linux-kernel - Re: Display class

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Message-Id: <20061206105724.cf7b39bc.randy.dunlap@oracle.com>
Date:	Wed, 6 Dec 2006 10:57:24 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	James Simmons <jsimmons@...radead.org>
Cc:	Miguel Ojeda <maxextreme@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Fbdev development list 
	<linux-fbdev-devel@...ts.sourceforge.net>,
	Luming Yu <Luming.yu@...el.com>,
	Andrew Zabolotny <zap@...elink.ru>, linux-acpi@...r.kernel.org,
	kernel-discuss@...dhelds.org
Subject: Re: Display class

On Wed, 6 Dec 2006 18:24:08 +0000 (GMT) James Simmons wrote:

> 
> > > That patch was rought draft for feedback. I applied your comments. This 
> > > patch actually works. It includes my backlight fix as well.
> > 
> > Glad to hear it.  I had to make the following changes
> > in order for it to build.
> > However, I still have build errors for aty.
> 
> Ug. I see another problem. I had backlight completly compiled as a 
> module! Thus it hid these compile errors. So we need also a 
> CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE check as well. Can sysfs handle this 
> well or would it be better the the backlight class be a boolean instead?

SCSI works as a module and it uses sysfs.
See drivers/scsi/scsi_sysfs.c.
Does that answer your question?  I wasn't quite sure what
the question was.

Next question, based on:
drivers/built-in.o: In function `probe_edid':
(.text.probe_edid+0x42): undefined reference to `fb_edid_to_monspecs'

Should backlight and/or display support depend on
CONFIG_FB?  Right now they don't, so the above can happen...

---
~Randy
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