diff options
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 057389d69a51..995f0164c9b0 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -54,14 +54,18 @@ static int pwm_backlight_update_status(struct backlight_device *bl) pwm_config(pb->pwm, 0, pb->period); pwm_disable(pb->pwm); } else { + int duty_cycle; + if (pb->levels) { - brightness = pb->levels[brightness]; + duty_cycle = pb->levels[brightness]; max = pb->levels[max]; + } else { + duty_cycle = brightness; } - brightness = pb->lth_brightness + - (brightness * (pb->period - pb->lth_brightness) / max); - pwm_config(pb->pwm, brightness, pb->period); + duty_cycle = pb->lth_brightness + + (duty_cycle * (pb->period - pb->lth_brightness) / max); + pwm_config(pb->pwm, duty_cycle, pb->period); pwm_enable(pb->pwm); } |