linux-kernel - Re: [PATCH v2] pwm-backlight: allow for non-increasing brightness levels

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Message-ID: <20130926115108.GA1680@ulmo>
Date:	Thu, 26 Sep 2013 13:51:09 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Tomi Valkeinen <tomi.valkeinen@...com>,
	Jingoo Han <jg1.han@...sung.com>
Cc:	Mike Dunn <mikedunn@...sguy.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	linux-pwm@...r.kernel.org, linux-fbdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Marek Vasut <marex@...x.de>
Subject: Re: [PATCH v2] pwm-backlight: allow for non-increasing brightness
 levels

On Thu, Sep 26, 2013 at 01:03:06PM +0300, Tomi Valkeinen wrote:
[...]
> But if you and Thierry think this version is good, I'll take it.

That sounds like you want to take it through the fbdev tree. Jingoo is
listed (along with Richard, but he hasn't been responsive to email for
years) as maintainer for the backlight subsystem. Furthermore back at
the time when I began working on the PWM subsystem, the backlight sub-
system was pretty much orphaned, and pwm-backlight was by far the
biggest user of the PWM subsystem. I adopted the driver at the time
because it needed to be updated for PWM subsystem changes.

What's the plan going forward? Given the coupling between the PWM
subsystem and the pwm-backlight driver it might be useful to keep
maintaining it as part of the PWM subsystem. On the other hand, there's
some coupling between the driver and the backlight subsystem too.

I have a couple of patches queued up for 3.13 that rework parts of the
driver, so it'd be good to know how you guys want to handle this.

Thierry

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