linux-kernel - Re: [PATCH v4 4/8] drm/panel: sw43408: Add enable/disable and reset functions

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Message-ID: <c3022e57-1cc4-4805-94ba-d98e2016ee80@ixit.cz>
Date: Sat, 6 Dec 2025 14:27:40 +0100
From: David Heidelberg <david@...t.cz>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Sumit Semwal <sumit.semwal@...aro.org>,
 Casey Connolly <casey.connolly@...aro.org>,
 Neil Armstrong <neil.armstrong@...aro.org>,
 Jessica Zhang <jesszhan0024@...il.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>,
 Marijn Suijten <marijn.suijten@...ainline.org>,
 Dmitry Baryshkov <lumag@...nel.org>, Vinod Koul <vkoul@...nel.org>,
 phodina@...tonmail.com, linux-arm-msm@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 phone-devel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v4 4/8] drm/panel: sw43408: Add enable/disable and reset
 functions

On 06/12/2025 05:25, Dmitry Baryshkov wrote:
> On Tue, Nov 25, 2025 at 09:29:39PM +0100, David Heidelberg via B4 Relay wrote:
>> From: David Heidelberg <david@...t.cz>
>>
>> Introduce enable(), disable() and reset() functions.
>>
>> The enable() and disable() callbacks keep the symmetry in the commands
>> sent to the panel and also make a clearer distinction between panel
>> initialization and configuration.
> 
> This also makes those to to be executed after starting the DSI stream.
> Is it fine?
> 

Yes, the panel works same way as before without patchset.
Still not recovering from panel off, we tried to debug, not there yet, 
but the sequences are verified to work fine).

Reset sequence or/and regulators may not be correct enough to recover.

I'm sending another series with moved _enable function and all R-Bs.

David

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