From mboxrd@z Thu Jan  1 00:00:00 1970
From: KaiChieh Chuang <kaichieh.chuang@mediatek.com>
Subject: Re: [PATCH v2 1/5] ASoC: add mt6351 codec driver
Date: Fri, 20 Apr 2018 14:54:02 +0800
Message-ID: <1524207242.3290.19.camel@mtksdaap41>
References: <20180416003252.4177-1-kaichieh.chuang@mediatek.com>
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 <20180419144139.GG27188@sirena.org.uk>
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> > the regmap is obtain from parent dev, i assume i can use
> > snd_soc_component_init_regmap() as alternative for
> > get_regmap().callback?
> 
> Yes, though you shouldn't even need to do that - the core should just
> try using the parent regmap if none is provided.

>>From my experiment, the register cannot be controlled without calling
snd_soc_component_init_regmap(). ASoC didn't seems to get the parent's
regmap directly, also from code tracing.