linux-kernel - Re: [PATCH v2 03/15] dt-bindings: display: mediatek: merge: Add compatible for MT8188

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Date:   Fri, 16 Jun 2023 11:31:37 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Shawn Sung (宋孝謙) 
        <Shawn.Sung@...iatek.com>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "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>,
        Jason-JH Lin (林睿祥) 
        <Jason-JH.Lin@...iatek.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Nancy Lin (林欣螢) <Nancy.Lin@...iatek.com>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 03/15] dt-bindings: display: mediatek: merge: Add
 compatible for MT8188

On 16/06/2023 10:40, Shawn Sung (宋孝謙) wrote:
> On Fri, 2023-06-16 at 10:07 +0200, Krzysztof Kozlowski wrote:
>>  	 
>> External email : Please do not click links or open attachments until
>> you have verified the sender or the content.
>>  On 16/06/2023 07:29, Shawn Sung (宋孝謙) wrote:
>>> Hi Krzysztof,
>>>
>>> Thanks for the reminder, because MT8188 is not related to MT8173,
>>
>> How does it matter?
> 
> Because MT8188 Merge is fully compatible with MT8195, we didn't add its
> compatible name to the driver, but just list it in dt-bindings, and use
> MT8195's compatible name to match the ID in device table. For example,
> in mt8188.dtsi:
> 
> merge1: merge@...0c000 {
>         compatible = "mediatek,mt8188-disp-merge", "mediatek,mt8195-
> disp-merge";
>         ...
> };
> 
> If we add MT8188 Merge as an enum with MT8173, then our device tree
> must be as below, and nothing will match in Merge driver.
> 
> merge1: merge@...0c000 {
>         compatible = "mediatek,mt8188-disp-
> merge";
>         ...
> };

No, why? It would be incorrect with existing bindings. Again, on what
tree are you working?

> 
>>
>>>  I’ll
>>> keep it as it is for now, however, I do find that MT8195 doesn’t
>> exist
>>> in this dt-bindings which it should be, so there may be conflicts
>> when
>>> this series is going to be merged.
>>
>> Don't top post.
>>
>> No, rebase on current next and implement my comment.
> 
> Will rebase linux-next in the next version.

Rebase now - for this discussion.

Best regards,
Krzysztof