From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Thompson <daniel.thompson@linaro.org>
Date: Thu, 20 Apr 2017 09:55:34 +0000
Subject: Re: [PATCH] backlight: pwm_bl: Fix condition to set enable gpio as output
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To: Paul Kocialkowski <contact-W9ppeneeCTY@public.gmane.org>, Geert Uytterhoeven <geert-Td1EMuHUCqxL1ZNQvxDV9g@public.gmane.org>
Cc: "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Thierry Reding <thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>, Jingoo Han <jingoohan1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Bartlomiej Zolnierkiewicz <b.zolnierkie-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>, Linux PWM List <linux-pwm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Linux Fbdev development list <linux-fbdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

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@paulk.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@paulk.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@paulk.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).


Daniel.