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dt-bindings: media: mediatek,jpeg: Relax IOMMU max item count

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On MediaTek platforms with Multimedia MMU (M4U), a multimedia hardware
can be assigned with a local arbiter (LARB) which has a maximum of 32
ports for MediaTek's IOMMU infrastructure. That means there can be at
most 32 items in the iommus property in theory.

Instead of relaxing the max item count every time a newly introduced
device tree hits the limit, bump the number to 32 as an one-time effort.

On the other hand, all existing and foreseeable JPEG decoder nodes at
this point have at least 2 IOMMUs, so set minItems to 2 accordingly.

Signed-off-by: Fei Shao <fshao@chromium.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
This commit is contained in:
Fei Shao 2024-10-01 19:27:21 +08:00 committed by Hans Verkuil
parent 3edd1fc48d
commit b15a5ce863
2 changed files with 3 additions and 2 deletions
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3
Documentation/devicetree/bindings/media/mediatek-jpeg-decoder.yaml
View File

@ -44,7 +44,8 @@ properties:
maxItems: 1
iommus:
maxItems: 2
minItems: 2
maxItems: 32
description: |
Points to the respective IOMMU block with master port as argument, see
Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.

2
Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
View File

@ -39,7 +39,7 @@ properties:
iommus:
minItems: 2
maxItems: 4
maxItems: 32
description: |
Points to the respective IOMMU block with master port as argument, see
Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml for details.