Re: [PATCH v3 09/11] platform/x86: asus-wmi: Control RGB keyboard backlight

Hi!

quoted

The WMI exposes two methods for controlling RGB keyboard backlight, which
allows controlling:
* RGB components in range 00 - ff,
* Switch between 4 effects,
* Switch between 3 effect speed modes,
* Separately enable the backlight on boot, in the awake state (after driver
  load), in sleep mode, and probably in something called shutdown mode (no
  observable effects of enabling it are known so far).

The configuration should be written to several sysfs parameter buffers
which are then written via WMI by writing either 1 or 2 to the "kbbl_set"
parameter. When reading the buffers the last written value is returned.

If the 2 is written to "kbbl_set", the parameters will be reset on reboot
(temporary mode), 1 is permanent mode, parameters are retained.

The calls use new 3-dword input buffer method call.

The functionality is only enabled if corresponding DSTS methods return
exact valid values.

The following script demonstrates usage:

echo Red [00 - ff]
echo 33 > /sys/devices/platform/asus-nb-wmi/kbbl/kbbl_red
echo Green [00 - ff]
echo ff > /sys/devices/platform/asus-nb-wmi/kbbl/kbbl_green
echo Blue [00 - ff]
echo 0 > /sys/devices/platform/asus-nb-wmi/kbbl/kbbl_blue
echo Mode: 0 - static color, 1 - breathing, 2 - color cycle, 3 - strobing
echo 0 > /sys/devices/platform/asus-nb-wmi/kbbl/kbbl_mode
echo Speed for modes 1 and 2: 0 - slow, 1 - medium, 2 - fast
echo 0 > /sys/devices/platform/asus-nb-wmi/kbbl/kbbl_speed
echo Enable: 02 - on boot, before module load, 08 - awake, 20 - sleep,
echo 2a or ff to set all
echo 2a > /sys/devices/platform/asus-nb-wmi/kbbl/kbbl_flags
echo Save: 1 - permanently, 2 - temporarily, reset after reboot
echo 1 > /sys/devices/platform/asus-nb-wmi/kbbl/kbbl_set

Shouldn't be the LED subsystem driver for this?

Yes, please. We have common interface for LED drivers; this needs to
use it.

Thanks,
									Pavel
-- 
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