Improve the backlight code to emulate as much as possible the power
management events, as we are unable to really power on or power off the
backlight.
Signed-off-by: Henrique de Moraes Holschuh <hmh@xxxxxxxxxx>
Acked-by: Richard Purdie <rpurdie@xxxxxxxxx>
---
Len, I have added this to the for-upstream/acpi-test branch
of git://repo.or.cz/linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git
for when you pull it.
drivers/acpi/ibm_acpi.c | 5 ++++-
drivers/acpi/ibm_acpi.h | 1 +
2 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/acpi/ibm_acpi.c b/drivers/acpi/ibm_acpi.c
index dd36be0..6573d01 100644
--- a/drivers/acpi/ibm_acpi.c
+++ b/drivers/acpi/ibm_acpi.c
@@ -1664,7 +1664,10 @@ static void brightness_exit(void)
static int brightness_update_status(struct backlight_device *bd)
{
- return brightness_set(bd->props.brightness);
+ return brightness_set(
+ (bd->props.fb_blank == FB_BLANK_UNBLANK &&
+ bd->props.power == FB_BLANK_UNBLANK) ?
+ bd->props.brightness : 0);
}
static int brightness_get(struct backlight_device *bd)
diff --git a/drivers/acpi/ibm_acpi.h b/drivers/acpi/ibm_acpi.h
index 4d0387a..b63c014 100644
--- a/drivers/acpi/ibm_acpi.h
+++ b/drivers/acpi/ibm_acpi.h
@@ -32,6 +32,7 @@
#include <linux/proc_fs.h>
#include <linux/backlight.h>
+#include <linux/fb.h>
#include <asm/uaccess.h>
#include <linux/dmi.h>
--
1.5.0.1
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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