diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 5591984a392b7e63f049a175072793dcbe51fe1f..f9649bded63ffdab5f921bd2374ed800411f8f14 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -1597,7 +1597,7 @@ static const struct panel_desc ontat_yx700wv03 = {
 		.width = 154,
 		.height = 83,
 	},
-	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.bus_format = MEDIA_BUS_FMT_RGB666_1X18,
 };
 
 static const struct drm_display_mode ortustech_com43h4m85ulc_mode  = {