drm/panel: panel-simple: Don't init gpio value at probe

When enable display on loader, init gpio would change
gpio status, that would make screen flash.

Change-Id: I4b69a8d3d83c5bef09014c2134abaee6522a7046
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Signed-off-by: Sandy Huang <hjc@rock-chips.com>
Signed-off-by: Guochun Huang <hero.huang@rock-chips.com>

drivers/gpu/drm/panel/panel-simple.c

@@ -585,8 +585,8 @@ static int panel_simple_suspend(struct device *dev)
 		}
 	}
 
-	gpiod_set_value_cansleep(p->reset_gpio, 1);
-	gpiod_set_value_cansleep(p->enable_gpio, 0);
+	gpiod_direction_output(p->reset_gpio, 1);
+	gpiod_direction_output(p->enable_gpio, 0);
 
 	panel_simple_regulator_disable(p);
 
@@ -630,7 +630,7 @@ static int panel_simple_resume(struct device *dev)
 		return err;
 	}
 
-	gpiod_set_value_cansleep(p->enable_gpio, 1);
+	gpiod_direction_output(p->enable_gpio, 1);
 
 	if (p->desc->delay.prepare)
 		panel_simple_msleep(p->desc->delay.prepare);
@@ -642,12 +642,12 @@ static int panel_simple_resume(struct device *dev)
 		return 0;
 	}
 
-	gpiod_set_value_cansleep(p->reset_gpio, 1);
+	gpiod_direction_output(p->reset_gpio, 1);
 
 	if (p->desc->delay.reset)
 		panel_simple_msleep(p->desc->delay.reset);
 
-	gpiod_set_value_cansleep(p->reset_gpio, 0);
+	gpiod_direction_output(p->reset_gpio, 0);
 
 	if (p->desc->delay.init)
 		panel_simple_msleep(p->desc->delay.init);