linux-kernel - Re: [PATCH v3 2/9] ASoC: rockchip: Remove obsolete dmic-delay

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Message-ID: <20170818115223.pyfqji5jkplt6isx@sirena.org.uk>
Date:   Fri, 18 Aug 2017 12:52:23 +0100
From:   Mark Brown <broonie@...nel.org>
To:     jeffy <jeffy.chen@...k-chips.com>
Cc:     linux-kernel@...r.kernel.org, dgreid@...omium.org, heiko@...ech.de,
        briannorris@...omium.org, mka@...omium.org, dianders@...omium.org,
        Jaroslav Kysela <perex@...ex.cz>, devicetree@...r.kernel.org,
        alsa-devel@...a-project.org, linux-rockchip@...ts.infradead.org,
        Liam Girdwood <lgirdwood@...il.com>,
        Takashi Iwai <tiwai@...e.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 2/9] ASoC: rockchip: Remove obsolete dmic-delay

On Fri, Aug 18, 2017 at 09:41:54AM +0800, jeffy wrote:
> On 08/18/2017 01:11 AM, Mark Brown wrote:
> > On Thu, Aug 17, 2017 at 12:44:10PM +0800, Jeffy Chen wrote:

> > > -Optional properties:
> > > -- dmic-wakeup-delay-ms : specify delay time (ms) for DMIC ready.
> > > -  If this option is specified, which means it's required dmic need
> > > -  delay for DMIC to ready so that rt5514 can avoid recording before
> > > -  DMIC send valid data

> > Why would nobody ever want to use this in future?

> hmmm, check again, rt5514 fixed this issue in there driver instead in:
> a5461fd6c8f7 ASoC: rt5514: Add the DMIC initial delay to wait it ready.

> so we don't need this...

You don't need it on your board for new DTs but why is it not possible
that another board might need it?

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