[PATCH 04/10] asus-acpi: fingers off backlight if video.ko is serving this functionality

[Andy Whitcroft]

From: Thomas Renninger <trenn at suse.de>

Bug: #257827
commit 6766fec3669d5053b987e111afb348b885237bfc upstream

Signed-off-by: Thomas Renninger <trenn at suse.de>
Acked-by: Zhang Rui <rui.zhang at intel.com>
Signed-off-by: Andi Kleen <ak at linux.intel.com>
Signed-off-by: Len Brown <len.brown at intel.com>
Signed-off-by: Andy Whitcroft <apw at canonical.com>
---
 drivers/misc/asus-laptop.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/asus-laptop.c b/drivers/misc/asus-laptop.c
index 7c6dfd0..a9a823b 100644
--- a/drivers/misc/asus-laptop.c
+++ b/drivers/misc/asus-laptop.c
@@ -1207,9 +1207,13 @@ static int __init asus_laptop_init(void)
 
 	dev = acpi_get_physical_device(hotk->device->handle);
 
-	result = asus_backlight_init(dev);
-	if (result)
-		goto fail_backlight;
+	if (!acpi_video_backlight_support()) {
+		result = asus_backlight_init(dev);
+		if (result)
+			goto fail_backlight;
+	} else
+		printk(ASUS_INFO "Brightness ignored, must be controlled by "
+		       "ACPI video driver\n");
 
 	result = asus_led_init(dev);
 	if (result)
-- 
1.6.0.4.911.gc990