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[v3] led: multicolor: Fix intensity setting while SW blinking

Message ID 20250404184043.227116-1-sven@svenschwermer.de
State New
Headers show
Series [v3] led: multicolor: Fix intensity setting while SW blinking | expand

Commit Message

Sven Schwermer April 4, 2025, 6:40 p.m. UTC 
From: Sven Schwermer <sven.schwermer@disruptive-technologies.com>

When writing to the multi_intensity file, don't unconditionally call
led_set_brightness. By only doing this if blinking is inactive we
prevent blinking from stopping if the blinking is in its off phase while
the file is written.

Instead, if blinking is active, the changed intensity values are applied
upon the next blink. This is consistent with changing the brightness on
monochrome LEDs with active blinking.

Suggested-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Tested-by: Sven Schuchmann <schuchmann@schleissheimer.de>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Sven Schwermer <sven.schwermer@disruptive-technologies.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
---

Notes:
    V1->V2: Change title, add tags
    V2->V3: Add Pavel's ACK

 drivers/leds/led-class-multicolor.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/leds/led-class-multicolor.c b/drivers/leds/led-class-multicolor.c
index e317408583df9..5b1479b5d32ca 100644
--- a/drivers/leds/led-class-multicolor.c
+++ b/drivers/leds/led-class-multicolor.c
@@ -59,7 +59,8 @@  static ssize_t multi_intensity_store(struct device *dev,
 	for (i = 0; i < mcled_cdev->num_colors; i++)
 		mcled_cdev->subled_info[i].intensity = intensity_value[i];
 
-	led_set_brightness(led_cdev, led_cdev->brightness);
+	if (!test_bit(LED_BLINK_SW, &led_cdev->work_flags))
+		led_set_brightness(led_cdev, led_cdev->brightness);
 	ret = size;
 err_out:
 	mutex_unlock(&led_cdev->led_access);