linux-kernel - Re: [PATCH v2 04/11] dt-bindings: display: panel: Describe Samsung SOFEF01-M DDIC

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Message-ID: <CAD++jL=HDRAcwDVUeYUKFbamqVnOADqz5qpbSr1XVsr3M1iNoQ@mail.gmail.com>
Date: Fri, 26 Dec 2025 18:38:56 +0100
From: Linus Walleij <linusw@...nel.org>
To: Marijn Suijten <marijn.suijten@...ainline.org>
Cc: Neil Armstrong <neil.armstrong@...aro.org>, Sam Ravnborg <sam@...nborg.org>, 
	David Airlie <airlied@...il.com>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Andy Gross <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
	Jessica Zhang <jesszhan0024@...il.com>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, Simona Vetter <simona@...ll.ch>, 
	Casey Connolly <casey.connolly@...aro.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Simona Vetter <simona.vetter@...ll.ch>, 
	~postmarketos/upstreaming@...ts.sr.ht, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>, 
	Martin Botka <martin.botka@...ainline.org>, Jami Kettunen <jami.kettunen@...ainline.org>, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
	Abhinav Kumar <quic_abhinavk@...cinc.com>, Kuogee Hsieh <quic_khsieh@...cinc.com>, 
	Jessica Zhang <quic_jesszhan@...cinc.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
	Konrad Dybcio <konrad.dybcio@....qualcomm.com>, Konrad Dybcio <konradybcio@...nel.org>, 
	Dmitry Baryshkov <lumag@...nel.org>
Subject: Re: [PATCH v2 04/11] dt-bindings: display: panel: Describe Samsung
 SOFEF01-M DDIC

On Fri, Dec 26, 2025 at 2:48 PM Marijn Suijten
<marijn.suijten@...ainline.org> wrote:
> On 2025-12-26 14:25:04, Linus Walleij wrote:

> > They are clearly using the S0FEF01-M display controller.
>
> So you're implying or certain that these panel names here are always bundled
> with exactly the same controller (making the SOFEF01 part "redundant" in the
> compatible)?

Yes that's what I suspect.

See my comment in the driver that all s6e* panels are suspected to be
some s0fef00/1 variant.

> Also, divergence of the driver commands got significant with the last two panels
> / three phones, though that might be down to vendor configuration/calibration.

That's kind of normal. The defaults suffice for a while, then engineers
want to start poking at different voltages to the display to improve
and tweak things.

Yours,
Linus Walleij