• Daniel Drake's avatar
    HID: asus: only support backlight when it's not driven by WMI · 3b692c55
    Daniel Drake authored
    The Asus GL502VSK has the same 0B05:1837 keyboard as we've seen in
    several Republic of Gamers laptops.
    
    However, in this model, the keybard backlight control exposed by hid-asus
    has no effect on the keyboard backlight. Instead, the keyboard
    backlight is correctly driven by asus-wmi.
    
    With two keyboard backlight devices available (and only the acer-wmi
    one working), GNOME is picking the wrong one to drive in the UI.
    
    Avoid this problem by not creating the backlight interface when we
    detect a WMI-driven keyboard backlight.
    
    We have also tested Asus GL702VMK which does have the hid-asus
    backlight present, and it still works fine with this patch (WMI method
    call returns UNSUPPORTED_METHOD).
    
    A direct "depends on ASUS_WMI" is intentionally avoided so that HID_ASUS
    users who have ASUS_WMI=n will not quietly lose their HID_ASUS driver on
    a kernel upgrade.
    Signed-off-by: default avatarDaniel Drake <drake@endlessm.com>
    Reviewed-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
    Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
    3b692c55
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