linux-kernel - Re: [PATCH v2] dt-bindings: display: mediatek: split: add clocks count constraint for MT8195

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Message-ID: <e78c2a518b258d6287233367be1e071c2da1a724.camel@mediatek.com>
Date: Mon, 30 Sep 2024 03:28:44 +0000
From: Moudy Ho (何宗原) <Moudy.Ho@...iatek.com>
To: "krzk@...nel.org" <krzk@...nel.org>
CC: "linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
	Jason-JH Lin (林睿祥) <Jason-JH.Lin@...iatek.com>,
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	<simona@...ll.ch>, "mripard@...nel.org" <mripard@...nel.org>,
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	"p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
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	"conor+dt@...nel.org" <conor+dt@...nel.org>, "robh@...nel.org"
	<robh@...nel.org>, Macpaul Lin (林智斌)
	<Macpaul.Lin@...iatek.com>, "airlied@...il.com" <airlied@...il.com>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "dri-devel@...ts.freedesktop.org"
	<dri-devel@...ts.freedesktop.org>, "matthias.bgg@...il.com"
	<matthias.bgg@...il.com>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	"moudy.ho@...iatek.corp-partner.google.com"
	<moudy.ho@...iatek.corp-partner.google.com>
Subject: Re: [PATCH v2] dt-bindings: display: mediatek: split: add clocks
 count constraint for MT8195

Hi Krzysztof,

On Fri, 2024-09-27 at 11:37 +0200, Krzysztof Kozlowski wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  On Fri, Sep 27, 2024 at 01:51:40PM +0800, Moudy Ho wrote:
> > From: Moudy Ho <moudy.ho@...iatek.corp-partner.google.com>
> > 
> > The display node in mt8195.dtsi was triggering a CHECK_DTBS error
> due
> > to an excessively long 'clocks' property:
> >   display@...06000: clocks: [[31, 14], [31, 43], [31, 44]] is too
> long
> > 
> > To resolve this issue, apply the limit by setting 'maxItems: 3' in
> MT8195
> > additional condition.
> > 
> > Fixes: 4ed545e7d100 ("dt-bindings: display: mediatek: disp: split
> each block to individual yaml")
> > Signed-off-by: Macpaul Lin <macpaul.lin@...iatek.com>
> > Signed-off-by: Moudy Ho <moudy.ho@...iatek.com>
> 
> Your SoB does not match.
> 
> Please run scripts/checkpatch.pl and fix reported warnings. Then
> please
> run  and (probably) fix more warnings.
> Some warnings can be ignored, especially from --strict run, but the
> code
> here looks like it needs a fix. Feel free to get in touch if the
> warning
> is not clear.
> 

I apololgize for the mismatch and warning. I will make the corrections
in the next version.

> > --
> > The purpose of this patch is to separate the corrections for
> > MediaTek SPLIT CHECK_DTBS error from the original mailing list
> > mentioned below:
> > 
> https://lore.kernel.org/all/20240924103156.13119-2-macpaul.lin@mediatek.com/
> > 
> > Changes since v1:
> >   - Adding functional descriptions and quantity restrictions.
> > ---
> >  .../bindings/display/mediatek/mediatek,split.yaml           | 6
> ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git
> a/Documentation/devicetree/bindings/display/mediatek/mediatek,split.y
> aml
> b/Documentation/devicetree/bindings/display/mediatek/mediatek,split.y
> aml
> > index e4affc854f3d..bce1b8b866ce 100644
> > ---
> a/Documentation/devicetree/bindings/display/mediatek/mediatek,split.y
> aml
> > +++
> b/Documentation/devicetree/bindings/display/mediatek/mediatek,split.y
> aml
> > @@ -57,6 +57,9 @@ properties:
> >    clocks:
> >      items:
> >        - description: SPLIT Clock
> > +      - description: HDMI RX Clock
> > +      - description: HDMI Metadata Clock
> > +    minItems: 1
> >  
> >  required:
> >    - compatible
> > @@ -72,6 +75,9 @@ allOf:
> >              const: mediatek,mt8195-mdp3-split
> >  
> >      then:
> > +      properties:
> > +        clocks:
> 
> missing minItems
> 
> Missing constraints for all the variants.
> 

Does this mean that a 'maxItems:1' condition needs to be added for
mt8173 clock property under the 'allOf' seciton?

> Best regards,
> Krzysztof
> 

Sincerely,
Moudy Ho