Re: [PATCH 3/9] dt-bindings: display: renesas,rzg2l-du: Document RZ/G2UL DU bindings

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On Tue, Jul 02, 2024 at 10:46:13AM +0100, Biju Das wrote:
> Document DU found in RZ/G2UL SoC. The DU block is identical to RZ/G2L
> SoC, but has only DPI interface.
> 
> While at it, add missing required property port@1 for RZ/G2L and RZ/V2L
> SoCs.

A new required property is an ABI break, it deserves more of an
explanation than "in passing..."

> 
> Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> ---
>  .../bindings/display/renesas,rzg2l-du.yaml    | 32 +++++++++++++++++--
>  1 file changed, 29 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/renesas,rzg2l-du.yaml b/Documentation/devicetree/bindings/display/renesas,rzg2l-du.yaml
> index 08e5b9478051..c0fec282fa45 100644
> --- a/Documentation/devicetree/bindings/display/renesas,rzg2l-du.yaml
> +++ b/Documentation/devicetree/bindings/display/renesas,rzg2l-du.yaml
> @@ -18,6 +18,7 @@ properties:
>    compatible:
>      oneOf:
>        - enum:
> +          - renesas,r9a07g043u-du # RZ/G2UL
>            - renesas,r9a07g044-du # RZ/G2{L,LC}
>        - items:
>            - enum:
> @@ -60,9 +61,6 @@ properties:
>          $ref: /schemas/graph.yaml#/properties/port
>          unevaluatedProperties: false
>  
> -    required:
> -      - port@0
> -
>      unevaluatedProperties: false
>  
>    renesas,vsps:
> @@ -88,6 +86,34 @@ required:
>  
>  additionalProperties: false
>  
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: renesas,r9a07g043u-du
> +    then:
> +      properties:
> +        ports:
> +          properties:
> +            port@0: false
> +            port@1:
> +              description: DPI
> +
> +          required:
> +            - port@1
> +    else:
> +      properties:
> +        ports:
> +          properties:
> +            port@0:
> +              description: DSI
> +            port@1:
> +              description: DPI
> +
> +          required:
> +            - port@0
> +            - port@1
>  examples:
>    # RZ/G2L DU
>    - |
> -- 
> 2.43.0
> 

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