Commit 176a7fca authored Dec 30, 2019 by Jian-Hong Pan Committed by Andy Shevchenko Jan 13, 2020

platform/x86: asus-wmi: Fix keyboard brightness cannot be set to 0



Some of ASUS laptops like UX431FL keyboard backlight cannot be set to
brightness 0. According to ASUS' information, the brightness should be
0x80 ~ 0x83. This patch fixes it by following the logic.

Fixes: e9809c0b ("asus-wmi: add keyboard backlight support")
Signed-off-by: Jian-Hong Pan <jian-hong@endlessm.com>
Reviewed-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

parent 515ff674

drivers/platform/x86/asus-wmi.c

+1 −7

Original line number	Diff line number	Diff line
		@@ -512,13 +512,7 @@ static void kbd_led_update(struct asus_wmi *asus)
		{
		int ctrl_param = 0;

		/*
		* bits 0-2: level
		* bit 7: light on/off
		*/
		if (asus->kbd_led_wk > 0)
		ctrl_param = 0x80 \| (asus->kbd_led_wk & 0x7F);

		asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
		}

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