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 11:51:50 +0000
From:   Shawn Sung (宋孝謙) 
        <Shawn.Sung@...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>,
        "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 Fri, 2023-06-16 at 11:31 +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 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?

Just sent a v3 that is based on next-20230616 tag of linux-next/master
branch. After checking, still not sure what is the difference between
this modification and the others in mdp-rdma and ethdr. Could you share
more information please? 

> 
> > 
> >>
> >>>  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.

Done. Please refer to v3.

> 
> Best regards,
> Krzysztof
> 

Thanks,
Hsiao Chien Sung