linux-kernel - Re: [PATCH v3 2/5] ASoC: dt-bindings: Add dt binding for lpass hdmi

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Message-ID: <0aa914dd-6a6e-208d-d29f-214a84dfd8a2@linaro.org>
Date:   Fri, 4 Sep 2020 11:41:01 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
        agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
        broonie@...nel.org, robh+dt@...nel.org, plai@...eaurora.org,
        bgoswami@...eaurora.org, perex@...ex.cz, tiwai@...e.com,
        rohitkr@...eaurora.org, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     V Sujith Kumar Reddy <vsujithk@...eaurora.org>
Subject: Re: [PATCH v3 2/5] ASoC: dt-bindings: Add dt binding for lpass hdmi



On 31/08/2020 07:39, Srinivasa Rao Mandadapu wrote:
> From: V Sujith Kumar Reddy <vsujithk@...eaurora.org>
> 
> Adds bindings for lpass hdmi interface
> which can support audio path over dp.
> 
> Signed-off-by: Srinivasa Rao <srivasam@...eaurora.org>
> Signed-off-by: V Sujith Kumar Reddy <vsujithk@...eaurora.org>
> ---
>   .../devicetree/bindings/sound/qcom,lpass-cpu.yaml  | 51 ++++++++++++++++++++--
>   1 file changed, 47 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.yaml b/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.yaml
> index 09c9bd2..7c2ac0c 100644
> --- a/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.yaml
> +++ b/Documentation/devicetree/bindings/sound/qcom,lpass-cpu.yaml
> @@ -22,6 +22,7 @@ properties:
>         - qcom,lpass-cpu
>         - qcom,apq8016-lpass-cpu
>         - qcom,sc7180-lpass-cpu
> +      - qcom,sc7180-lpass-hdmi

Why do we need a new compatible per interface, IMO, you should just use 
the existing compatible.
Or please explain the reasons why we need this?

>   
>     reg:
>       maxItems: 1
> @@ -60,10 +61,12 @@ properties:
>       const: 0
>   
>   patternProperties:
> -  "(^mi2s-[0-9a-f]$|mi2s)":
> +  "^dai@[0-9a-f]$":
>       type: object
> -    description: Required properties for each DAI
> -
> +    description: |
> +      LPASS CPU dai node for each I2S device. Bindings of each node
> +      depends on the specific driver providing the functionality and
> +      properties.
>       properties:
>         reg:
>           maxItems: 1
> @@ -145,6 +148,22 @@ allOf:
>           - iommus
>           - power-domains
>   
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: qcom,sc7180-lpass-hdmi
> +    then:
> +      properties:
> +        clock-names:
> +          items:
> +            - const: pcnoc-sway-clk
> +            - const: audio-core
> +            - const: pcnoc-mport-clk
> +      required:
> +        - iommus
> +        - power-domains
> +
>   examples:
>     - |
>       #include <dt-bindings/sound/sc7180-lpass.h>
> @@ -178,12 +197,36 @@ examples:
>               #address-cells = <1>;
>               #size-cells = <0>;
>               /* Optional to set different MI2S SD lines */
> -            mi2s-primary@0 {
> +            dai@...s-primary {
>                   reg = <MI2S_PRIMARY>;
>                   qcom,playback-sd-lines = <1>;
>                   qcom,capture-sd-lines = <0>;
>               };
>           };
> +
> +        lpassh@...87000 {
> +            compatible = "qcom,sc7180-lpass-hdmi";
> +
> +            reg = <0 0x62d87000 0 0x68000>;
> +
> +            iommus = <&apps_smmu 0x1032 0>;
> +
> +            power-domains = <&lpass_hm 0>;
> +
> +            clocks = <&gcc 131>,
> +                 <&lpasscc 6>,
> +                 <&lpasscc 10>;
> +
> +            clock-names = "pcnoc-sway-clk", "audio-core",
> +                          "pcnoc-mport-clk";
> +
> +            #sound-dai-cells = <1>;
> +
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            interrupts = <0 268 1>;
> +        };
>       };
>   
>   ...
>