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Commit 261613ef authored by Mark Brown's avatar Mark Brown Committed by Greg Kroah-Hartman
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ASoC: tlv320aic31xx: Fix jack detection after suspend

commit 2c39ca68

 upstream.

The tlv320aic31xx driver relies on regcache_sync() to restore the register
contents after going to _BIAS_OFF, for example during system suspend. This
does not work for the jack detection configuration since that is configured
via the same register that status is read back from so the register is
volatile and not cached. This can also cause issues during init if the jack
detection ends up getting set up before the CODEC is initially brought out
of _BIAS_OFF, we will reset the CODEC and resync the cache as part of that
process.

Fix this by explicitly reapplying the jack detection configuration after
resyncing the register cache during power on.

This issue was found by an engineer working off-list on a product
kernel, I just wrote up the upstream fix.

Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210723180200.25105-1-broonie@kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7e5a7fa6
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