ASoC: fsl_spdif: Fix unexpected interrupt after suspend

stable inclusion
from stable-5.10.50
commit f3bf888507f0e7f6daf39e3cf0cefa2edf963778
bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f3bf888507f0e7f6daf39e3cf0cefa2edf963778

--------------------------------

[ Upstream commit a7a0a2fe ]

When system enter suspend, the machine driver suspend callback
function will be called, then the cpu driver trigger callback
(SNDRV_PCM_TRIGGER_SUSPEND) be called, it would disable the
interrupt.

But the machine driver suspend and cpu dai driver suspend order
maybe changed, the cpu dai driver's suspend callback is called before
machine driver's suppend callback, then the interrupt is not cleared
successfully in trigger callback.

So need to clear interrupts in cpu dai driver's suspend callback
to avoid such issue.

Fixes: 9cb2b379 ("ASoC: fsl_spdif: Add pm runtime function")
Signed-off-by: NShengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: NFabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/1624365084-7934-1-git-send-email-shengjiu.wang@nxp.comSigned-off-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

sound/soc/fsl/fsl_spdif.c

@@ -1387,6 +1387,9 @@ static int fsl_spdif_runtime_suspend(struct device *dev)
 	struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
 	int i;
 
+	/* Disable all the interrupts */
+	regmap_update_bits(spdif_priv->regmap, REG_SPDIF_SIE, 0xffffff, 0);
+
 	regmap_read(spdif_priv->regmap, REG_SPDIF_SRPC,
 			&spdif_priv->regcache_srpc);
 	regcache_cache_only(spdif_priv->regmap, true);