linux-kernel - Re: [PATCH v5 1/2] ASoC: google: dt-bindings: modify machine bindings for two MICs case

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Date:   Thu, 5 Nov 2020 12:43:50 -0600
From:   Rob Herring <robh@...nel.org>
To:     Ajye Huang <ajye.huang@...il.com>
Cc:     linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Rohit kumar <rohitkr@...eaurora.org>,
        Banajit Goswami <bgoswami@...eaurora.org>,
        Patrick Lai <plai@...eaurora.org>,
        Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
        srinivas.kandagatla@...aro.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>, cychiang@...omium.org,
        tzungbi@...omium.org, dianders@...omium.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        alsa-devel@...a-project.org,
        Ajye Huang <ajye_huang@...pal.corp-partner.google.com>
Subject: Re: [PATCH v5 1/2] ASoC: google: dt-bindings: modify machine
 bindings for two MICs case

On Tue, Nov 03, 2020 at 06:30:50PM +0800, Ajye Huang wrote:
> Add a property "dmic-gpios" for switching between two MICs.
> 
> Signed-off-by: Ajye Huang <ajye_huang@...pal.corp-partner.google.com>
> ---
>  .../bindings/sound/google,sc7180-trogdor.yaml | 58 +++++++++++++++++++
>  1 file changed, 58 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml b/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
> index efc34689d6b5..9e0505467e57 100644
> --- a/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
> +++ b/Documentation/devicetree/bindings/sound/google,sc7180-trogdor.yaml
> @@ -34,6 +34,9 @@ properties:
>    "#size-cells":
>      const: 0
>  
> +  dmic-gpios:
> +    description: GPIO for switching between DMICs

Need to define how many (maxItems: 1).

> +
>  patternProperties:
>    "^dai-link(@[0-9])?$":
>      description:
> @@ -81,6 +84,7 @@ additionalProperties: false
>  examples:
>  
>    - |
> +    //Example 1
>      sound {
>          compatible = "google,sc7180-trogdor";
>          model = "sc7180-rt5682-max98357a-1mic";
> @@ -128,3 +132,57 @@ examples:
>              };
>          };
>      };
> +
> +  - |
> +    //Example 2 (2mic case)
> +    sound {
> +        compatible = "google,sc7180-trogdor";
> +        model = "sc7180-rt5682-max98357a-2mic";
> +
> +        audio-routing =
> +                    "Headphone Jack", "HPOL",
> +                    "Headphone Jack", "HPOR";
> +
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        dmic-gpios = <&tlmm 86 0>;

Do we really need another example for this? Can't you just add it to the 
existing example?

> +
> +        dai-link@0 {
> +            link-name = "MultiMedia0";
> +            reg = <0>;
> +            cpu {
> +                sound-dai = <&lpass_cpu 0>;
> +            };
> +
> +            codec {
> +                sound-dai = <&alc5682 0>;
> +            };
> +        };
> +
> +        dai-link@1 {
> +            link-name = "MultiMedia1";
> +            reg = <1>;
> +            cpu {
> +                sound-dai = <&lpass_cpu 1>;
> +            };
> +
> +            codec {
> +                sound-dai = <&max98357a>;
> +            };
> +        };
> +
> +        dai-link@2 {
> +            link-name = "MultiMedia2";
> +            reg = <2>;
> +            cpu {
> +                sound-dai = <&lpass_hdmi 0>;
> +            };
> +
> +            codec {
> +                sound-dai = <&msm_dp>;
> +            };
> +        };
> +    };
> +
> +...
> -- 
> 2.25.1
>