1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/801-audio-0026-MLK-14935-ASoC-fsl_sai-Fix-mixing-initialization-dat.patch b/target/linux/layerscape/patches-5.4/801-audio-0026-MLK-14935-ASoC-fsl_sai-Fix-mixing-initialization-dat.patch
new file mode 100644
index 0000000000..a68985fa02
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/801-audio-0026-MLK-14935-ASoC-fsl_sai-Fix-mixing-initialization-dat.patch
@@ -0,0 +1,36 @@
+From 96412158397ca0e41db1eb7cec4f51a2280d1bf1 Mon Sep 17 00:00:00 2001
+From: Mihai Serban <mihai.serban@nxp.com>
+Date: Thu, 27 Apr 2017 18:47:42 +0300
+Subject: [PATCH] MLK-14935: ASoC: fsl_sai: Fix mixing initialization data with
+ actual audio samples
+
+When starting a playback the initialization data used to reduce underruns
+was send to the transmit data register after the DMA requests were enabled.
+This patch moves the initialization phase before enabling the DMA so the
+data is transmitted in correct order.
+
+Signed-off-by: Mihai Serban <mihai.serban@nxp.com>
+---
+ sound/soc/fsl/fsl_sai.c | 5 ++---
+ 1 file changed, 2 insertions(+), 3 deletions(-)
+
+--- a/sound/soc/fsl/fsl_sai.c
++++ b/sound/soc/fsl/fsl_sai.c
+@@ -594,15 +594,14 @@ static int fsl_sai_trigger(struct snd_pc
+ 	case SNDRV_PCM_TRIGGER_START:
+ 	case SNDRV_PCM_TRIGGER_RESUME:
+ 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+-		regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
+-				   FSL_SAI_CSR_FRDE, FSL_SAI_CSR_FRDE);
+-
+ 		for (i = 0; tx && i < channels; i++)
+ 			regmap_write(sai->regmap, FSL_SAI_TDR0, 0x0);
+ 		if (tx)
+ 			udelay(10);
+ 
+ 		regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
++				   FSL_SAI_CSR_FRDE, FSL_SAI_CSR_FRDE);
++		regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
+ 				   FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE);
+ 		regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
+ 				   FSL_SAI_CSR_SE, FSL_SAI_CSR_SE);