linux-kernel - Re: [PATCH v2 02/29] dt-bindings: mediatek: mt8195: Add binding for infra IOMMU

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Date:   Tue, 17 Aug 2021 16:44:53 -0500
From:   Rob Herring <robh@...nel.org>
To:     Yong Wu <yong.wu@...iatek.com>
Cc:     anan.sun@...iatek.com, Matthias Brugger <matthias.bgg@...il.com>,
        Nicolas Boichat <drinkcat@...omium.org>,
        linux-arm-kernel@...ts.infradead.org, chao.hao@...iatek.com,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Evan Green <evgreen@...omium.org>,
        linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        youlin.pei@...iatek.com, srv_heupstream@...iatek.com,
        Rob Herring <robh+dt@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        devicetree@...r.kernel.org, Will Deacon <will@...nel.org>,
        linux-mediatek@...ts.infradead.org, Joerg Roedel <joro@...tes.org>,
        Tomasz Figa <tfiga@...omium.org>,
        Tomasz Figa <tfiga@...gle.com>
Subject: Re: [PATCH v2 02/29] dt-bindings: mediatek: mt8195: Add binding for
 infra IOMMU

On Fri, 13 Aug 2021 14:52:57 +0800, Yong Wu wrote:
> In mt8195, we have a new IOMMU that is for INFRA IOMMU. its masters
> mainly are PCIe and USB. Different with MM IOMMU, all these masters
> connect with IOMMU directly, there is no mediatek,larbs property for
> infra IOMMU.
> 
> Another thing is about PCIe ports. currently the function
> "of_iommu_configure_dev_id" only support the id number is 1, But our
> PCIe have two ports, one is for reading and the other is for writing.
> see more about the PCIe patch in this patchset. Thus, I only list
> the reading id here and add the other id in our driver.
> 
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
> ---
> Change note: use "contains" commented from Rob.
> ---
>  .../bindings/iommu/mediatek,iommu.yaml         | 13 ++++++++++++-
>  .../dt-bindings/memory/mt8195-memory-port.h    | 18 ++++++++++++++++++
>  include/dt-bindings/memory/mtk-memory-port.h   |  2 ++
>  3 files changed, 32 insertions(+), 1 deletion(-)
> 

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