linux-kernel - Re: [PATCH 01/12] dt-bindings: panel: Add Samsung SOFEF00 DDIC with panel

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Message-ID: <108b8631-6d92-4b2f-a59d-3c9e0c607e5d@kernel.org>
Date: Fri, 7 Nov 2025 12:27:43 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Neil Armstrong <neil.armstrong@...aro.org>,
 David Heidelberg <david@...t.cz>
Cc: 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 01/12] dt-bindings: panel: Add Samsung SOFEF00 DDIC with
 panel

On 07/11/2025 12:23, Neil Armstrong wrote:
> On 11/6/25 09:48, Krzysztof Kozlowski wrote:
>> On Tue, Nov 04, 2025 at 11:16:09PM +0100, David Heidelberg wrote:
>>> Basic description for S6E3FC2X01 DDIC with attached panels
>>>
>>>   - Samsung AMS601NT22 6.01 inch, 1080x2160 pixels, 18:9 ratio
>>>   - Samsung AMS628NW01 6.28 inch, 1080x2280 pixels, 19:9 ratio
>>>
>>> This panel has three supplies, while panel-simple-dsi is limited to one.
>>> There is no user of this compatible, nor the compatible make sense.
>>
>> There are. git grep samsung,sofef00, gives me two users.
> 
> Hmm, on -next I only see a single one:
> 
> $ grep samsung,sofef00 arch/*/boot/dts/ -R
> arch/arm64/boot/dts/qcom/sdm845-oneplus-enchilada.dts:  compatible = "samsung,sofef00";
> 

These are the users:

arch/arm64/boot/dts/qcom/sdm845-oneplus-enchilada.dts
drivers/gpu/drm/panel/panel-samsung-sofef00.c

>>
>>> Remove it from simple DSI panel definitions.
> 
> Can't you mark is deprecated at first ?

Not sure what would be the benefit here. There is no negative ABI impact
here.

Best regards,
Krzysztof