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From: Daniel Thompson <daniel.thompson@linaro.org>
To: "Lothar Waßmann"
	<LW-bxm8fMRDkQLDiMYJYoSAnRvVK+yQ3ZXh@public.gmane.org>,
	"Bartlomiej Zolnierkiewicz"
	<b.zolnierkie-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
	"Jacek Anaszewski"
	<jacek.anaszewski-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	"Jingoo Han" <jingoohan1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	"Lee Jones" <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	"Mark Rutland" <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
	"Pavel Machek" <pavel-+ZI9xUNit7I@public.gmane.org>,
	"Richard Purdie"
	<rpurdie-Fm38FmjxZ/leoWH0uzbU5w@public.gmane.org>,
	"Rob Herring" <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	"Thierry Reding"
	<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-fbdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-leds-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-pwm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	"Enric Balletbo i Serra"
	<enric.balletbo-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
Subject: Re: [PATCH 0/2] backlight: pwm_bl: prevent backlight flicker when switching PWM on
Date: Wed, 08 Nov 2017 10:48:01 +0000	[thread overview]
Message-ID: <cec1af21-8a6d-f9f3-eaf0-197ba68d87ee@linaro.org> (raw)
In-Reply-To: <1509022186-19636-2-git-send-email-LW-bxm8fMRDkQLDiMYJYoSAnRvVK+yQ3ZXh@public.gmane.org>

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?



Daniel.

  parent reply	other threads:[~2017-11-08 10:48 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-26 12:49 [PATCH 0/2] backlight: pwm_bl: prevent backlight flicker when switching PWM on Lothar Waßmann
     [not found] ` <1509022186-19636-1-git-send-email-LW-bxm8fMRDkQLDiMYJYoSAnRvVK+yQ3ZXh@public.gmane.org>
2017-10-26 12:49   ` Lothar Waßmann
     [not found]     ` <1509022186-19636-2-git-send-email-LW-bxm8fMRDkQLDiMYJYoSAnRvVK+yQ3ZXh@public.gmane.org>
2017-11-08 10:48       ` Daniel Thompson [this message]
2017-11-10 11:22         ` Enric Balletbo i Serra
2017-11-14  7:56           ` Lothar Waßmann
2017-10-26 12:49   ` [PATCH 2/2] backlight: pwm_bl: add configurable delay between re-enabling PWM and switching backligh Lothar Waßmann
2017-10-27 14:38     ` [PATCH 2/2] backlight: pwm_bl: add configurable delay between re-enabling PWM and switching back 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
2017-10-26 12:49 ` [PATCH 1/2] backlight: pwm_bl: Enable PWM before switching regulator on Lothar Waßmann

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