linux-kernel - Re: [PATCH] backlight: pwm_bl: apply the initial backlight state with sane defaults

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Message-ID: <079e6431-7f8d-4d92-a2f6-b5a5e64d25f4@sirena.org.uk>
Date: Tue, 25 Nov 2025 12:36:20 +0000
From: Mark Brown <broonie@...nel.org>
To: Daniel Thompson <daniel@...cstar.com>
Cc: Michael Grzeschik <mgr@...gutronix.de>,
	Daniel Thompson <danielt@...nel.org>, linux-pwm@...r.kernel.org,
	linux-fbdev@...r.kernel.org, Jingoo Han <jingoohan1@...il.com>,
	Helge Deller <deller@....de>, Lee Jones <lee@...nel.org>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	Uwe Kleine-König <ukleinek@...nel.org>,
	Pengutronix <kernel@...gutronix.de>
Subject: Re: [PATCH] backlight: pwm_bl: apply the initial backlight state
 with sane defaults

On Tue, Nov 25, 2025 at 11:34:18AM +0000, Daniel Thompson wrote:
> On Tue, Nov 25, 2025 at 09:24:26AM +0100, Michael Grzeschik wrote:
> > On Tue, Nov 18, 2025 at 12:52:14PM +0000, Daniel Thompson wrote:

> > > Should we back out the patch for now?

> > I would be fine with that. But actually I would like to see the
> > proof that without the patch, this backtrace will not trigger.
> > Looking through the codepath, I could not directly find a case
> > where this should happen.

...

> > Mark, is there a way to rerun this without my patch?

> I have to admit I thought this was why Mark provided a bisect log!

Yeah, there should be a before and after for applying the patch in the
bisect log otherwise it wouldn't have got a result out.

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