[PATCH v2 2/2] dt-bindings: display: rockchip: Convert cdn-dp-rockchip.txt to yaml

[Chaoyi Chen]

Hi Krzysztof,

On 2025/5/9 15:11, Krzysztof Kozlowski wrote:
> On 09/05/2025 09:02, Chaoyi Chen wrote:
>> +
>> +  clock-names:
>> +    items:
>> +      - const: core-clk
>> +      - const: pclk
>> +      - const: spdif
>> +      - const: grf
>> +
>> +  extcon:
>> +    $ref: /schemas/types.yaml#/definitions/phandle-array
>> +    description:
>> +      Phandle to the extcon device providing the cable state for the DP PHY.
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  phys:
>> +    $ref: /schemas/types.yaml#/definitions/phandle-array
> Just phandle. If this is an array (but why?), you need maxItems for
> outer and inner dimensions.

I think it could be phandle or phandle-array. Since the RK3399 DP has 
two PHYs, if we put in two PHYs here, the driver will pick one PHY port 
that is already plugged into the DP for output. If we fill in only one 
PHY here, then output is only allowed on the corresponding PHY.

Will add restrictions and add more descriptions in v3.


>
>> +    description:
>> +      Phandle to the PHY device for DP output.
>> +
>> +  ports:
>> +    $ref: /schemas/graph.yaml#/properties/ports
>> +
>> +    properties:
>> +      port at 0:
>> +        $ref: /schemas/graph.yaml#/properties/port
>> +        description: Input of the CDN DP
>> +        properties:
>> +          endpoint at 0:
>> +            description: Connection to the VOPB
>> +          endpoint at 1:
>> +            description: Connection to the VOPL
>> +      port at 1:
>> +        $ref: /schemas/graph.yaml#/properties/port
>> +        description: Output of the CDN DP
>> +
>> +    required:
>> +      - port at 0
>> +      - port at 1
>> +
>> +  power-domains:
>> +    maxItems: 1
>> +
>> +  resets:
>> +    maxItems: 4
>> +
>> +  reset-names:
>> +    items:
>> +      - const: spdif
>> +      - const: dptx
>> +      - const: apb
>> +      - const: core
>> +
>> +  rockchip,grf:
>> +    $ref: /schemas/types.yaml#/definitions/phandle
>> +    description:
>> +      Phandle to GRF register to control HPD.
>> +
>> +  "#sound-dai-cells":
>> +    const: 1
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - clock-names
>> +  - interrupts
>> +  - phys
>> +  - ports
>> +  - resets
>> +  - reset-names
>> +  - rockchip,grf
>> +
>> +additionalProperties: false
> Well, if you added dai-common $ref then this could have stayed as
> unevaluatedProperties, so you will allow names for the DAI as well.

Thanks for your clarification. Will fix in v3.


>
>
> Best regards,
> Krzysztof
>
>