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

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Date:   Sat, 22 Apr 2017 15:00:35 +0200
From:   Paul Kocialkowski <contact@...lk.fr>
To:     Daniel Thompson <daniel.thompson@...aro.org>,
        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>,
        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 jeudi 20 avril 2017 à 10:55 +0100, Daniel Thompson a écrit :
> On 18/04/17 09:46, Paul Kocialkowski wrote:
> > Hi,
> > 
> > Le lundi 17 avril 2017 à 21:36 +0200, Geert Uytterhoeven a écrit :
> > > On Mon, Apr 17, 2017 at 5:38 PM, Paul Kocialkowski <contact@...lk.fr>
> > > wrote:
> > > > 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?
> > > 
> > > You mean v4.11 final, as there probably won't be another rc?
> > > Yes!
> > 
> > I'm all for it!
> 
> Thanks for keeping our attention on this. I sent a PR yesterday (and 
> hope my GPG key has attracted enough signatures).

Thanks for acting fast and getting this merged already. This is greatly
appreciated!

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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