Re: [PATCH v6 3/7] dt-bindings: drm/bridge: anx7625: Add mode-switch support

[Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>]

On 24/11/2022 11:20, Pin-yen Lin wrote:
> Analogix 7625 can be used in systems to switch the DP traffic between
> two downstreams, which can be USB Type-C DisplayPort alternate mode
> lane or regular DisplayPort output ports.
> 
> Update the binding to accommodate this usage by introducing a
> data-lanes and a mode-switch property on endpoints.
> 
> Also include the link to the product brief in the bindings.
> 
> Signed-off-by: Pin-yen Lin <treapking@chromium.org>
> 
> ---
> 
> Changes in v6:
> - Remove switches node and use endpoints and data-lanes property to
>   describe the connections.

Except missing testing few things...

> 
>  .../display/bridge/analogix,anx7625.yaml      | 73 ++++++++++++++++++-
>  1 file changed, 71 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> index 4590186c4a0b..5fdbf1f3bab8 100644
> --- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> @@ -12,7 +12,8 @@ maintainers:
>  
>  description: |
>    The ANX7625 is an ultra-low power 4K Mobile HD Transmitter
> -  designed for portable devices.
> +  designed for portable devices. Product brief is available at
> +  https://www.analogix.com/en/system/files/AA-002291-PB-6-ANX7625_ProductBrief.pdf
>  
>  properties:
>    compatible:
> @@ -112,10 +113,36 @@ properties:
>                data-lanes: true
>  
>        port@1:
> -        $ref: /schemas/graph.yaml#/properties/port
> +        $ref: /schemas/graph.yaml#/properties/port-base

I don't understand why you are changing this line.

>          description:
>            Video port for panel or connector.
>  
> +        patternProperties:
> +          "^endpoint@[01]$":
> +            $ref: /schemas/media/video-interfaces.yaml#
> +            type: object
> +            unevaluatedProperties: false
> +
> +            properties:
> +              reg:
> +                maxItems: 1
> +
> +              remote-endpoint: true
> +
> +              data-lanes:
> +                minItems: 1
> +                uniqueItems: true

These are confusing... you allow only one item, so why minItems and
uniqueItems?

> +                items:
> +                  - enum: [ 0, 1, 2, 3]
> +
> +              mode-switch:
> +                type: boolean
> +                description: Register this node as a Type-C mode switch or not.
> +
> +            required:
> +              - reg
> +              - remote-endpoint
> +
>      required:
>        - port@0
>        - port@1
> @@ -186,3 +213,45 @@ examples:
>              };
>          };
>      };
> +  - |
> +    &i2c3 {
> +	anx_bridge_dp: anx7625-dp@58 {

Messed up indentation.

> +	    compatible = "analogix,anx7625

Node names should be generic.
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

";
> +	    reg = <0x58>;

Best regards,
Krzysztof