From 176a7fca81c5090a7240664e3002c106d296bf31 Mon Sep 17 00:00:00 2001
From: Jian-Hong Pan <jian-hong@endlessm.com>
Date: Mon, 30 Dec 2019 16:30:45 +0800
Subject: [PATCH] platform/x86: asus-wmi: Fix keyboard brightness cannot be set to 0
Git-commit: 176a7fca81c5090a7240664e3002c106d296bf31
Patch-mainline: v5.5-rc7
References: bsc#1051510
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: e9809c0b9670 ("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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/platform/x86/asus-wmi.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -457,13 +457,7 @@ static void kbd_led_update(struct work_s
{
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);
-
+ ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
}