linux-kernel - Re: [PATCH 1/3] dt-bindings: display: panel: samsung,atna45dc02: Document ATNA45DC02

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Message-ID: <CAD=FV=VURWwyLB-VZEpB3JNt-ODyxWtXZnV33GA7JkP5AGgN-A@mail.gmail.com>
Date: Thu, 18 Jul 2024 16:09:27 -0700
From: Doug Anderson <dianders@...omium.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Rob Clark <robdclark@...il.com>, linux-arm-msm@...r.kernel.org, 
	Abel Vesa <abel.vesa@...aro.org>, Rob Clark <robdclark@...omium.org>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Jessica Zhang <quic_jesszhan@...cinc.com>, 
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	"open list:DRM PANEL DRIVERS" <dri-devel@...ts.freedesktop.org>, 
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] dt-bindings: display: panel: samsung,atna45dc02:
 Document ATNA45DC02

Hi,

On Thu, Jul 18, 2024 at 2:36 PM Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
>
> On Thu, Jul 18, 2024 at 11:44:32AM GMT, Rob Clark wrote:
> > From: Rob Clark <robdclark@...omium.org>
> >
> > The Samsung ATNA45DC02 panel is an AMOLED eDP panel, similar to the
> > existing ATNA45AF01 and ATNA33XC20 panel but with a higher resolution.
> >
> > Signed-off-by: Rob Clark <robdclark@...omium.org>
> > ---
> >  .../devicetree/bindings/display/panel/samsung,atna33xc20.yaml   | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/display/panel/samsung,atna33xc20.yaml b/Documentation/devicetree/bindings/display/panel/samsung,atna33xc20.yaml
> > index d668e8d0d296..284a4ee79bbf 100644
> > --- a/Documentation/devicetree/bindings/display/panel/samsung,atna33xc20.yaml
> > +++ b/Documentation/devicetree/bindings/display/panel/samsung,atna33xc20.yaml
> > @@ -19,6 +19,8 @@ properties:
> >        - samsung,atna33xc20
> >        # Samsung 14.5" WQXGA+ (2880x1800 pixels) eDP AMOLED panel
> >        - samsung,atna45af01
> > +      # Samsung 14.5" 3K (2944x1840 pixels) eDP AMOLED panel
> > +      - samsung,atna45dc02

Please follow what we decided in Stephan Gerhold's case and use a
fallback compatible. In other words: your patch seems to be based on
his v1 and not his v2.

> This makes me wonder if we should define a cover compatible like
> samsung,amoled-edp-panel.

I will bow to the wisdom of the DT folks, but my understanding is that
we shouldn't do that. The fallback compatible can just be the
compatible of the first panel that we supported that used the same
interface.

-Doug