[PATCH] ASoC: fsl_spdif: Disable TX clock when stop

[Shengjiu Wang]

The TX clock source may be changed in next case, need to
disable it when stop, otherwise the TX may not work after
changing the clock source, error log is:

aplay: pcm_write:2058: write error: Input/output error

Fixes: a2388a498ad2 ("ASoC: fsl: Add S/PDIF CPU DAI driver")
Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.com>
---
 sound/soc/fsl/fsl_spdif.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index 57c41b2f7d17..5f15dae16dd3 100644
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -610,6 +610,8 @@ static void fsl_spdif_shutdown(struct snd_pcm_substream *substream,
 		mask = SCR_TXFIFO_AUTOSYNC_MASK | SCR_TXFIFO_CTRL_MASK |
 			SCR_TXSEL_MASK | SCR_USRC_SEL_MASK |
 			SCR_TXFIFO_FSEL_MASK;
+		/* Disable TX clock */
+		regmap_update_bits(regmap, REG_SPDIF_STC, STC_TXCLK_ALL_EN_MASK, 0);
 	} else {
 		scr = SCR_RXFIFO_OFF | SCR_RXFIFO_CTL_ZERO;
 		mask = SCR_RXFIFO_FSEL_MASK | SCR_RXFIFO_AUTOSYNC_MASK|
-- 
2.17.1