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SubjectRe: [PATCH 01/24] dt-bindings: mediatek: mt8195: Add binding for MM IOMMU
On Wed, 30 Jun 2021 10:34:41 +0800, Yong Wu wrote:
> This patch adds descriptions for mt8195 IOMMU which also use ARM
> Short-Descriptor translation table format.
>
> In mt8195, there are two smi-common HW and IOMMU, one is for vdo(video
> output), the other is for vpp(video processing pipe). They connects
> with different smi-larbs, then some setting(larbid_remap) is different.
> Differentiate them with the compatible string.
>
> Something like this:
>
> IOMMU(VDO) IOMMU(VPP)
> | |
> SMI_COMMON_VDO SMI_COMMON_VPP
> --------------- ----------------
> | | ... | | ...
> larb0 larb2 ... larb1 larb3 ...
>
> Another change is that we have a new IOMMU that is for infra master like
> PCIe and USB. The infra master don't have the larb and ports, thus we
> rename the port header file to mt8195-memory-port.h rather than
> mt8195-larb-port.h.
>
> Also, the IOMMU is not only for MM, thus, we don't call it "m4u" which
> means "MultiMedia Memory Management UNIT". thus, use the "iommu" as the
> compatiable string.
>
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> ---
> .../bindings/iommu/mediatek,iommu.yaml | 7 +
> .../dt-bindings/memory/mt8195-memory-port.h | 390 ++++++++++++++++++
> 2 files changed, 397 insertions(+)
> create mode 100644 include/dt-bindings/memory/mt8195-memory-port.h
>

Reviewed-by: Rob Herring <robh@kernel.org>

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