linux-kernel - Re: [PATCH v2 1/7] dt-bindings: panel: Add Samsung S6E3FC2X01 DDIC with panel

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Message-ID: <bmsxmwfdwx7wlmngaqpvz7c2nudcoukspkxgq6zqh2mdlolfxg@fsdbafotp5q2>
Date: Thu, 9 Oct 2025 16:21:04 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Cc: david@...t.cz, Neil Armstrong <neil.armstrong@...aro.org>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        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>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Casey Connolly <casey.connolly@...aro.org>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        phone-devel@...r.kernel.org
Subject: Re: [PATCH v2 1/7] dt-bindings: panel: Add Samsung S6E3FC2X01 DDIC
 with panel

On Thu, Oct 09, 2025 at 10:51:31AM +0200, Konrad Dybcio wrote:
> On 10/8/25 8:57 PM, Dmitry Baryshkov wrote:
> > On Wed, Oct 08, 2025 at 04:05:28PM +0200, David Heidelberg via B4 Relay wrote:
> >> From: David Heidelberg <david@...t.cz>
> >>
> >> Basic description for S6E3FC2X01 DDIC with attached panel AMS641RW.
> >>
> >> Samsung AMS641RW is 6.41 inch, 1080x2340 pixels, 19.5:9 ratio panel
> >>
> >> Signed-off-by: David Heidelberg <david@...t.cz>
> >> ---
> >>  .../bindings/display/panel/samsung,s6e3fc2x01.yaml | 78 ++++++++++++++++++++++
> >>  MAINTAINERS                                        |  5 ++
> >>  2 files changed, 83 insertions(+)
> >>
> > 
> > Please also describe, why it's not enough to use defined compatible,
> > samsung,s6e3fc2x01. Why do we need a separate schema and can't use the
> > panel-simple-dsi.yaml
> 
> panel-simple works for 'dumb' (perhaps a harsh word for 'made with
> just the in-spec DCS commands in mind') panels, but Samsungs are
> widely known to require a ton of vendor magic

The question is about the _schema_. I think it's fine to have a driver
for a panel covered by panel-simple-dsi.yaml.

> 
> Perhaps the original change was made with an "oh it just works
> surely there's no drawbacks possible" attitude, as the panel
> was left initialized by the bootloader

-- 
With best wishes
Dmitry