Re: [Patch v6] dt-bindings: media: s5p-mfc: convert bindings to json-schema

[Krzysztof Kozlowski]

On 09/03/2023 08:22, Aakarsh Jain wrote:
> 
> 
>> -----Original Message-----
>> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@xxxxxxxxxx]
>> Sent: 09 March 2023 12:15
>> To: Aakarsh Jain <aakarsh.jain@xxxxxxxxxxx>; linux-arm-
>> kernel@xxxxxxxxxxxxxxxxxxx; linux-media@xxxxxxxxxxxxxxx; linux-
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>> Subject: Re: [Patch v6] dt-bindings: media: s5p-mfc: convert bindings to json-
>> schema
>>
>> On 02/03/2023 16:18, Aakarsh Jain wrote:
>>>>
>>>> iommus:
>>>>   maxItems: 1
>>>> iommu-names: false
>>>>
>>> I am getting compilation errors with above property set and its breaking the
>> bindings.
>>> If we see these two nodes in dtsi files.
>>>                mfc: codec@13400000 {
>>>                         compatible = "samsung,mfc-v5"; ..
>>>                         iommus = <&sysmmu_mfc_l>, <&sysmmu_mfc_r>;
>>>                         iommu-names = "left", "right"; } And
>>>               mfc: codec@13400000 {
>>>                         compatible = "samsung,exynos3250-mfc", "samsung,mfc-v7";
>>>                         reg = <0x13400000 0x10000>; ...
>>>                         iommus = <&sysmmu_mfc>;
>>>                 };
>>> There is no iommu-names property for compatible "samsung,exynos3250-
>> mfc, samsung,mfc-v7", that’s why I kept
>>>         iommus:
>>>           minItems: 1
>>>           maxItems: 2
>>> I would even go with below if you agree?
>>>         iommus:
>>>           minItems: 1
>>>           maxItems: 2
>>>         iommus-names: false
>>
>> No, I don't agree. Why do you need two IOMMUs for Exynos3250?
>>>
> Here IOMMUs minItems:1 is meant for Exynos3250 while IOMMUs maxItems:2 meant for samsung,mfc-v5(Exynos 4).
> As you suggested 
> iommus:
>   maxItems: 1
> iommu-names: false
> 
> won't fit here.
> Since IOMMUs maxItems is 2 here for Exynos4. Giving maxItems:2 alone will also break the bindings. Thanks why suggested
>          iommus:
>            minItems: 1
>            maxItems: 2

Are you sure you are putting this in correct place? This is if:then for
Exynos3250, isn't it?

Best regards,
Krzysztof