[PATCH v4 2/3] dt-bindings: arm: mediatek: mmsys: Add OF graph support for board path

[AngeloGioacchino Del Regno]

Il 19/05/24 19:18, Alexandre Mergnat ha scritto:
> Hi Angelo,
> 
> On 16/05/2024 10:11, AngeloGioacchino Del Regno wrote:
>> +    oneOf:
>> +      - required:
>> +          - endpoint at 0
>> +      - required:
>> +          - endpoint at 1
>> +      - required:
>> +          - endpoint at 2
> 
> I'm not sure this is what you expect because I must remove this part to pass the 
> dt-validate.
> 
> I have 2 possible display at the same time (DSI and DPI), then I add this in my DTSI:
> 
>          mmsys: syscon at 14000000 {
>              compatible = "mediatek,mt8365-mmsys", "syscon";
>              reg = <0 0x14000000 0 0x1000>;
>              #clock-cells = <1>;
>              port {
>                  #address-cells = <1>;
>                  #size-cells = <0>;
> 
>                  mmsys_main: endpoint at 0 {
>                      reg = <0>;
>                      remote-endpoint = <&ovl0_in>;
>                  };
>                  mmsys_ext: endpoint at 1 {
>                      reg = <1>;
>                      remote-endpoint = <&rdma1_in>;
>                  };
>              };
>          };
> 
> But the DTS check returns me an error:
> 
> dt-validate -s Documentation/devicetree/bindings 
> arch/arm64/boot/dts/mediatek/mt8365-evk.dtb
> /home/*******/linux-upstream/arch/arm64/boot/dts/mediatek/mt8365-evk.dtb: 
> syscon at 14000000: port: More than one condition true in oneOf schema:
>          {'$ref': '/schemas/graph.yaml#/properties/port',
>           'oneOf': [{'required': ['endpoint at 0']},
>                     {'required': ['endpoint at 1']},
>                     {'required': ['endpoint at 2']}],
>           'properties': {'endpoint at 0': {'$ref': 
> '/schemas/graph.yaml#/properties/endpoint'},
>                          'endpoint at 1': {'$ref': 
> '/schemas/graph.yaml#/properties/endpoint'},
>                          'endpoint at 2': {'$ref': 
> '/schemas/graph.yaml#/properties/endpoint'}}}
>          from schema $id: 
> http://devicetree.org/schemas/arm/mediatek/mediatek,mmsys.yaml#
> 
> 
> In other hand, if I use "ports" to keep only one endpoint for each port:
> 
>          mmsys: syscon at 14000000 {
>              compatible = "mediatek,mt8365-mmsys", "syscon";
>              reg = <0 0x14000000 0 0x1000>;
>              #clock-cells = <1>;
>              ports {
>                  #address-cells = <1>;
>                  #size-cells = <0>;
> 
>                  port at 0 {
>                      #address-cells = <1>;
>                      #size-cells = <0>;
>                      reg = <0>;
>                      mmsys_main: endpoint at 0 {
>                          reg = <0>;
>                          remote-endpoint = <&ovl0_in>;
>                      };
>                  };
> 
>                  port at 1 {
>                      #address-cells = <1>;
>                      #size-cells = <0>;
>                      reg = <1>;
>                      mmsys_ext: endpoint at 1 {
>                          reg = <1>;
>                          remote-endpoint = <&rdma1_in>;
>                      };
>                  };
>              };
>          };
> 
> The DTS check returns another error:
> 
> dt-validate -s Documentation/devicetree/bindings 
> arch/arm64/boot/dts/mediatek/mt8365-evk.dtb
> /home/*******/linux-upstream/arch/arm64/boot/dts/mediatek/mt8365-evk.dtb: 
> syscon at 14000000: 'ports' does not match any of the regexes: 'pinctrl-[0-9]+'
>          from schema $id: 
> http://devicetree.org/schemas/arm/mediatek/mediatek,mmsys.yaml#
> 
> Additionally, with the last DTS example, displays aren't working, probably because 
> "ports" isn't well parsed.
> 
> So, I don't know how you want to manage multiple display, but IMHO there are 2 ways:
> - removing the current "oneOf".

...eh I think this should be anyOf instead :-)

I'll check later and send a v5.

Cheers,
Angelo

> - adding the "ports" support in the documentation and driver (to be parsed).
> 
> Still possible I missed something and I doing shit :)
>