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    Subject[PATCH 5.4 088/203] platform/x86: asus-wmi: Fix keyboard brightness cannot be set to 0
    Date
    From: Jian-Hong Pan <jian-hong@endlessm.com>

    commit 176a7fca81c5090a7240664e3002c106d296bf31 upstream.

    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>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    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
    @@ -512,13 +512,7 @@ static void kbd_led_update(struct asus_w
    {
    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);
    }


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