backlight/acpi: Update the backlight state when we change brightness
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@redhat.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 60ea984..5845398 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1960,6 +1960,10 @@
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");