linux-kernel - Re: [PATCH v4 2/2] arm64: dts: qcom: sc7180-trogdor: Add lpass dai link for HDMI

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Date:   Wed, 11 Aug 2021 15:10:09 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Srinivasa Rao Mandadapu <srivasam@....qualcomm.com>,
        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>,
        V Sujith Kumar Reddy <vsujithk@...eaurora.org>
Subject: Re: [PATCH v4 2/2] arm64: dts: qcom: sc7180-trogdor: Add lpass dai
 link for HDMI

Hi,

On Tue, Aug 10, 2021 at 11:06 PM Stephen Boyd <swboyd@...omium.org> wrote:
>
> Quoting Srinivasa Rao Mandadapu (2021-07-21 01:05:49)
> > diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
> > index 31bf7c698b8f..a4cb9ee567ff 100644
> > --- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
> > @@ -288,6 +288,7 @@ sound: sound {
> >                         "Headphone Jack", "HPOL",
> >                         "Headphone Jack", "HPOR";
> >
> > +               #sound-dai-cells = <0>;
> >                 #address-cells = <1>;
> >                 #size-cells = <0>;
> >
> > @@ -314,6 +315,18 @@ sound_multimedia1_codec: codec {
> >                                 sound-dai = <&max98357a>;
> >                         };
> >                 };
> > +
> > +               dai-link@2 {
> > +                       link-name = "MultiMedia2";
> > +                       reg = <2>;
>
> Should this be
>
>                         reg = <LPASS_DP_RX>;
>
> ? And then the dai-link@2 should change to dai-link@5? It doesn't seem
> to really matter though, so maybe not.
>
> > +                       cpu {
> > +                               sound-dai = <&lpass_cpu 2>;
>
> This should be
>
>                                 sound-dai = <&lpass_cpu LPASS_DP_RX>;
>
> ? At least from what I can tell without having it be 5 it doesn't work
> properly and external audio over DP doesn't enumerate.

I swear I provided feedback just like that. Yeah, here:

https://lore.kernel.org/r/CAD=FV=W3X8W90vPdrDAymzTKj-J7QPyn4ukaLSOhEkCme3+r_Q@mail.gmail.com

I think the problem is that the wrong patch landed. The one I see that
landed last week was v4 but I also see v7 of the same patch:

https://lore.kernel.org/r/20210726120910.20335-3-srivasam@codeaurora.org/