diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index c5bec0096b7c..b3ca85410b2c 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -364,7 +364,17 @@ static void sun6i_dsi_inst_init(struct sun6i_dsi *dsi,
 static u16 sun6i_dsi_get_video_start_delay(struct sun6i_dsi *dsi,
 					   struct drm_display_mode *mode)
 {
-	u16 start = clamp(mode->vtotal - mode->vdisplay - 10, 8, 100);
+	/**
+	 * Allwinner legacy (drivers/video/sunxi/legacy),
+	 * new (drivers/video/sunxi/disp/de/lowlevel_sun8iw5) bsp drivers
+	 * are evaluating start as:
+	 *
+	 *	vtotal - vdisplay - 10
+	 *
+	 * but the new drivers are reassigning start to 1, which seems to be
+	 * working in all supported panels as of now.
+	 */
+	u8 start = 1;
 	u16 delay = mode->vtotal - (mode->vsync_end - mode->vdisplay) + start;
 
 	if (delay > mode->vtotal)