From: Yong Zhi yong.zhi@intel.com
[ Upstream commit 1a446873d7dd3a450f685928ce7f1907bde4583d ]
During S3 test, the following error was observed:
[ 726.174237] i2c_designware i2c_designware.0: platform_pm_resume+0x0/0x3d returned 0 after 0 usecs [ 726.184187] max98373 i2c-MX98373:00: calling max98373_resume+0x0/0x30 [snd_soc_max98373] @ 12698, parent: i2c-11 [ 726.195589] max98373 i2c-MX98373:00: Reset command failed. (ret:-16)
When calling regmap_update_bits(), since map->reg_update_bits is NULL, _regmap_read() is entered with the following logic:
if (!map->cache_bypass) { ret = regcache_read(map, reg, val); if (ret == 0) return 0; }
if (map->cache_only) return -EBUSY;
regcache_read() hits -EINVAL because MAX98373_R2000_SW_RESET is volatile, as map->cache_only is set by codec suspend, thus -EBUSY is returned. Fix by moving max98373_reset() after cache_only set to false in max98373_resume().
Signed-off-by: Yong Zhi yong.zhi@intel.com Link: https://lore.kernel.org/r/1588376661-29799-1-git-send-email-yong.zhi@intel.c... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/codecs/max98373.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/codecs/max98373.c b/sound/soc/codecs/max98373.c index cae1def8902d..96718e3a1ad0 100644 --- a/sound/soc/codecs/max98373.c +++ b/sound/soc/codecs/max98373.c @@ -850,8 +850,8 @@ static int max98373_resume(struct device *dev) { struct max98373_priv *max98373 = dev_get_drvdata(dev);
- max98373_reset(max98373, dev); regcache_cache_only(max98373->regmap, false); + max98373_reset(max98373, dev); regcache_sync(max98373->regmap); return 0; }