linux-kernel - Re: [PATCH v4] arm64: dts: qcom: sc7280: Fix Dmic no sound on villager-r1

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Date:   Fri, 26 Aug 2022 13:08:44 -0500
From:   Stephen Boyd <swboyd@...omium.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Judy Hsiao <judyhsiao@...omium.org>
Cc:     Andy Gross <agross@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Srini Kandagatla <srinivas.kandagatla@...aro.org>,
        dianders@...omium.org, mka@...omium.org, cychiang@...gle.com,
        judyhsiao@...gle.com, linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
Subject: Re: [PATCH v4] arm64: dts: qcom: sc7280: Fix Dmic no sound on villager-r1

Quoting Judy Hsiao (2022-08-25 23:56:21)
> Fix the DMIC no sound issue of villager-r1 by using "PP1800_L2C" as the
> DMIC power source to match the hardware schematic.
>
> This patch:
>    1. set vdd-micb-supply to PP1800_L2C as the MIC Bias voltage regulator.
>    2. In audio-routing, set VA DMIC01~VA DMIC03 to use the vdd-micb-supply
>       setting.
>
> Co-developed-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
> Signed-off-by: Judy Hsiao <judyhsiao@...omium.org>

Reviewed-by: Stephen Boyd <swboyd@...omium.org>

> diff --git a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r1.dts b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r1.dts
> index c03b3ae4de50..fd202a8f6a33 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r1.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-herobrine-villager-r1.dts
> @@ -12,3 +12,30 @@ / {
>         model = "Google Villager (rev1+)";
>         compatible = "google,villager", "qcom,sc7280";
>  };
> +
> +&lpass_va_macro {
> +       vdd-micb-supply = <&pp1800_l2c>;
> +};

I wonder if we'll want to move this to some common "lpass audio" mixin
dtsi file, but we can do that later.