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acer-wmi: Respect framebuffer blanking in backlight

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If the framebuffer has requested blanking, turn the backlight down. Also
offer the user the option to do this.

Reported-by: Michal Pecio <michal.pecio@gmail.com>
Signed-off-by: Carlos Corbacho <carlos@strangeworlds.co.uk>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
This commit is contained in:
Carlos Corbacho 2008-06-21 09:09:27 +01:00 committed by Andi Kleen
parent 9991d9f2bc
commit f2b585b4a3
1 changed files with 12 additions and 2 deletions
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14
drivers/misc/acer-wmi.c
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@ -29,6 +29,7 @@
#include <linux/init.h>
#include <linux/types.h>
#include <linux/dmi.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
@ -830,7 +831,15 @@ static int read_brightness(struct backlight_device *bd)
static int update_bl_status(struct backlight_device *bd)
{
set_u32(bd->props.brightness, ACER_CAP_BRIGHTNESS);
int intensity = bd->props.brightness;
if (bd->props.power != FB_BLANK_UNBLANK)
intensity = 0;
if (bd->props.fb_blank != FB_BLANK_UNBLANK)
intensity = 0;
set_u32(intensity, ACER_CAP_BRIGHTNESS);
return 0;
}
@ -852,8 +861,9 @@ static int __devinit acer_backlight_init(struct device *dev)
acer_backlight_device = bd;
bd->props.power = FB_BLANK_UNBLANK;
bd->props.brightness = max_brightness;
bd->props.max_brightness = max_brightness;
bd->props.brightness = read_brightness(NULL);
backlight_update_status(bd);
return 0;
}