[PATCH v2 06/11] dt-bindings: display/msm: move qcom, sc7180-mdss schema to mdss.yaml

[Krzysztof Kozlowski]

On 22/08/2022 22:04, Dmitry Baryshkov wrote:
>>>   required:
>>>     - compatible
>>>     - reg
>>> @@ -177,7 +204,19 @@ patternProperties:
>>>       # TODO: add reference once the mdp5 is converted
>>>   
>>>     "^display-controller@(0|[1-9a-f][0-9a-f]*)$":
>>> -    $ref: dpu-sdm845.yaml
>>> +    oneOf:
>>> +      - $ref: dpu-sc7180.yaml
>>> +      - $ref: dpu-sdm845.yaml
>>
>> I don't think this is good approach. These are strictly tied, so you
>> should have rather per SoC MDSS schema pulling in:
>> 1. common MDSS
>> 2. specific children schemas
>>
>> This makes it quite obvious and specific. Your setup now allows putting
>> sc7180-dpu under sdm845-dpu.
> 
> Then we should probably also use very specific $ref and compat check for 
> all other entries in this file too. I understand your concern, however 
> I'd prefer to have the working schema which is not tight enough compared 
> to set of schema files that completely do not work.

Why they cannot be tight and working?

> And current 
> dpu-*yaml do not work as they allow just the display-controller beneath 
> the mdss node.

Sure, this can be fixed but not really in a relaxing way.

> 
> If you absolutely insist on me making the binding tight enough, I'll 
> rework the bindings to clearly specify which SoC has which nodes.

I do not see the drawbacks of specific/tight approach, so yes, please
make it tight.


Best regards,
Krzysztof