From: Hans de Goede <hdegoede@xxxxxxxxxx> [ Upstream commit df40a23cc34c200cfde559eda7ca540f3ae7bd9e ] The "input-events" LED trigger used to turn on the backlight LEDs had to be rewritten to use led_trigger_register_simple() + led_trigger_event() to fix a serious locking issue. This means it no longer supports using blink_brightness to set a per LED brightness for the trigger and it no longer sets LED_CORE_SUSPENDRESUME. Adjust the MiPad 2 bottom bezel touch buttons LED class device to match: 1. Make LED_FULL the maximum brightness to fix the LED brightness being very low when on. 2. Set flags = LED_CORE_SUSPENDRESUME. Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Link: https://lore.kernel.org/r/20240916090255.35548-1-hdegoede@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/platform/x86/x86-android-tablets/other.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/platform/x86/x86-android-tablets/other.c b/drivers/platform/x86/x86-android-tablets/other.c index eb0e55c69dfed..2549c348c8825 100644 --- a/drivers/platform/x86/x86-android-tablets/other.c +++ b/drivers/platform/x86/x86-android-tablets/other.c @@ -670,7 +670,7 @@ static const struct software_node *ktd2026_node_group[] = { * is controlled by the "pwm_soc_lpss_2" PWM output. */ #define XIAOMI_MIPAD2_LED_PERIOD_NS 19200 -#define XIAOMI_MIPAD2_LED_DEFAULT_DUTY 6000 /* From Android kernel */ +#define XIAOMI_MIPAD2_LED_MAX_DUTY_NS 6000 /* From Android kernel */ static struct pwm_device *xiaomi_mipad2_led_pwm; @@ -679,7 +679,7 @@ static int xiaomi_mipad2_brightness_set(struct led_classdev *led_cdev, { struct pwm_state state = { .period = XIAOMI_MIPAD2_LED_PERIOD_NS, - .duty_cycle = val, + .duty_cycle = XIAOMI_MIPAD2_LED_MAX_DUTY_NS * val / LED_FULL, /* Always set PWM enabled to avoid the pin floating */ .enabled = true, }; @@ -701,11 +701,11 @@ static int __init xiaomi_mipad2_init(struct device *dev) return -ENOMEM; led_cdev->name = "mipad2:white:touch-buttons-backlight"; - led_cdev->max_brightness = XIAOMI_MIPAD2_LED_PERIOD_NS; - /* "input-events" trigger uses blink_brightness */ - led_cdev->blink_brightness = XIAOMI_MIPAD2_LED_DEFAULT_DUTY; + led_cdev->max_brightness = LED_FULL; led_cdev->default_trigger = "input-events"; led_cdev->brightness_set_blocking = xiaomi_mipad2_brightness_set; + /* Turn LED off during suspend */ + led_cdev->flags = LED_CORE_SUSPENDRESUME; ret = devm_led_classdev_register(dev, led_cdev); if (ret) -- 2.43.0
