On Sun, 5 Jan 2020 18:45:05 +0800, Chao Hao wrote: > This patch adds description for MT6779 IOMMU. > > MT6779 has two iommus, they are MM_IOMMU and APU_IOMMU which > use ARM Short-Descriptor translation format. > > The MT6779 IOMMU hardware diagram is as below, it is only a brief > diagram about iommu, it don't focus on the part of smi_larb, so > I don't describe the smi_larb detailedly. > > EMI > | > -------------------------------------- > | | > MM_IOMMU APU_IOMMU > | | > SMI_COMMOM----------- APU_BUS > | | | > SMI_LARB(0~11) SMI_LARB12(FAKE) SMI_LARB13(FAKE) > | | | > | | -------------- > | | | | | > Multimedia engine CCU VPU MDLA EMDA > > All the connections are hardware fixed, software can not adjust it. > > >From the diagram above, MM_IOMMU provides mapping for multimedia engine, > but CCU is connected with smi_common directly, we can take them as larb12. > APU_IOMMU provides mapping for APU engine, we can take them larb13. > Larb12 and Larb13 are fake larbs. > > Signed-off-by: Chao Hao <chao.hao@xxxxxxxxxxxx> > --- > .../bindings/iommu/mediatek,iommu.txt | 2 + > include/dt-bindings/memory/mt6779-larb-port.h | 215 ++++++++++++++++++ > 2 files changed, 217 insertions(+) > create mode 100644 include/dt-bindings/memory/mt6779-larb-port.h > Please add Acked-by/Reviewed-by tags when posting new versions. However, there's no need to repost patches *only* to add the tags. The upstream maintainer will do that for acks received on the version they apply. If a tag was not added on purpose, please state why and what changed.
