[alsa-devel] Applied "ASoC: stm32: i2s: fix dma configuration" to the asoc tree

Mark Brown broonie at kernel.org
Tue Feb 26 17:22:29 CET 2019


The patch

   ASoC: stm32: i2s: fix dma configuration

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

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and review of the tree, please engage with people reporting problems and
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If any updates are required or you are submitting further changes they
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Thanks,
Mark

>From 1ac2bd16448997d9ec01922423486e1e85535eda Mon Sep 17 00:00:00 2001
From: Olivier Moysan <olivier.moysan at st.com>
Date: Tue, 26 Feb 2019 14:51:07 +0100
Subject: [PATCH] ASoC: stm32: i2s: fix dma configuration

DMA configuration is not balanced on start/stop.
Move DMA configuration to trigger callback.

Signed-off-by: Olivier Moysan <olivier.moysan at st.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/stm/stm32_i2s.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/sound/soc/stm/stm32_i2s.c b/sound/soc/stm/stm32_i2s.c
index 7f56d7b51ba3..95fffb61faa5 100644
--- a/sound/soc/stm/stm32_i2s.c
+++ b/sound/soc/stm/stm32_i2s.c
@@ -488,7 +488,7 @@ static int stm32_i2s_configure(struct snd_soc_dai *cpu_dai,
 {
 	struct stm32_i2s_data *i2s = snd_soc_dai_get_drvdata(cpu_dai);
 	int format = params_width(params);
-	u32 cfgr, cfgr_mask, cfg1, cfg1_mask;
+	u32 cfgr, cfgr_mask, cfg1;
 	unsigned int fthlv;
 	int ret;
 
@@ -529,15 +529,11 @@ static int stm32_i2s_configure(struct snd_soc_dai *cpu_dai,
 	if (ret < 0)
 		return ret;
 
-	cfg1 = I2S_CFG1_RXDMAEN | I2S_CFG1_TXDMAEN;
-	cfg1_mask = cfg1;
-
 	fthlv = STM32_I2S_FIFO_SIZE * I2S_FIFO_TH_ONE_QUARTER / 4;
-	cfg1 |= I2S_CFG1_FTHVL_SET(fthlv - 1);
-	cfg1_mask |= I2S_CFG1_FTHVL_MASK;
+	cfg1 = I2S_CFG1_FTHVL_SET(fthlv - 1);
 
 	return regmap_update_bits(i2s->regmap, STM32_I2S_CFG1_REG,
-				  cfg1_mask, cfg1);
+				  I2S_CFG1_FTHVL_MASK, cfg1);
 }
 
 static int stm32_i2s_startup(struct snd_pcm_substream *substream,
@@ -592,6 +588,10 @@ static int stm32_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 		/* Enable i2s */
 		dev_dbg(cpu_dai->dev, "start I2S\n");
 
+		cfg1_mask = I2S_CFG1_RXDMAEN | I2S_CFG1_TXDMAEN;
+		regmap_update_bits(i2s->regmap, STM32_I2S_CFG1_REG,
+				   cfg1_mask, cfg1_mask);
+
 		ret = regmap_update_bits(i2s->regmap, STM32_I2S_CR1_REG,
 					 I2S_CR1_SPE, I2S_CR1_SPE);
 		if (ret < 0) {
-- 
2.20.1



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