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Re: [PATCH v4] pwm-backlight: Avoid backlight flicker when probed from DT

From Heiko Stuebner <heiko@sntech.de>
Newsgroups linux.kernel
Subject Re: [PATCH v4] pwm-backlight: Avoid backlight flicker when probed from DT
Date 2015-11-10 15:20 +0100
Message-ID <qthWa-68s-15@gated-at.bofh.it> (permalink)
References <qqqCD-7HK-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

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Hi Philipp,

Am Montag, 2. November 2015, 17:55:56 schrieb Philipp Zabel:
> If the driver is probed from the device tree, and there is a phandle
> property set on it, and the enable GPIO is already configured as output,
> and the backlight is currently disabled, keep it disabled.
> If all these conditions are met, assume there will be some other driver
> that can enable the backlight at the appropriate time.
> 
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
> Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>

this patch improves the white screen when booting a veyron chromebook
a lot. I still see a small white flash, but that can probably come from
the WIP edp driver.

Tested-by: Heiko Stuebner <heiko@sntech.de>
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Thread

[PATCH v4] pwm-backlight: Avoid backlight flicker when probed from DT Philipp Zabel <p.zabel@pengutronix.de> - 2015-11-02 18:00 +0100
  Re: [PATCH v4] pwm-backlight: Avoid backlight flicker when probed from DT Heiko Stuebner <heiko@sntech.de> - 2015-11-10 15:20 +0100
    Re: [PATCH v4] pwm-backlight: Avoid backlight flicker when probed  from DT Thierry Reding <thierry.reding@gmail.com> - 2015-11-10 18:40 +0100

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