Re: [PATCH AUTOSEL 5.3 087/203] ASoC: mediatek: mt6358: add delay after dmic clock on

[Sasha Levin]

On Mon, Sep 23, 2019 at 11:21:59AM -0700, Mark Brown wrote:
> On Sun, Sep 22, 2019 at 02:41:53PM -0400, Sasha Levin wrote:
> > From: Jiaxin Yu <jiaxin.yu@xxxxxxxxxxxx>
> >
> > [ Upstream commit ccb1fa21ef58a2ac15519bb878470762e967e8b3 ]
> >
> > Most dmics produce a high level when they receive clock. The difference
> > between power-on and memory record time is about 10ms, but the dmic
> > needs 50ms to output normal data.
> >
> > This commit add 100ms delay after SoC output clock so that we can cut
> > off the pop noise at the beginning.
>
> This might mess up a production system, please don't backport it.
> In general delays to eliminate pops and clicks that are part of
> the PCM statup path (as opposed to DAPM) are not safe to
> backport.

Okay, I'll drop it, thanks.

--
Thanks,
Sasha