diff --git a/drivers/clk/rockchip/clk_rk3399.c b/drivers/clk/rockchip/clk_rk3399.c
index f748fb5189e..169f9668174 100644
--- a/drivers/clk/rockchip/clk_rk3399.c
+++ b/drivers/clk/rockchip/clk_rk3399.c
@@ -976,6 +976,8 @@ static ulong rk3399_clk_get_rate(struct clk *clk)
 	case PCLK_WDT:
 		rate = rk3399_alive_get_clk(priv->cru);
 		break;
+	case SCLK_DPHY_PLL:
+		return 24000000;
 	default:
 		log_debug("Unknown clock %lu\n", clk->id);
 		return -ENOENT;
diff --git a/drivers/video/rockchip/dw_mipi_dsi_rockchip.c b/drivers/video/rockchip/dw_mipi_dsi_rockchip.c
index 117c3db21ac..1bb1c7c67d0 100644
--- a/drivers/video/rockchip/dw_mipi_dsi_rockchip.c
+++ b/drivers/video/rockchip/dw_mipi_dsi_rockchip.c
@@ -521,8 +521,8 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, struct display_timing *timings,
 
 	mpclk = DIV_ROUND_UP(timings->pixelclock.typ, 1000);
 	if (mpclk) {
-		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
-		tmp = (mpclk * (bpp / lanes) * 10 / 8) / 1000;
+		/* take 1 / 0.9, since mbps must big than bandwidth of RGB */
+		tmp = (mpclk * (bpp / lanes) * 10 / 9) / 1000;
 		if (tmp < max_mbps)
 			target_mbps = tmp;
 		else