linux-kernel - Re: [PATCH v2 3/5] drm: panel: Add a panel driver for the Summit display

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Message-ID: <CAMT+MTTOeyAKUDYYwN+hO_QVBhPK4w7cktx5LQyrxrfDTq-wcw@mail.gmail.com>
Date: Sun, 12 Jan 2025 21:27:00 +0100
From: Sasha Finkelstein <fnkl.kernel@...il.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Hector Martin <marcan@...can.st>, Sven Peter <sven@...npeter.dev>, 
	Alyssa Rosenzweig <alyssa@...enzweig.io>, 
	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>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Jessica Zhang <quic_jesszhan@...cinc.com>, 
	asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Nick Chan <towinchenmi@...il.com>
Subject: Re: [PATCH v2 3/5] drm: panel: Add a panel driver for the Summit display

On Sat, 30 Nov 2024 at 12:36, Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
> Please add BL_CORE_SUSPENDRESUME option to the backlight device.
> But interestingly enough, none of the panels set that flag.

It appears that setting that option re-orders something in the resume process
in such a way that the entire display locks up and becomes unusable until
the machine is rebooted. I will be sending v3 without this change.