[PATCH 03/11] Acer-WMI: fingers off backlight if video.ko is serving this functionality

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Signed-off-by: Thomas Renninger <trenn@xxxxxxx>
Signed-off-by: Thomas Renninger <trenn@xxxxxxxxxxxxxxxxxx>
---
 drivers/misc/acer-wmi.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/misc/acer-wmi.c b/drivers/misc/acer-wmi.c
index e7a3fe5..a843ac2 100644
--- a/drivers/misc/acer-wmi.c
+++ b/drivers/misc/acer-wmi.c
@@ -1218,6 +1218,12 @@ static int __init acer_wmi_init(void)
 		return -ENODEV;
 	}
 
+	if (!acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
+		interface->capability &= ~ACER_CAP_BRIGHTNESS;
+		printk(ACER_INFO "Brightness must be controlled by "
+		       "generic video driver\n");
+	}
+
 	if (platform_driver_register(&acer_platform_driver)) {
 		printk(ACER_ERR "Unable to register platform driver.\n");
 		goto error_platform_register;
-- 
1.5.4.5

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