linux-kernel - Re: [patch] added brightness feature to lcd class.

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Message-ID: <20091107164830.GA1586@ucw.cz>
Date:	Sat, 7 Nov 2009 17:48:30 +0100
From:	Pavel Machek <pavel@....cz>
To:	InKi Dae <daeinki@...il.com>
Cc:	linux-fbdev-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, Kyungmin Park <kmpark@...radead.org>
Subject: Re: [patch] added brightness feature to lcd class.

On Sat 2009-11-07 21:43:50, InKi Dae wrote:
> Thank you for your comments.
> 
> using backlight is good way in case of TFT-LCD Panel.
> because TFT-LCD Panel needs backlight device to light up.
> 
> but AMOLED LCD Panel doesn't need backlight device because lighting up itself.

I know. So what?

User wants to set brightness. Why should userspace know/care if it is
TFT or AMOLED?

I have this script:

#!/bin/bash
echo $1 > /sys/class/backlight/*/brightness 

why should I have to rewrite it just because you decided amoled is
special?

Kernel is expected to provide hw abstraction...

									Pavel

									
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