linux-kernel - Re: [PATCH v4 2/9] dt-bindings: display: add verisilicon,dc

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Message-ID: <ba505a137370377e55316605827b51a2454b023e.camel@icenowy.me>
Date: Tue, 13 Jan 2026 21:41:30 +0800
From: Icenowy Zheng <uwu@...nowy.me>
To: Rob Herring <robh@...nel.org>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard
 <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, David Airlie
 <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Drew Fustini
 <fustini@...nel.org>, Guo Ren <guoren@...nel.org>, Fu Wei
 <wefu@...hat.com>,  Philipp Zabel <p.zabel@...gutronix.de>, Heiko Stuebner
 <heiko@...ech.de>, Andrzej Hajda <andrzej.hajda@...el.com>, Neil Armstrong
 <neil.armstrong@...aro.org>,  Robert Foss <rfoss@...nel.org>, Laurent
 Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman
 <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, Michal
 Wilczynski <m.wilczynski@...sung.com>, Han Gao <rabenda.cn@...il.com>, Yao
 Zi <ziyao@...root.org>, dri-devel@...ts.freedesktop.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v4 2/9] dt-bindings: display: add verisilicon,dc

在 2026-01-05星期一的 10:20 -0600，Rob Herring写道：
========== 8< ==============
> > > > +        ports:
> > > > +          required:
> > > > +            - port@0
> > > > +            - port@1
> > > 
> > > It is valid to omit these if the output is present, but unused.
> > 
> > Well this sounds reasonable, although my driver does not play well
> > if
> > only a port@1 is defined w/o port@0 .
> 
> Sounds like your driver should be fixed.

After this requirement is dropped, should the unconnected port@0 also
be removed from the DT example?

> 
> > Considering the previous two snippets, should I just remove this if
> > part?
> 
> I would, yes.
> 
> Rob