linux-kernel - Re: [PATCH v8 1/7] dt-bindings: mediatek: mt8188: Add binding for MM & INFRA IOMMU

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Date:   Tue, 14 Mar 2023 10:14:01 +0000
From:   Yong Wu (吴勇) <Yong.Wu@...iatek.com>
To:     "krzysztof.kozlowski@...aro.org" <krzysztof.kozlowski@...aro.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Youlin Pei (裴友林) 
        <youlin.pei@...iatek.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Jianjiao Zeng (曾健姣) 
        <Jianjiao.Zeng@...iatek.com>,
        "robin.murphy@....com" <robin.murphy@....com>,
        "joro@...tes.org" <joro@...tes.org>,
        Chengci Xu (许承赐) 
        <Chengci.Xu@...iatek.com>,
        YF Wang (王云飞) <YF.Wang@...iatek.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        Mingyuan Ma (马鸣远) 
        <Mingyuan.Ma@...iatek.com>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "will@...nel.org" <will@...nel.org>
Subject: Re: [PATCH v8 1/7] dt-bindings: mediatek: mt8188: Add binding for MM
 & INFRA IOMMU

On Tue, 2023-03-14 at 07:46 +0100, Krzysztof Kozlowski wrote:
> On 14/03/2023 03:41, Yong Wu (吴勇) wrote:
> > Hi Krzysztof,
> > 
> > Thanks very much for your help review.
> > 
> > On Wed, 2023-03-08 at 11:35 +0100, Krzysztof Kozlowski wrote:
> > > On 07/03/2023 09:05, Yong Wu wrote:
> > > > From: "Chengci.Xu" <chengci.xu@...iatek.com>
> > > > 
> > > > Add descriptions for mt8188 IOMMU which also use ARM Short-
> > > > Descriptor
> > > > translation table format.
> > > > 
> > > > In mt8188, 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  ...
> > > > 
> > > > We also have an IOMMU that is for infra master like PCIe.
> > > > And infra master don't have the larb and ports.
> > > > 
> > > > Signed-off-by: Chengci.Xu <chengci.xu@...iatek.com>
> > > > Reviewed-by: Yong Wu <yong.wu@...iatek.com>
> > > > Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> > > 
> > > Indeed, I missed broken checkpatch/DCO chain.
> > 
> > Just confirm what this means.
> > 
> > Do you mean MAINTAINERS need to be updated since we add a prefix
> > "mediatek," for the header file?
> 
> No it means, run checkpatch.


"WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does
MAINTAINERS need updating?"
  
 This is the only warning when I run checkpatch. I will update the
MAINTAINERS in next version. Please tell me if I missed other parts.

Thanks.

> 
> Best regards,
> Krzysztof
> 
>