On Tue Oct 1 19:27:21 2024 +0800, Fei Shao wrote:
> 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 <[email protected]>
> Acked-by: Krzysztof Kozlowski <[email protected]>
> Signed-off-by: Hans Verkuil <[email protected]>
Patch committed.
Thanks,
Hans Verkuil
Documentation/devicetree/bindings/media/mediatek-jpeg-decoder.yaml | 3 ++-
Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml | 2 +-
2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/Documentation/devicetree/bindings/media/mediatek-jpeg-decoder.yaml
b/Documentation/devicetree/bindings/media/mediatek-jpeg-decoder.yaml
index cfabf360f278..a4aacd3eb189 100644
--- a/Documentation/devicetree/bindings/media/mediatek-jpeg-decoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek-jpeg-decoder.yaml
@@ -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.
diff --git a/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
b/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
index 83c020a673d6..5b15f8977f67 100644
--- a/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek-jpeg-encoder.yaml
@@ -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.
