diff options
authorIrui Wang <irui.wang@mediatek.com>2021-06-05 10:29:14 +0800
committerHans Verkuil <hverkuil-cisco@xs4all.nl>2021-06-14 12:22:43 +0200
commit204aef4b894edc602acc3a93b6eff2e5b6b996a3 (patch)
parent718eb0e6703b9070a4f798bf7bbafbfa12130b8d (diff)
dt-bindings: media: mtk-vcodec: Add dma-ranges property
The mt8192 iommu support 0~16GB iova. We separate it to four banks: 0~4G; 4G~8G; 8G~12G; 12G~16G. The "dma-ranges" could be used to adjust the bank we locate. If we don't set this property. The default range always is 0~4G. This is optional and only needed in mt8192, the dma ranges should not cross 4G/8G/12G. Here we don't have actual bus/parent concept here. And the iova requirement is for our HW. Thus put the property in our node. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Irui Wang <irui.wang@mediatek.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
index 06db6837cefd..5bb9e6e191b7 100644
--- a/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
+++ b/Documentation/devicetree/bindings/media/mediatek-vcodec.txt
@@ -22,6 +22,7 @@ Required properties:
- iommus : should point to the respective IOMMU block with master port as
argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
for details.
+- dma-ranges : describes the dma address range space that the codec hw access.
One of the two following nodes:
- mediatek,vpu : the node of the video processor unit, if using VPU.
- mediatek,scp : the node of the SCP unit, if using SCP.

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