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platform/x86: lg-laptop: Use correct event for keyboard backlight FN-key

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Use led_classdev_notify_brightness_hw_changed() instead of F16 key.

Signed-off-by: Matan Ziv-Av <matan@svgalib.org>
Link: https://lore.kernel.org/r/2196990f167efe6a42d51fb85f4db4cdf4d9e80e.1629291912.git.matan@svgalib.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Matan Ziv-Av 2021-08-18 15:47:31 +03:00 committed by Hans de Goede
parent 85973bf4c1
commit ae26278829
2 changed files with 22 additions and 10 deletions
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2
Documentation/admin-guide/laptops/lg-laptop.rst
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@ -15,8 +15,6 @@ The following FN keys are ignored by the kernel without this driver:
- FN-F1 (LG control panel) - Generates F15
- FN-F5 (Touchpad toggle) - Generates F21
- FN-F6 (Airplane mode) - Generates RFKILL
- FN-F8 (Keyboard backlight) - Generates F16.
This key also changes keyboard backlight mode.
- FN-F9 (Reader mode) - Generates F14
The rest of the FN keys work without a need for a special driver.

30
drivers/platform/x86/lg-laptop.c
View File

@ -17,11 +17,12 @@
#include <linux/platform_device.h>
#include <linux/types.h>
#define LED_DEVICE(_name, max) struct led_classdev _name = { \
#define LED_DEVICE(_name, max, flag) struct led_classdev _name = { \
.name = __stringify(_name), \
.max_brightness = max, \
.brightness_set = _name##_set, \
.brightness_get = _name##_get, \
.flags = flag, \
}
MODULE_AUTHOR("Matan Ziv-Av");
@ -71,6 +72,8 @@ static u32 inited;
#define INIT_SPARSE_KEYMAP 0x80
static int battery_limit_use_wmbb;
static struct led_classdev kbd_backlight;
static enum led_brightness get_kbd_backlight_level(void);
static const struct key_entry wmi_keymap[] = {
{KE_KEY, 0x70, {KEY_F15} }, /* LG control panel (F1) */
@ -217,10 +220,16 @@ static void wmi_notify(u32 value, void *context)
int eventcode = obj->integer.value;
struct key_entry *key;
key =
sparse_keymap_entry_from_scancode(wmi_input_dev, eventcode);
if (key && key->type == KE_KEY)
sparse_keymap_report_entry(wmi_input_dev, key, 1, true);
if (eventcode == 0x10000000) {
led_classdev_notify_brightness_hw_changed(
&kbd_backlight, get_kbd_backlight_level());
} else {
key = sparse_keymap_entry_from_scancode(
wmi_input_dev, eventcode);
if (key && key->type == KE_KEY)
sparse_keymap_report_entry(wmi_input_dev,
key, 1, true);
}
}
pr_debug("Type: %i Eventcode: 0x%llx\n", obj->type,
@ -548,7 +557,7 @@ static enum led_brightness tpad_led_get(struct led_classdev *cdev)
return ggov(GOV_TLED) > 0 ? LED_ON : LED_OFF;
}
static LED_DEVICE(tpad_led, 1);
static LED_DEVICE(tpad_led, 1, 0);
static void kbd_backlight_set(struct led_classdev *cdev,
enum led_brightness brightness)
@ -565,7 +574,7 @@ static void kbd_backlight_set(struct led_classdev *cdev,
kfree(r);
}
static enum led_brightness kbd_backlight_get(struct led_classdev *cdev)
static enum led_brightness get_kbd_backlight_level(void)
{
union acpi_object *r;
int val;
@ -596,7 +605,12 @@ static enum led_brightness kbd_backlight_get(struct led_classdev *cdev)
return val;
}
static LED_DEVICE(kbd_backlight, 255);
static enum led_brightness kbd_backlight_get(struct led_classdev *cdev)
{
return get_kbd_backlight_level();
}
static LED_DEVICE(kbd_backlight, 255, LED_BRIGHT_HW_CHANGED);
static void wmi_input_destroy(void)
{