linux-kernel - Re: [PATCH v2 1/2] dt-bindings: display: panel: Add Novatek NT36523 bindings

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Date:   Wed, 8 Mar 2023 08:29:28 +0800
From:   Jianhua Lu <lujianhua000@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: display: panel: Add Novatek NT36523
 bindings

On Tue, Mar 07, 2023 at 11:22:35PM +0100, Linus Walleij wrote:
> On Mon, Feb 20, 2023 at 1:13 PM Jianhua Lu <lujianhua000@...il.com> wrote:
> 
> > Novatek NT36523 is a display driver IC used to drive DSI panels.
> >
> > Signed-off-by: Jianhua Lu <lujianhua000@...il.com>
> > ---
> > Changes in v2:
> >   - Drop unnecessary description
> >   - dsi0 -> dsi
> >   - Correct indentation
> 
> I'd like Konrad and Neil to look at this before we merge it.
> 
> > +required:
> > +  - compatible
> > +  - reg
> > +  - vddio-supply
> > +  - vddpos-supply
> > +  - vddneg-supply
> 
> It appears vddpos and vddneg are not necessary on
> all variants, can they be made non-required?
It can be non-required, this panel's positive regulator and negative
regulator are supplied by backlight IC, the both regulator of Konrad's
NT36523W panel are supplied by secure firmware layer.
> 
> It is also possible to do some - if -construction of course
> based on the compatible, if we want to be fancy.
> 
> Yours,
> Linus Walleij