ASoC: fsl_spdif: Disable TX clock when stop

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@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/1646879863-27711-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index e0acce6..b502e7c 100644 (file)
--- 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|