From b776c4a4618ec1b5219d494c423dc142f23c4e8f Mon Sep 17 00:00:00 2001
From: Shengjiu Wang <shengjiu.wang@nxp.com>
Date: Sat, 7 May 2022 20:14:14 +0800
Subject: [PATCH] ASoC: fsl_micfil: explicitly clear CHnF flags
Git-commit: b776c4a4618ec1b5219d494c423dc142f23c4e8f
Patch-mainline: v6.1-rc8
References: git-fixes
There may be failure when start 1 channel recording after
8 channels recording. The reason is that the CHnF
flags are not cleared successfully by software reset.
This issue is triggerred by the change of clearing
software reset bit.
CHnF flags are write 1 clear bits. Clear them by force
write.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1651925654-32060-2-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
sound/soc/fsl/fsl_micfil.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/sound/soc/fsl/fsl_micfil.c b/sound/soc/fsl/fsl_micfil.c
index cb84d95c3aac..d1cd104f8584 100644
--- a/sound/soc/fsl/fsl_micfil.c
+++ b/sound/soc/fsl/fsl_micfil.c
@@ -202,6 +202,14 @@ static int fsl_micfil_reset(struct device *dev)
if (ret)
return ret;
+ /*
+ * Set SRES should clear CHnF flags, But even add delay here
+ * the CHnF may not be cleared sometimes, so clear CHnF explicitly.
+ */
+ ret = regmap_write_bits(micfil->regmap, REG_MICFIL_STAT, 0xFF, 0xFF);
+ if (ret)
+ return ret;
+
return 0;
}
--
2.35.3