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| author | Yong Wu <yong.wu@mediatek.com> | 2021-01-11 14:18:46 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-02-01 14:27:59 +0300 |
| commit | fc3734698a435b301183acc8332f0a5fba868bc3 (patch) | |
| tree | 1a8342f1a2d16f2c866769cbfd898e572278f95c /Documentation/devicetree/bindings/iommu | |
| parent | ddd3e349b8aad5b814d17fc3bcf7a5a90af6d296 (diff) | |
| download | linux-fc3734698a435b301183acc8332f0a5fba868bc3.tar.xz | |
dt-bindings: mediatek: Add binding for mt8192 IOMMU
This patch adds decriptions for mt8192 IOMMU and SMI.
mt8192 also is MTK IOMMU gen2 which uses ARM Short-Descriptor translation
table format. The M4U-SMI HW diagram is as below:
EMI
|
M4U
|
------------
SMI Common
------------
|
+-------+------+------+----------------------+-------+
| | | | ...... | |
| | | | | |
larb0 larb1 larb2 larb4 ...... larb19 larb20
disp0 disp1 mdp vdec IPE IPE
All the connections are HW fixed, SW can NOT adjust it.
mt8192 M4U support 0~16GB iova range. we preassign different engines
into different iova ranges:
domain-id module iova-range larbs
0 disp 0 ~ 4G larb0/1
1 vcodec 4G ~ 8G larb4/5/7
2 cam/mdp 8G ~ 12G larb2/9/11/13/14/16/17/18/19/20
3 CCU0 0x4000_0000 ~ 0x43ff_ffff larb13: port 9/10
4 CCU1 0x4400_0000 ~ 0x47ff_ffff larb14: port 4/5
The iova range for CCU0/1(camera control unit) is HW requirement.
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Link: https://lore.kernel.org/r/20210111111914.22211-6-yong.wu@mediatek.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/iommu')
| -rw-r--r-- | Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml index ba6626347381..0f26fe14c8e2 100644 --- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml +++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml @@ -76,6 +76,7 @@ properties: - mediatek,mt8167-m4u # generation two - mediatek,mt8173-m4u # generation two - mediatek,mt8183-m4u # generation two + - mediatek,mt8192-m4u # generation two - description: mt7623 generation one items: @@ -115,7 +116,11 @@ properties: dt-binding/memory/mt6779-larb-port.h for mt6779, dt-binding/memory/mt8167-larb-port.h for mt8167, dt-binding/memory/mt8173-larb-port.h for mt8173, - dt-binding/memory/mt8183-larb-port.h for mt8183. + dt-binding/memory/mt8183-larb-port.h for mt8183, + dt-binding/memory/mt8192-larb-port.h for mt8192. + + power-domains: + maxItems: 1 required: - compatible @@ -133,11 +138,22 @@ allOf: - mediatek,mt2701-m4u - mediatek,mt2712-m4u - mediatek,mt8173-m4u + - mediatek,mt8192-m4u then: required: - clocks + - if: + properties: + compatible: + enum: + - mediatek,mt8192-m4u + + then: + required: + - power-domains + additionalProperties: false examples: |