linux-kernel - Re: [PATCH 1/6] arm64: dts: imx8mn-beacon: Enable Digitial Microphone

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Date:   Tue, 19 Jul 2022 14:17:58 -0500
From:   Adam Ford <aford173@...il.com>
To:     Ahmad Fatoum <a.fatoum@...gutronix.de>
Cc:     arm-soc <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        Fabio Estevam <festevam@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Will Deacon <will@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Shawn Guo <shawnguo@...nel.org>
Subject: Re: [PATCH 1/6] arm64: dts: imx8mn-beacon: Enable Digitial Microphone

On Tue, Jul 19, 2022 at 12:57 AM Ahmad Fatoum <a.fatoum@...gutronix.de> wrote:
>
> Hello Adam,
>
> On 17.07.22 20:09, Adam Ford wrote:
> > +
> > +     sound-micfil {
> > +             compatible = "fsl,imx-audio-card";
> > +             model = "imx-audio-micfil";
> > +             pri-dai-link {
> > +                     link-name = "micfil hifi";
> > +                     format = "i2s";
>
> Given that MICFIL and mic speak PDM with each other,
> is i2s the correct format here?

I was basing this off some references from some NXP stuff in their
downstream kernel.  I know the audio I record with the PDM microphone
worked and sounded like I expected when I tested it.

adam

>
> Cheers,
> Ahmad
>
> --
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