_write(priv, SITMDR1, val);
+
+	val = FIELD_PREP(SIMDR2_BITLEN1, width - 1);
+	msiof_write(priv, SITMDR2, val | FIELD_PREP(SIMDR2_GRP, 1));
+	msiof_write(priv, SITMDR3, val);
+
 	/* SIRMDRx */
-	else {
-		val = FIELD_PREP(SIMDR1_SYNCMD, SIMDR1_SYNCMD_LR) |
-		      SIMDR1_SYNCAC;
-		if (msiof_flag_has(priv, MSIOF_FLAGS_NEED_DELAY))
-			val |= FIELD_PREP(SIMDR1_DTDL, 1);
+	val = SIMDR1_SYNCAC |
+		FIELD_PREP(SIMDR1_SYNCMD, SIMDR1_SYNCMD_LR);
+	if (msiof_flag_has(priv, MSIOF_FLAGS_NEED_DELAY))
+		val |= FIELD_PREP(SIMDR1_DTDL, 1);
 
-		msiof_write(priv, SIRMDR1, val);
+	msiof_write(priv, SIRMDR1, val);
 
-		val = FIELD_PREP(SIMDR2_BITLEN1, width - 1);
-		msiof_write(priv, SIRMDR2, val | FIELD_PREP(SIMDR2_GRP, 1));
-		msiof_write(priv, SIRMDR3, val);
-	}
+	val = FIELD_PREP(SIMDR2_BITLEN1, width - 1);
+	msiof_write(priv, SIRMDR2, val | FIELD_PREP(SIMDR2_GRP, 1));
+	msiof_write(priv, SIRMDR3, val);
 
 	/* SIFCTR */
-	if (is_play)
-		msiof_update(priv, SIFCTR, SIFCTR_TFWM, FIELD_PREP(SIFCTR_TFWM, SIFCTR_TFWM_1));
-	else
-		msiof_update(priv, SIFCTR, SIFCTR_RFWM, FIELD_PREP(SIFCTR_RFWM, SIFCTR_RFWM_1));
+	msiof_write(priv, SIFCTR,
+		    FIELD_PREP(SIFCTR_TFWM, SIFCTR_TFWM_1) |
+		    FIELD_PREP(SIFCTR_RFWM, SIFCTR_RFWM_1));
 
 	/* SIIER */
 	if (is_play)
@@ -214,10 +225,11 @@ static int msiof_hw_start(struct snd_soc_component *component,
 	msiof_update(priv, SISTR, val, val);
 
 	/* SICTR */
+	val = SICTR_TEDG | SICTR_REDG;
 	if (is_play)
-		val = SICTR_TXE | SICTR_TEDG;
+		val |= SICTR_TXE;
 	else
-		val = SICTR_RXE | SICTR_REDG;
+		val |= SICTR_RXE;
 	msiof_update_and_wait(priv, SICTR, val, val, val);
 
 	return 0;