1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index d7efcb632f7d..002f1ce22bd0 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -297,14 +297,15 @@ static int pwm_backlight_probe(struct platform_device *pdev)
         }
 
         /*
-         * If the GPIO is configured as input, change the direction to output
-         * and set the GPIO as active.
+         * If the GPIO is not known to be already configured as output, that
+         * is, if gpiod_get_direction returns either GPIOF_DIR_IN or -EINVAL,
+         * change the direction to output and set the GPIO as active.
          * Do not force the GPIO to active when it was already output as it
          * could cause backlight flickering or we would enable the backlight too
          * early. Leave the decision of the initial backlight state for later.
          */
         if (pb->enable_gpio &&
-            gpiod_get_direction(pb->enable_gpio) == GPIOF_DIR_IN)
+            gpiod_get_direction(pb->enable_gpio) != GPIOF_DIR_OUT)
                 gpiod_direction_output(pb->enable_gpio, 1);
 
         pb->power_supply = devm_regulator_get(&pdev->dev, "power");