linux-kernel - Re: [PATCH v7 02/16] dt-bindings: media: mediatek: mdp3: merge the indentical RDMA under display

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Message-ID: <324f170c69387c5587688ae7bee5ddf95bc94576.camel@mediatek.com>
Date:   Wed, 18 Oct 2023 03:06:55 +0000
From:   Moudy Ho (何宗原) <Moudy.Ho@...iatek.com>
To:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "krzysztof.kozlowski@...aro.org" <krzysztof.kozlowski@...aro.org>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "conor+dt@...nel.org" <conor+dt@...nel.org>,
        "hverkuil-cisco@...all.nl" <hverkuil-cisco@...all.nl>,
        "airlied@...il.com" <airlied@...il.com>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>
CC:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v7 02/16] dt-bindings: media: mediatek: mdp3: merge the
 indentical RDMA under display

On Fri, 2023-10-13 at 08:46 +0200, Krzysztof Kozlowski wrote:
>  	 

Hi Krzysztof,

Thank you for assisting with the review.

> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  On 12/10/2023 10:40, Moudy Ho wrote:
> 
> >  
> > +allOf:
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          contains:
> > +            const: mediatek,mt8183-mdp3-rdma
> > +
> > +    then:
> > +      properties:
> > +        clocks:
> > +          items:
> > +            - description: RDMA clock
> > +            - description: RSZ clock (shared SRAM with RDMA)
> > +
> > +        mboxes:
> > +          items:
> > +            - description: used for 1st data pipe from RDMA
> > +            - description: used for 2nd data pipe from RDMA
> 
> interrupts:
>   false
> 

As Angelo provided additional clarification in [15/16], explaining that
certain conditions in [2/16] and [3/16] were intentionally omitted due
to the need to integrate the same IP with different operations.
Apologies for any inconvenience this has caused you.

> > +
> > +      required:
> > +        - mboxes
> > +        - mediatek,gce-events
> > +
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          contains:
> > +            const: mediatek,mt8195-vdo1-rdma
> > +
> > +    then:
> > +      properties:
> > +        clocks:
> > +          items:
> > +            - description: RDMA clock
> 
> mboxes: false
> mediatek,gce-events: false
> 
> I am not so sure it is actually "simpler" to merge these. They are
> quite
> different. You will end up with unmanageable allOf  with a lot of
> branches (which supposedly you want to remove).
> 
> 

Upon examining the minor hardware changes in MDP for MT8183 and MT8195
RDMA ([3/16]), it appears that branching cannot be avoided. However,
consolidating these changes has the additional advantage of addressing
Rob's concerns from v4. Perhaps we can consider the current changes as
a form of progress.

Sincerely,
Moudy

> > +
> >  additionalProperties: false
> >  
> >  examples:
> 
> Best regards,
> Krzysztof
>