linux-kernel - Re: [PATCH] arm64: dts: qcom: Add wakeup delay for adau codec

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Message-ID: <CAD=FV=Uzg+a6ZrinAnq_=29103JPs0=oWTa3VkfTUbPRkvGyjw@mail.gmail.com>
Date:   Thu, 20 May 2021 14:40:13 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, Judy Hsiao <judyhsiao@...omium.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Rohit kumar <rohitkr@...eaurora.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: Re: [PATCH] arm64: dts: qcom: Add wakeup delay for adau codec

Hi,


On Mon, May 17, 2021 at 3:44 PM Stephen Boyd <swboyd@...omium.org> wrote:
>
> Quoting Srinivasa Rao Mandadapu (2021-05-13 05:24:29)
> > Add wakeup delay for fixing PoP noise during capture begin.
> >
> > Signed-off-by: Judy Hsiao <judyhsiao@...omium.org>
> > Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
> > ---
> >  arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi
> > index 4c6e433c8226..3eb8550da1fc 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor-coachz.dtsi
> > @@ -23,6 +23,7 @@ / {
> >         adau7002: audio-codec-1 {
> >                 compatible = "adi,adau7002";
> >                 IOVDD-supply = <&pp1800_l15a>;
> > +               wakeup-delay-ms = <15>;
>
> Is this part of the binding?

It doesn't seem to be, but it's supported by the code. It's also in
the generic "dmic" bindings. The bindings are pre-yaml. Seems like
someone needs to take charge and clean those up, but I'm not sure we
need to block this patch on it?

Though I'm not an expert on audio stuff, assuming that this works OK
I'm fine with:

Reviewed-by: Douglas Anderson <dianders@...omium.org>

-Doug