[alsa-devel] [PATCH] ASoC: si476x: Remove custom register I/O implementation

Andrey Smirnov andrew.smirnov at gmail.com
Sat Sep 28 06:37:01 CEST 2013

> Since the driver doesn't expose any controls to userspace the only
> things that can cause register writes are the operations provided by the
> CODEC driver, they could take the lock for their runtime (which is about
> the level the v4l stuff is running at AIUI).

Do you mean moving it to si476x_codec_set_dai_fmt and
si476x_codec_hw_params? If those are the only two places where
register read and write are called by SoC sound subsystem then I think
that would work.

> This still won't fix the issue with the device being powered off but I
> guess that normal usage patterns will have powered the device up to do
> tuning or something prior to audio being started

You mean the issue cause by my forgetting to sync cache on power up?
That would be a subject for a separate patch.

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