linux-kernel - Re: [PATCH] dt-bindings: display: panel: add common definition of ports

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Message-ID: <20230418222613.GA2408838-robh@kernel.org>
Date:   Tue, 18 Apr 2023 17:26:13 -0500
From:   Rob Herring <robh@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Neil Armstrong <neil.armstrong@...aro.org>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: Re: [PATCH] dt-bindings: display: panel: add common definition of
 ports

On Sun, Apr 16, 2023 at 05:39:29PM +0200, Krzysztof Kozlowski wrote:
> Few panel bindings for dual-link connections just type "ports: true",
> which does not enforce any type.  Add common definition of ports, so the
> type will be fixed.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> ---
> 
> Cc: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  .../bindings/display/panel/panel-common.yaml     | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/panel-common.yaml b/Documentation/devicetree/bindings/display/panel/panel-common.yaml
> index 5b38dc89cb21..ad62d34e6fa3 100644
> --- a/Documentation/devicetree/bindings/display/panel/panel-common.yaml
> +++ b/Documentation/devicetree/bindings/display/panel/panel-common.yaml
> @@ -70,6 +70,16 @@ properties:
>    port:
>      $ref: /schemas/graph.yaml#/properties/port
>  
> +  # For dual-link connections
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +    patternProperties:
> +      "^port@[0-9a-f]+$":
> +        $ref: /schemas/graph.yaml#/$defs/port-base

This allows any undocumented property.

> +
> +    required:
> +      - port@0
> +

I don't think this should be added here because users must define what 
each port is. With it here, we're going to validate the nodes twice as 
well. Same can be said for 'port' though. It can't be extended though.

I originally wanted to a do a meta-schema to enforce some of this, but 
there's just too many exceptions.

Rob