Acer-WMI: fingers off backlight if video.ko is serving this functionality
 

From: Thomas Renninger <trenn@suse.de>

Bug: #257827
commit febf2d95a71cd594182e4b3defb0e0ffdfe61482 upstream

Signed-off-by: Thomas Renninger <trenn@suse.de>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Carlos Corbacho <carlos@strangeworlds.co.uk>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andy Whitcroft <apw@canonical.com>
---
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 d8b0d32..a4bef92 100644
--- a/drivers/misc/acer-wmi.c
+++ b/drivers/misc/acer-wmi.c
@@ -1242,6 +1242,12 @@ static int __init acer_wmi_init(void)

set_quirks();

+ 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
");
+ }
+
if (platform_driver_register(&acer_platform_driver)) {
printk(ACER_ERR "Unable to register platform driver.
");
goto error_platform_register;
--
1.6.0.4.911.gc990


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