Hi YH, Am Donnerstag, den 22.10.2015, 23:12 +0800 schrieb YH Huang: > In the case of the panel disabled by the bootloader, > your patch still has the following code and always enables the backlight > in the probe function. > pb->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable", > - GPIOD_OUT_HIGH); You are right. > What do you think if I remove these two lines in my patch? > if (pb->enable_gpio) > gpiod_direction_output(pb->enable_gpio, 0); That won't work if the gpio is still configured as input. How about I add the GPIOD_ASIS change to my patch you remove that and the above from yours? best regards Philipp -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html