From: Zhang Rui <rui.zhang@intel.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: "linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>
Subject: Re: ACPI_VIDEO and BACKLIGHT_CLASS_DEVICE
Date: Fri, 12 Nov 2010 10:07:07 +0800 [thread overview]
Message-ID: <1289527627.8148.1462.camel@rui> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1011101646240.1587-100000@iolanthe.rowland.org>
On Thu, 2010-11-11 at 06:02 +0800, Alan Stern wrote:
> Rui:
>
> Why does CONFIG_ACPI_VIDEO depend on BACKLIGHT_CLASS_DEVICE? Doesn't
> ACPI_VIDEO apply to any sort of video adapter, including plain old VGA
> adapters attached to a non-LCD device?
>
There is an ACPI device node (an ACPI video bus device) for the VGA
controller and another ACPI device node (an ACPI video output device)
for the LCD display.
And ACPI_VIDEO knows how to switch the backlight of this integrated
LCD. :)
thanks,
rui
next prev parent reply other threads:[~2010-11-12 2:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-10 22:02 ACPI_VIDEO and BACKLIGHT_CLASS_DEVICE Alan Stern
2010-11-12 2:07 ` Zhang Rui [this message]
2010-11-12 3:00 ` Alan Stern
2010-11-12 3:46 ` Matthew Garrett
2010-11-12 21:26 ` Alan Stern
2010-11-12 21:36 ` Matthew Garrett
2010-11-15 0:33 ` Zhang Rui
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1289527627.8148.1462.camel@rui \
--to=rui.zhang@intel.com \
--cc=linux-acpi@vger.kernel.org \
--cc=stern@rowland.harvard.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox