linux-kernel - Re: [PATCH] backlight: pwm_bl: Fix condition to set enable gpio as output

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Message-ID: <1492443526.12267.4.camel@paulk.fr>
Date:   Mon, 17 Apr 2017 17:38:46 +0200
From:   Paul Kocialkowski <contact@...lk.fr>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Linux PWM List <linux-pwm@...r.kernel.org>,
        Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH] backlight: pwm_bl: Fix condition to set enable gpio as
 output

Hi,

Le dimanche 16 avril 2017 à 22:55 +0200, Geert Uytterhoeven a écrit :
> On Sun, Apr 16, 2017 at 12:35 PM, Paul Kocialkowski <contact@...lk.fr> wrote:
> > The move to a dedicated pwm_backlight_initial_power_state function in
> > commit 7613c922315e308a6486d802abed2eb74443dffd modified the condition
> > to set the enable gpio as output. This breaks specific use cases using
> > that GPIO, such as tegra124-based nyan Chromebooks where backlight
> > stopped working.
> > 
> > This puts the condition back to the way it was before the move.
> > 
> > Signed-off-by: Paul Kocialkowski <contact@...lk.fr>
> 
> Does "[PATCH v2] backlight: pwm_bl: Fix GPIO out for unimplemented
> .get_direction()"
> (https://lkml.org/lkml/2017/4/4/225) fix your issue?

This definitely solves the issue!

Since this fixes broken backlight (that, in turn, makes systems unusable),
perhaps this should be included in the next rc cycle?

Cheers!

-- 
Paul Kocialkowski, developer of free digital technology at the lower levels

Website: https://www.paulk.fr/
Coding blog: https://code.paulk.fr/
Git repositories: https://git.paulk.fr/ https://git.code.paulk.fr/
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