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Date: Mon, 6 Jan 2020 15:57:16 -0600 From: Rob Herring <robh@...nel.org> To: Chao Hao <chao.hao@...iatek.com> Cc: Joerg Roedel <joro@...tes.org>, Matthias Brugger <matthias.bgg@...il.com>, iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, wsd_upstream@...iatek.com, Chao Hao <chao.hao@...iatek.com>, Jun Yan <jun.yan@...iatek.com>, Cui Zhang <zhang.cui@...iatek.com>, Yong Wu <yong.wu@...iatek.com>, Anan Sun <anan.sun@...iatek.com> Subject: Re: [PATCH v2 01/19] dt-bindings: mediatek: Add bindings for MT6779 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@...iatek.com> > --- > .../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.
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