Started by Rhee, C. Joon on Mar 13, 2008 · 2 messages from 2 authors · Last reply Mar 13, 2008
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R Rhee, C. Joon #
Hi, I'm searching for how we can specify the LCD backlight level through /dev/fb. And for this, should we introduce a new IOCTL? FBIOGET/SET_BACKLIGHT I looked through CONFIG_FB_BACKLIGHT and bl_dev registration but I found this is more of internal usage when there is fb event and I don't really see how user app can specify the level.
A Andres Salomon replied to Rhee, C. Joon #
On Thu, 13 Mar 2008 09:38:51 -0700 "Rhee, C. Joon" [off-list ref] wrote:
Hi, I'm searching for how we can specify the LCD backlight level through /dev/fb. And for this, should we introduce a new IOCTL? FBIOGET/SET_BACKLIGHT I looked through CONFIG_FB_BACKLIGHT and bl_dev registration but I found this is more of internal usage when there is fb event and I don't really see how user app can specify the level.
backlight_device_register() takes a struct backlight_ops that has callbacks for getting and setting the backlight. This ends up being exported via sysfs, and is a nice way to adjust the backlight. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/