From c0372bc873dd29f325ee908351e0bd5b08d4d608 Mon Sep 17 00:00:00 2001
From: Bard Liao <yung-chuan.liao@linux.intel.com>
Date: Mon, 7 Jun 2021 17:22:37 -0500
Subject: [PATCH] ASoC: rt5682-sdw: set regcache_cache_only false before reading RT5682_DEVICE_ID
Git-commit: c0372bc873dd29f325ee908351e0bd5b08d4d608
Patch-mainline: v5.14-rc1
References: git-fixes

RT5682_DEVICE_ID is a volatile register, we can not read it in cache
only mode.

Fixes: 03f6fc6de919 ("ASoC: rt5682: Add the soundwire support")
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210607222239.582139-14-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/codecs/rt5682-sdw.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/sound/soc/codecs/rt5682-sdw.c
+++ b/sound/soc/codecs/rt5682-sdw.c
@@ -400,6 +400,11 @@ static int rt5682_io_init(struct device
 
 	pm_runtime_get_noresume(&slave->dev);
 
+	if (rt5682->first_hw_init) {
+		regcache_cache_only(rt5682->regmap, false);
+		regcache_cache_bypass(rt5682->regmap, true);
+	}
+
 	while (loop > 0) {
 		regmap_read(rt5682->regmap, RT5682_DEVICE_ID, &val);
 		if (val == DEVICE_ID)
@@ -415,11 +420,6 @@ static int rt5682_io_init(struct device
 		goto err_nodev;
 	}
 
-	if (rt5682->first_hw_init) {
-		regcache_cache_only(rt5682->regmap, false);
-		regcache_cache_bypass(rt5682->regmap, true);
-	}
-
 	rt5682_calibrate(rt5682);
 
 	if (rt5682->first_hw_init) {