linux-kernel - Re: [PATCH v9 1/4] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183

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Message-ID: <CANMq1KAY+KgXGNaVttESfW+1m3Daec6B-GqHgRW0gdFmOGf=qA@mail.gmail.com>
Date:   Wed, 13 Jan 2021 13:59:26 +0800
From:   Nicolas Boichat <drinkcat@...omium.org>
To:     Rob Herring <robh@...nel.org>
Cc:     Steven Price <steven.price@....com>,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        Fei Shao <fshao@...omium.org>,
        Kristian Kristensen <hoegsberg@...omium.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Devicetree List <devicetree@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        lkml <linux-kernel@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v9 1/4] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183

On Tue, Jan 12, 2021 at 11:07 PM Rob Herring <robh@...nel.org> wrote:
>
> On Fri, Jan 08, 2021 at 09:10:08AM +0800, Nicolas Boichat wrote:
> > Define a compatible string for the Mali Bifrost GPU found in
> > Mediatek's MT8183 SoCs.
> >
> > Signed-off-by: Nicolas Boichat <drinkcat@...omium.org>
> > Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>
> > ---
> >
> > (no changes since v6)
> >
> > Changes in v6:
> >  - Rebased, actually tested with recent mesa driver.
> >  - No change
> >
> > Changes in v5:
> >  - Rename "2d" power domain to "core2"
> >
> > Changes in v4:
> >  - Add power-domain-names description
> >    (kept Alyssa's reviewed-by as the change is minor)
> >
> > Changes in v3:
> >  - No change
> >
> >  .../bindings/gpu/arm,mali-bifrost.yaml        | 25 +++++++++++++++++++
> >  1 file changed, 25 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > index 184492162e7e..71b613ee5bd7 100644
> > --- a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > +++ b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > @@ -17,6 +17,7 @@ properties:
> >      items:
> >        - enum:
> >            - amlogic,meson-g12a-mali
> > +          - mediatek,mt8183-mali
> >            - realtek,rtd1619-mali
> >            - rockchip,px30-mali
> >        - const: arm,mali-bifrost # Mali Bifrost GPU model/revision is fully discoverable
> > @@ -87,6 +88,30 @@ allOf:
> >      then:
> >        required:
> >          - resets
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          contains:
> > +            const: mediatek,mt8183-mali
> > +    then:
> > +      properties:
> > +        sram-supply: true
>
> This has to be defined at the top-level or there will be an error when
> it is present (due to additionalProperties).
>
> In this if/then you can do:
>
> else:
>   sram-supply: false
>
> to disallow it if not 'mediatek,mt8183-mali'

I see. Thanks Rob, will send a v10.



>
> > +        power-domains:
> > +          description:
> > +            List of phandle and PM domain specifier as documented in
> > +            Documentation/devicetree/bindings/power/power_domain.txt
> > +          minItems: 3
> > +          maxItems: 3
> > +        power-domain-names:
> > +          items:
> > +            - const: core0
> > +            - const: core1
> > +            - const: core2
> > +
> > +      required:
> > +        - sram-supply
> > +        - power-domains
> > +        - power-domains-names
> >
> >  examples:
> >    - |
> > --
> > 2.29.2.729.g45daf8777d-goog
> >