diff options
| author | Luke D. Jones <[email protected]> | 2023-08-30 15:22:37 +1200 |
|---|---|---|
| committer | Hans de Goede <[email protected]> | 2023-09-12 10:18:07 +0200 |
| commit | 2c97d3e55b70edf33b6e7f211bab8a748a0a2bcc (patch) | |
| tree | 8fb7893bfbaa9608cbf854fae9752490548842cb /net/lapb/lapb_subr.c | |
| parent | eab541aac7f49d2f6e21e486af0bd3048cebb3dd (diff) | |
platform/x86: asus-wmi: add support for ASUS screenpad
Add support for the WMI methods used to turn off and adjust the
brightness of the secondary "screenpad" device found on some high-end
ASUS laptops like the GX650P series and others.
There are some small quirks with this device when considering only the
raw WMI methods:
1. The Off method can only switch the device off
2. Changing the brightness turns the device back on
3. To turn the device back on the brightness must be > 1
4. When the device is off the brightness can't be changed (so it is
stored by the driver if device is off).
5. Booting with a value of 0 brightness (retained by bios) means the bios
will set a value of >0 <15
6. When the device is off it is "unplugged"
asus_wmi sets the minimum brightness as 20 in general use, and 60 for
booting with values <= min.
The ACPI methods are used in a new backlight device named asus_screenpad.
Signed-off-by: Luke D. Jones <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Hans de Goede <[email protected]>
Signed-off-by: Hans de Goede <[email protected]>
Diffstat (limited to 'net/lapb/lapb_subr.c')
0 files changed, 0 insertions, 0 deletions