[1/2] dt-bindings: media: mediatek-jpeg-encoder: change max ioomus count

  MT8186 has 4 iommus in the list, to cope with this situation, adjust
the maxItems to 4 (instead of previous 2).
Add also minItems as 1 since iommus are mandatory, to avoid warning
on the example.

Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
---
 .../devicetree/bindings/media/mediatek-jpeg-encoder.yaml       | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
  

Il 27/12/23 14:08, Eugen Hristev ha scritto:
> MT8186 has 4 iommus in the list, to cope with this situation, adjust
> the maxItems to 4 (instead of previous 2).
> Add also minItems as 1 since iommus are mandatory, to avoid warning
> on the example.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
> ---
>   .../devicetree/bindings/media/mediatek-jpeg-encoder.yaml       | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml b/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
> index 37800e1908cc..60c75b9312e8 100644
> --- a/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
> +++ b/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
> @@ -38,7 +38,8 @@ properties:
>       maxItems: 1
>   
>     iommus:
> -    maxItems: 2
> +    minItems: 1
> +    maxItems: 4
>       description: |
>         Points to the respective IOMMU block with master port as argument, see
>         Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.

(commit title) `ioomus` is something I've never heard of before... :-P

Please fix the typo, after which:

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
  

On Wed, Dec 27, 2023 at 03:08:11PM +0200, Eugen Hristev wrote:
> MT8186 has 4 iommus in the list, to cope with this situation, adjust
> the maxItems to 4 (instead of previous 2).
> Add also minItems as 1 since iommus are mandatory, to avoid warning
> on the example.

maxItems alone means minItems is the same size. If IOMMU is required, 
then 'required' is where that is defined. Is there a case where 1 IOMMU 
is valid? If so, what h/w has this case.

Rob
  

On 1/9/24 05:27, Rob Herring wrote:
> On Wed, Dec 27, 2023 at 03:08:11PM +0200, Eugen Hristev wrote:
>> MT8186 has 4 iommus in the list, to cope with this situation, adjust
>> the maxItems to 4 (instead of previous 2).
>> Add also minItems as 1 since iommus are mandatory, to avoid warning
>> on the example.
> 
> maxItems alone means minItems is the same size. If IOMMU is required, 
> then 'required' is where that is defined. Is there a case where 1 IOMMU 
> is valid? If so, what h/w has this case.
> 
> Rob
> 
> 

Hello Rob,

Without setting a minItems , the example in the binding fails, because it has just
2 items, while the maxItems is now 4.
I set minItems as 1 to avoid restricting any kind of hardware to have at least 2
items, but if you claim that previously, maxItems=minItems=2 , I will change this to 2.
Is that fine with you ?

Eugen
  

On 15/01/2024 04:57, Eugen Hristev wrote:
> On 1/9/24 05:27, Rob Herring wrote:
>> On Wed, Dec 27, 2023 at 03:08:11PM +0200, Eugen Hristev wrote:
>>> MT8186 has 4 iommus in the list, to cope with this situation, adjust
>>> the maxItems to 4 (instead of previous 2).
>>> Add also minItems as 1 since iommus are mandatory, to avoid warning
>>> on the example.
>>
>> maxItems alone means minItems is the same size. If IOMMU is required,
>> then 'required' is where that is defined. Is there a case where 1 IOMMU
>> is valid? If so, what h/w has this case.
>>
>> Rob
>>
>>
> 
> Hello Rob,
> 
> Without setting a minItems , the example in the binding fails, because it has just
> 2 items, while the maxItems is now 4.
> I set minItems as 1 to avoid restricting any kind of hardware to have at least 2
> items, but if you claim that previously, maxItems=minItems=2 , I will change this to 2.
> Is that fine with you ?
> 

I think that's what you should do yes. If in the future there shows up a 
platform with just one iommu, then we can fix that.

Regards,
Matthias