linux-kernel - Re: [PATCH v28 01/11] dt-bindings: arm: mediatek: mmsys: add vdosys1 compatible for MT8195

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Message-ID: <de21390898759ce979da8d2ae76a93982f59c149.camel@mediatek.com>
Date:   Tue, 22 Nov 2022 10:51:35 +0000
From:   Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>
To:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        Jason-JH Lin (林睿祥) 
        <Jason-JH.Lin@...iatek.com>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "linux@...ck-us.net" <linux@...ck-us.net>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "wim@...ux-watchdog.org" <wim@...ux-watchdog.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "nfraprado@...labora.com" <nfraprado@...labora.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Singo Chang (張興國) 
        <Singo.Chang@...iatek.com>,
        "nathan@...nel.org" <nathan@...nel.org>,
        Yongqiang Niu (牛永强) 
        <yongqiang.niu@...iatek.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "llvm@...ts.linux.dev" <llvm@...ts.linux.dev>,
        "ndesaulniers@...gle.com" <ndesaulniers@...gle.com>
Subject: Re: [PATCH v28 01/11] dt-bindings: arm: mediatek: mmsys: add vdosys1
 compatible for MT8195

Dear Matthias,

Thanks for the review.

On Thu, 2022-11-10 at 14:10 +0100, Matthias Brugger wrote:
> 
> On 09/11/2022 06:10, Jason-JH Lin (林睿祥) wrote:
> > On Tue, 2022-11-08 at 18:46 +0100, Matthias Brugger wrote:
> > > 
> > > On 07/11/2022 08:22, Nancy.Lin wrote:
> > > > Add vdosys1 mmsys compatible for MT8195 platform.
> > > > 
> > > > For MT8195, VDOSYS0 and VDOSYS1 are 2 display HW pipelines
> > > > binding
> > > > to
> > > > 2 different power domains, different clock drivers and
> > > > different
> > > > mediatek-drm drivers.
> > > > 
> > > > Signed-off-by: Nancy.Lin <nancy.lin@...iatek.com>
> > > > Reviewed-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
> > > > ---
> > > >  
> > > > .../devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml      |
> > > > 4
> > > > +++-
> > > >   1 file changed, 3 insertions(+), 1 deletion(-)
> > > > 
> > > > diff --git
> > > > a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys
> > > > .yam
> > > > l
> > > > b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys
> > > > .yam
> > > > l
> > > > index 0711f1834fbd..aaabe2196185 100644
> > > > ---
> > > > a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys
> > > > .yam
> > > > l
> > > > +++
> > > > b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys
> > > > .yam
> > > > l
> > > > @@ -48,7 +48,9 @@ properties:
> > > >             - const: syscon
> > > >   
> > > >         - items:
> > > > -          - const: mediatek,mt8195-vdosys0
> > > > +          - enum:
> > > > +              - mediatek,mt8195-vdosys0
> > > > +              - mediatek,mt8195-vdosys1
> > > >             - const: mediatek,mt8195-mmsys
> > > >             - const: syscon
> > > >   
> > > 
> > > I think we had that several times already:
> > > 
> > 
> > 
https://lore.kernel.org/all/6bbe9527-ae48-30e0-fb45-519223a744d7@linaro.org/
> > > 
> > > We will something like this, but please check that this does not
> > > give
> > > any 
> > > errors/warnings:
> > > 
> > > diff --git
> > > a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.y
> > > aml 
> > > b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.y
> > > aml
> > > index eb451bec23d3d..8e9c4f4d7c389 100644
> > > ---
> > > a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.y
> > > aml
> > > +++
> > > b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.y
> > > aml
> > > @@ -32,13 +32,22 @@ properties:
> > >                 - mediatek,mt8183-mmsys
> > >                 - mediatek,mt8186-mmsys
> > >                 - mediatek,mt8192-mmsys
> > > -              - mediatek,mt8195-mmsys
> > >                 - mediatek,mt8365-mmsys
> > >             - const: syscon
> > >         - items:
> > >             - const: mediatek,mt7623-mmsys
> > >             - const: mediatek,mt2701-mmsys
> > >             - const: syscon
> > > +      - items:
> > > +          - const: mediatek,mt8195-vdosys0
> > > +          - const: syscon
> > > +      - items:
> > > +          - const: mediatek,mt8195-vdosys1
> > > +          - const: syscon
> > > +      - items:
> > > +          - const: mediatek,mt8195-mmsys
> > > +          - const: syscon
> > > +      deprecated: true
> > > 
> > >     reg:
> > >       maxItems: 1
> > 
> > Hi Matthias,
> > 
> > As the vdosys0 previous reviewed patch:
> > 
> > 
https://urldefense.com/v3/__https://patchwork.kernel.org/project/linux-mediatek/patch/20220927152704.12018-2-jason-jh.lin@mediatek.com/__;!!CTRNKA9wMg0ARbw!zRdbIyyAsfqob2kapMAcKYATAguhEV0x0qE5cTOAcWUNhzeAbMHzZoos_2QzUCxS$
> >  
> > Should I modify the vdosys0 items format like your example?
> > 
> > Or should vdosys1 add items format like vdosys0's previous patch?
> >      - items:
> >          - const: mediatek,mt8195-vdosys1
> >          - const: mediatek,mt8195-mmsys
> >          - const: syscon
> > 
> 
> No, vdosys1 must not have mediatek,mt8195-mmsys fallback.
> 
> Regards,
> Matthias
> 

I will fix it and add the following vdosys1 binding base on [1].

      - description: vdosys0 and vdosys1 are 2 display HW pipelines,
                     so mt8195 binding should be deprecated.
        deprecated: true
        items:
          - const: mediatek,mt8195-mmsys
          - const: syscon
      - items:
          - const: mediatek,mt7623-mmsys
          - const: mediatek,mt2701-mmsys
          - const: syscon
      - items:
          - const: mediatek,mt8195-vdosys0
          - const: mediatek,mt8195-mmsys
          - const: syscon
 +    - items:
 +        - const: mediatek,mt8195-vdosys1
 +        - const: syscon

[1] 
https://kernel.googlesource.com/pub/scm/linux/kernel/git/matthias.bgg/linux/+/b237efd47df7d25b78c306e90b97c5aa0ff4c4fc/Documentation/devicetree/bindings/arm/mediatek/mediatek%2Cmmsys.yaml

Regards,
Nancy


> > Regards,
> > Jason-JH.Lin
> > 
> > 
> > 
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