linux-kernel - Re: [PATCH] ASoC: mediatek: mt6358: support DMIC one-wire mode

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Message-ID: <20200529130539.GK4610@sirena.org.uk>
Date:   Fri, 29 May 2020 14:05:40 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Tzung-Bi Shih <tzungbi@...gle.com>
Cc:     Jiaxin Yu <jiaxin.yu@...iatek.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Takashi Iwai <tiwai@...e.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Hariprasad Kelam <hariprasad.kelam@...il.com>,
        ALSA development <alsa-devel@...a-project.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        howie.huang@...iatek.com
Subject: Re: [PATCH] ASoC: mediatek: mt6358: support DMIC one-wire mode

On Fri, May 29, 2020 at 07:22:43PM +0800, Tzung-Bi Shih wrote:
> On Fri, May 29, 2020 at 7:09 PM Mark Brown <broonie@...nel.org> wrote:

> > What is DMIC one wire mode?  This doesn't sound like something I'd
> > expect to vary at runtime.

> It means: 1 PDM data wire carries 2 channel data (rising edge for left
> and falling edge for right).

I thought that was normal for DMICs - is this selecting between left and
right or something?

> The setting shouldn't and won't change at runtime.  Would you suggest
> putting it into DTS binding?

Yes.

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