diff options
| author | Rong Zhang <i@rong.moe> | 2025-07-08 00:38:07 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-01 09:48:42 +0100 |
| commit | d2a6a3543fd2a892918ab09037292f5a23e590da (patch) | |
| tree | c9e0923a19d84aaeb7ca4bc41336190ce9358a92 | |
| parent | 616ca3c4d11e9cf2660110be9d892e1935841aad (diff) | |
platform/x86: ideapad-laptop: Fix kbd backlight not remembered among boots
commit e10981075adce203eac0be866389309eeb8ef11e upstream.
On some models supported by ideapad-laptop, the HW/FW can remember the
state of keyboard backlight among boots. However, it is always turned
off while shutting down, as a side effect of the LED class device
unregistering sequence.
This is inconvenient for users who always prefer turning on the
keyboard backlight. Thus, set LED_RETAIN_AT_SHUTDOWN on the LED class
device so that the state of keyboard backlight gets remembered, which
also aligns with the behavior of manufacturer utilities on Windows.
Fixes: 503325f84bc0 ("platform/x86: ideapad-laptop: add keyboard backlight control support")
Cc: stable@vger.kernel.org
Signed-off-by: Rong Zhang <i@rong.moe>
Reviewed-by: Hans de Goede <hansg@kernel.org>
Link: https://lore.kernel.org/r/20250707163808.155876-3-i@rong.moe
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/platform/x86/ideapad-laptop.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c index 6e6ec8c404d1..c7e8bcf3d623 100644 --- a/drivers/platform/x86/ideapad-laptop.c +++ b/drivers/platform/x86/ideapad-laptop.c @@ -1672,7 +1672,7 @@ static int ideapad_kbd_bl_init(struct ideapad_private *priv) priv->kbd_bl.led.name = "platform::" LED_FUNCTION_KBD_BACKLIGHT; priv->kbd_bl.led.brightness_get = ideapad_kbd_bl_led_cdev_brightness_get; priv->kbd_bl.led.brightness_set_blocking = ideapad_kbd_bl_led_cdev_brightness_set; - priv->kbd_bl.led.flags = LED_BRIGHT_HW_CHANGED; + priv->kbd_bl.led.flags = LED_BRIGHT_HW_CHANGED | LED_RETAIN_AT_SHUTDOWN; err = led_classdev_register(&priv->platform_device->dev, &priv->kbd_bl.led); if (err) |