linux-kernel - Re: [PATCH v5 1/2] arm64: dts: qcom: sc7180-trogdor: Add lpass dai link for I2S driver

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Date:   Fri, 12 Mar 2021 13:28:11 -0800
From:   Doug Anderson <dianders@...omium.org>
To:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        Rohit kumar <rohitkr@...eaurora.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Judy Hsiao <judyhsiao@...omium.org>,
        Ajit Pandey <ajitp@...eaurora.org>,
        V Sujith Kumar Reddy <vsujithk@...eaurora.org>
Subject: Re: [PATCH v5 1/2] arm64: dts: qcom: sc7180-trogdor: Add lpass dai
 link for I2S driver

Hi,

On Fri, Mar 12, 2021 at 8:06 AM Srinivasa Rao Mandadapu
<srivasam@...eaurora.org> wrote:
>
> +               dai-link@0 {
> +                       link-name = "MultiMedia0";
> +                       reg = <MI2S_PRIMARY>;
> +                       cpu {
> +                               sound-dai = <&lpass_cpu MI2S_PRIMARY>;
> +                       };
> +
> +                       multimedia0_codec: codec {
> +                               sound-dai = <&alc5682 MI2S_PRIMARY>;

Please change "MI2S_PRIMARY" to "0". "MI2S_PRIMARY" is a numbering
system for "lpass_cpu" not for "alc5682". I'm not aware of symbolic
names for the alc5682's DAIs.

>From digging through the code and testing, it appears that for alc5682:
0 - aif1
1 - aif2

Thus you could be a little more documenting by doing:

sound-dai = <&alc5682 0 /*aif1*/>;

-Doug