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bd->props.brightness doesn't reflect the actual backlight level. 

Always invoke backlight_update_status when users want to change
the backlight.

For setups where brightness change is an expensive operation,
this could be done in the driver rather than the core.

http://bugzilla.kernel.org/show_bug.cgi?id=12249

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
This commit is contained in:
Zhang Rui 2009-01-08 14:11:30 +00:00 committed by Richard Purdie
parent 0ec561f4b6
commit 9be1df98bc
1 changed files with 2 additions and 4 deletions
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6
drivers/video/backlight/backlight.c
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@ -131,10 +131,8 @@ static ssize_t backlight_store_brightness(struct device *dev,
else {
pr_debug("backlight: set brightness to %lu\n",
brightness);
if (bd->props.brightness != brightness) {
bd->props.brightness = brightness;
backlight_update_status(bd);
}
bd->props.brightness = brightness;
backlight_update_status(bd);
rc = count;
}
}