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platform/x86: sony-laptop: Don't turn off 0x153 keyboard backlight during probe

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The 0x153 version of the kbd backlight control SNC handle has no separate
address to probe if the backlight is there.

This turns the probe call into a set keyboard backlight call with a value
of 0 turning off the keyboard backlight.

Skip probing when there is no separate probe address to avoid this.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=1583752
Fixes: 800f20170d ("Keyboard backlight control for some Vaio Fit models")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mattia Dongili <malattia@linux.it>
Link: https://lore.kernel.org/r/20221213122943.11123-1-hdegoede@redhat.com
This commit is contained in:
Hans de Goede 2022-12-13 13:29:43 +01:00
parent 1b929c02af
commit ad75bd85b1
1 changed files with 14 additions and 7 deletions
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21
drivers/platform/x86/sony-laptop.c
View file

@ -1887,14 +1887,21 @@ static int sony_nc_kbd_backlight_setup(struct platform_device *pd,
break;
}
ret = sony_call_snc_handle(handle, probe_base, &result);
if (ret)
return ret;
/*
* Only probe if there is a separate probe_base, otherwise the probe call
* is equivalent to __sony_nc_kbd_backlight_mode_set(0), resulting in
* the keyboard backlight being turned off.
*/
if (probe_base) {
ret = sony_call_snc_handle(handle, probe_base, &result);
if (ret)
return ret;
if ((handle == 0x0137 && !(result & 0x02)) ||
!(result & 0x01)) {
dprintk("no backlight keyboard found\n");
return 0;
if ((handle == 0x0137 && !(result & 0x02)) ||
!(result & 0x01)) {
dprintk("no backlight keyboard found\n");
return 0;
}
}
kbdbl_ctl = kzalloc(sizeof(*kbdbl_ctl), GFP_KERNEL);