From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
To: "Daniel Thompson" <daniel.thompson@linaro.org>,
"Lothar Waßmann" <LW@KARO-electronics.de>,
"Bartlomiej Zolnierkiewicz" <b.zolnierkie@samsung.com>,
"Jacek Anaszewski" <jacek.anaszewski@gmail.com>,
"Jingoo Han" <jingoohan1@gmail.com>,
"Lee Jones" <lee.jones@linaro.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Pavel Machek" <pavel@ucw.cz>,
"Richard Purdie" <rpurdie@rpsys.net>,
"Rob Herring" <robh+dt@kernel.org>,
"Thierry Reding" <thierry.reding@gmail.com>,
devicetree@vger.kernel.org, linux-fbdev@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org,
linux-pwm@vger.kernel.org
Subject: Re: [PATCH 0/2] backlight: pwm_bl: prevent backlight flicker when switching PWM on
Date: Fri, 10 Nov 2017 12:22:15 +0100 [thread overview]
Message-ID: <8682e9c4-518d-5dce-55c5-c221dddd5fd6@collabora.com> (raw)
In-Reply-To: <cec1af21-8a6d-f9f3-eaf0-197ba68d87ee@linaro.org>
Hi all,
On 08/11/17 11:48, Daniel Thompson wrote:
> On 26/10/17 13:49, Lothar Waßmann wrote:
>> These patches implement some measures to prevent backlight flicker
>> when the backlight is being switched on for a display with an active
>> low brightness control pin.
>> GIT: [PATCH 1/2] backlight: pwm_bl: Enable PWM before switching regulator
>> GIT: [PATCH 2/2] backlight: pwm_bl: add configurable delay between
>
> Other than hoisting the pwm_enable() even earlier in the setup sequence this
> patchset seems to have a significant overlap with Enric's recent posting:
>
> https://lkml.org/lkml/2017/7/21/211
>
> Any chance of a shared view on this, especially on the DT bindings?
>
The DT binding were discussed some time ago for the patch series I sent, though
there isn't a final ack from DT maintainer.
Lothar, the series I sent have been reviewed and acked, can you test if the
series fixes the problem for you too?
Thanks,
Enric
>
>
> Daniel.
next prev parent reply other threads:[~2017-11-10 11:22 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-26 12:49 Lothar Waßmann
2017-10-26 12:49 ` Lothar Waßmann
2017-11-08 10:48 ` Daniel Thompson
2017-11-10 11:22 ` Enric Balletbo i Serra [this message]
2017-11-14 7:56 ` Lothar Waßmann
2017-10-26 12:49 ` [PATCH 1/2] backlight: pwm_bl: Enable PWM before switching regulator on Lothar Waßmann
2017-10-26 12:49 ` [PATCH 2/2] backlight: pwm_bl: add configurable delay between re-enabling PWM and switching backlight power on Lothar Waßmann
2017-10-27 14:38 ` Rob Herring
2017-10-30 10:33 ` Lee Jones
2017-11-08 0:46 ` Rob Herring
2017-11-08 7:34 ` Lothar Waßmann
2017-11-08 9:12 ` Lee Jones
2017-11-08 9:44 ` Lothar Waßmann
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