linux-kernel - Re: [PATCH v29 1/7] dt-bindings: mediatek: add ethdr definition for mt8195

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Date:   Thu, 16 Mar 2023 06:19:15 +0000
From:   Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>
To:     "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "krzysztof.kozlowski@...aro.org" <krzysztof.kozlowski@...aro.org>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>
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>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        CK Hu (胡俊光) <ck.hu@...iatek.com>,
        "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>,
        "clang-built-linux@...glegroups.com" 
        <clang-built-linux@...glegroups.com>,
        "ndesaulniers@...gle.com" <ndesaulniers@...gle.com>
Subject: Re: [PATCH v29 1/7] dt-bindings: mediatek: add ethdr definition for
 mt8195

On Wed, 2023-03-15 at 08:16 +0100, Krzysztof Kozlowski wrote:
> On 15/03/2023 04:45, Nancy Lin (林欣螢) wrote:
> 
> Trim the replies and remove unneeded context. You want to get the
> attention of other people, not force them to read entire email.
> 
> > > +  mediatek,gce-client-reg:>> +    $ref:
> > > /schemas/types.yaml#/definitions/phandle-array
> > > +    description: The register of display function block to be
> > > set by
> > > gce.
> > > +      There are 4 arguments in this property, gce node, subsys
> > > id,
> > > offset and
> > > +      register size. The subsys id is defined in the gce header
> > > of
> > > each chips
> > > +      include/dt-bindings/gce/<chip>-gce.h, mapping to the
> > > register
> > > of display
> > > +      function block.
> > > +    items:
> > > +      items:
> > > +        - description: phandle of GCE
> > > +        - description: GCE subsys id
> > > +        - description: register offset
> > > +        - description: register size
> > > +    minItems: 7
> > > +    maxItems: 7
> > > +
> > 
> > Hi Rob and krzysztof,
> > 
> > I got the two messages when running dt_binding_check [1]. This
> > binding
> > patch was sent previously in [2]. 
> > 
> > If I remove the following items/minItems/maxItems in the
> > mediatek,gce-
> > client property, the two message disappear. I don't know what's
> > wrong
> > with the original syntax. Do you have any suggestions for this?
> > 
> > -    items:
> > -      items:
> > -        - description: phandle of GCE
> > -        - description: GCE subsys id
> > -        - description: register offset
> > -        - description: register size
> > -    minItems: 7
> > -    maxItems: 7
> > 
> > 
> > [1].
> > Documentation/devicetree/bindings/display/mediatek/mediatek,ethdr.e
> > xamp
> > le.dtb
> > /proj/mtk19347/cros/src/third_party/kernel/v5.10/Documentation/devi
> > cetr
> > ee/bindings/display/mediatek/mediatek,ethdr.example.dtb: 
> > hdr-engine@...14000: mediatek,gce-client-reg:0: [4294967295, 7,
> > 16384,
> > 4096, 4294967295, 7, 20480, 4096, 4294967295, 7, 28672, 4096,
> > 4294967295, 7, 36864, 4096, 4294967295, 7, 40960, 4096, 4294967295,
> > 7,
> > 45056, 4096, 4294967295, 7, 49152, 4096] is too long
> >         From schema:
> 
> This looks like known issue with phandles with variable number of
> arguments. Either we add it to the exceptions or just define it in
> reduced way like in other cases - only maxItems: 1 without describing
> items.
> 
> 
> Best regards,
> Krzysztof


Hi Krzysztof,

Thanks for the comment.

But I have several items for this vendor property in the binding
example.
Can I remove maxItems? Change the mediatek,gce-client-reg as [1].

[1]
  mediatek,gce-client-reg:
    $ref: /schemas/types.yaml#/definitions/phandle-array
    description: The register of display function block to be set by
gce.
      There are 4 arguments in this property, gce node, subsys id,
offset and
      register size. The subsys id is defined in the gce header of each
chips
      include/dt-bindings/gce/<chip>-gce.h, mapping to the register of
display
      function block.

Regards,
Nancy

>