linux-kernel - Re: [PATCH 02/24] dt-bindings: mediatek: mt8195: Add binding for infra IOMMU

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Date:   Wed, 30 Jun 2021 08:27:13 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Yong Wu <yong.wu@...iatek.com>, Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>
Cc:     Evan Green <evgreen@...omium.org>, Tomasz Figa <tfiga@...gle.com>,
        Tomasz Figa <tfiga@...omium.org>,
        linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, youlin.pei@...iatek.com,
        Nicolas Boichat <drinkcat@...omium.org>, anan.sun@...iatek.com,
        chao.hao@...iatek.com
Subject: Re: [PATCH 02/24] dt-bindings: mediatek: mt8195: Add binding for
 infra IOMMU

On 30/06/2021 04:34, 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>
> ---
>  .../bindings/iommu/mediatek,iommu.yaml         | 14 +++++++++++++-
>  .../dt-bindings/memory/mt8195-memory-port.h    | 18 ++++++++++++++++++
>  include/dt-bindings/memory/mtk-memory-port.h   |  2 ++
>  3 files changed, 33 insertions(+), 1 deletion(-)
> 


Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>


Best regards,
Krzysztof