1 files changed, 76 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/801-audio-0001-Revert-ASoC-fsl_sai-Fix-noise-when-using-EDMA.patch b/target/linux/layerscape/patches-5.4/801-audio-0001-Revert-ASoC-fsl_sai-Fix-noise-when-using-EDMA.patch
new file mode 100644
index 0000000000..e88d0fb39f
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/801-audio-0001-Revert-ASoC-fsl_sai-Fix-noise-when-using-EDMA.patch
@@ -0,0 +1,76 @@
+From cf07127ea019b78f7ea5e009d494e2bd0bd475fa Mon Sep 17 00:00:00 2001
+From: Leonard Crestez <leonard.crestez@nxp.com>
+Date: Thu, 3 Oct 2019 20:44:56 +0300
+Subject: [PATCH] Revert "ASoC: fsl_sai: Fix noise when using EDMA"
+
+This reverts commit e75f4940e8ad0dd76527302a10c06b58bf7eb590.
+---
+ sound/soc/fsl/fsl_sai.c | 15 ---------------
+ sound/soc/fsl/fsl_sai.h |  1 -
+ 2 files changed, 16 deletions(-)
+
+--- a/sound/soc/fsl/fsl_sai.c
++++ b/sound/soc/fsl/fsl_sai.c
+@@ -628,16 +628,6 @@ static int fsl_sai_startup(struct snd_pc
+ 			   FSL_SAI_CR3_TRCE_MASK,
+ 			   FSL_SAI_CR3_TRCE);
+ 
+-	/*
+-	 * EDMA controller needs period size to be a multiple of
+-	 * tx/rx maxburst
+-	 */
+-	if (sai->soc_data->use_edma)
+-		snd_pcm_hw_constraint_step(substream->runtime, 0,
+-					   SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
+-					   tx ? sai->dma_params_tx.maxburst :
+-					   sai->dma_params_rx.maxburst);
+-
+ 	ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
+ 			SNDRV_PCM_HW_PARAM_RATE, &fsl_sai_rate_constraints);
+ 
+@@ -1048,35 +1038,30 @@ static int fsl_sai_remove(struct platfor
+ 
+ static const struct fsl_sai_soc_data fsl_sai_vf610_data = {
+ 	.use_imx_pcm = false,
+-	.use_edma = false,
+ 	.fifo_depth = 32,
+ 	.reg_offset = 0,
+ };
+ 
+ static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = {
+ 	.use_imx_pcm = true,
+-	.use_edma = false,
+ 	.fifo_depth = 32,
+ 	.reg_offset = 0,
+ };
+ 
+ static const struct fsl_sai_soc_data fsl_sai_imx7ulp_data = {
+ 	.use_imx_pcm = true,
+-	.use_edma = false,
+ 	.fifo_depth = 16,
+ 	.reg_offset = 8,
+ };
+ 
+ static const struct fsl_sai_soc_data fsl_sai_imx8mq_data = {
+ 	.use_imx_pcm = true,
+-	.use_edma = false,
+ 	.fifo_depth = 128,
+ 	.reg_offset = 8,
+ };
+ 
+ static const struct fsl_sai_soc_data fsl_sai_imx8qm_data = {
+ 	.use_imx_pcm = true,
+-	.use_edma = true,
+ 	.fifo_depth = 64,
+ 	.reg_offset = 0,
+ };
+--- a/sound/soc/fsl/fsl_sai.h
++++ b/sound/soc/fsl/fsl_sai.h
+@@ -157,7 +157,6 @@
+ 
+ struct fsl_sai_soc_data {
+ 	bool use_imx_pcm;
+-	bool use_edma;
+ 	unsigned int fifo_depth;
+ 	unsigned int reg_offset;
+ };