openwrt/target/linux/layerscape/patches-5.4/801-audio-0013-MLK-10611-1-ASoC-fsl-sai-Just-one-device-can-playbac.patch

From 0ab3461b68ccc1d4ffb37dbc7f2e57adc8aed0fb Mon Sep 17 00:00:00 2001
From: Zidan Wang <zidan.wang@freescale.com>
Date: Fri, 10 Apr 2015 09:52:36 +0800
Subject: [PATCH] MLK-10611-1 ASoC: fsl-sai: Just one device can
 playback(captrue) when using the same SAI

Just one device can playback(captrue) when using the same SAI.

Signed-off-by: Zidan Wang <zidan.wang@freescale.com>
(cherry picked from commit 7981a488c4da440db21f0544b519b44636a0cabb)
---
 sound/soc/fsl/fsl_sai.c | 10 ++++++++++
 sound/soc/fsl/fsl_sai.h |  1 +
 2 files changed, 11 insertions(+)

--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -605,6 +605,11 @@ static int fsl_sai_startup(struct snd_pc
 	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 	int ret;
 
+	if (sai->is_stream_opened[tx])
+		return -EBUSY;
+	else
+		sai->is_stream_opened[tx] = true;
+
 	regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx), FSL_SAI_CR3_TRCE,
 			   FSL_SAI_CR3_TRCE);
 
@@ -621,6 +626,11 @@ static void fsl_sai_shutdown(struct snd_
 	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
 
 	regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx), FSL_SAI_CR3_TRCE, 0);
+
+	if (sai->is_stream_opened[tx]) {
+		regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx), FSL_SAI_CR3_TRCE, 0);
+		sai->is_stream_opened[tx] = false;
+	}
 }
 
 static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = {
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -137,6 +137,7 @@ struct fsl_sai {
 	bool is_dsp_mode;
 	bool sai_on_imx;
 	bool synchronous[2];
+	bool is_stream_opened[2];
 
 	unsigned int mclk_id[2];
 	unsigned int mclk_streams;