[PATCH 2/3] ACPI: Update the backlight state when we change brightness

From: Matthew Garrett
Date: Tue Jul 14 2009 - 12:06:35 EST


Trigger a status update when we change the brightness in the driver, thus
allowing userspace to present appropriate UI.

Signed-off-by: Matthew Garrett <mjg@xxxxxxxxxx>
---
drivers/acpi/video.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 8851315..2c906c7 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1960,6 +1960,10 @@ acpi_video_switch_brightness(struct acpi_video_device *device, int event)

result = acpi_video_device_lcd_set_level(device, level_next);

+ if (!result)
+ backlight_force_update(device->backlight,
+ BACKLIGHT_UPDATE_HOTKEY);
+
out:
if (result)
printk(KERN_ERR PREFIX "Failed to switch the brightness\n");
--
1.6.2.5

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