[PATCH 4/7] ASoC: stm32: i2s: fix dma configuration

[Olivier Moysan]

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

Signed-off-by: Olivier Moysan <olivier.moy...@st.com>
---
 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) {
-- 
2.7.4