diff --git a/drivers/gpu/drm/sun4i/sun4i_dotclock.c b/drivers/gpu/drm/sun4i/sun4i_dotclock.c
index d401156490f36c890f49f23d1eab1b3f7691d108..023f39bda633de70825243b3a28335e2686091ed 100644
--- a/drivers/gpu/drm/sun4i/sun4i_dotclock.c
+++ b/drivers/gpu/drm/sun4i/sun4i_dotclock.c
@@ -17,8 +17,9 @@
 #include "sun4i_dotclock.h"
 
 struct sun4i_dclk {
-	struct clk_hw	hw;
-	struct regmap	*regmap;
+	struct clk_hw		hw;
+	struct regmap		*regmap;
+	struct sun4i_tcon	*tcon;
 };
 
 static inline struct sun4i_dclk *hw_to_dclk(struct clk_hw *hw)
@@ -73,11 +74,13 @@ static unsigned long sun4i_dclk_recalc_rate(struct clk_hw *hw,
 static long sun4i_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
 				  unsigned long *parent_rate)
 {
+	struct sun4i_dclk *dclk = hw_to_dclk(hw);
+	struct sun4i_tcon *tcon = dclk->tcon;
 	unsigned long best_parent = 0;
 	u8 best_div = 1;
 	int i;
 
-	for (i = 6; i <= 127; i++) {
+	for (i = tcon->dclk_min_div; i <= tcon->dclk_max_div; i++) {
 		unsigned long ideal = rate * i;
 		unsigned long rounded;
 
@@ -167,6 +170,7 @@ int sun4i_dclk_create(struct device *dev, struct sun4i_tcon *tcon)
 	dclk = devm_kzalloc(dev, sizeof(*dclk), GFP_KERNEL);
 	if (!dclk)
 		return -ENOMEM;
+	dclk->tcon = tcon;
 
 	init.name = clk_name;
 	init.ops = &sun4i_dclk_ops;
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index a1ed462c24307b8b79eea334efdab6a5a17027a2..41d325c0420fa234c546034ac40c5484afbf9feb 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -177,6 +177,8 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 val = 0;
 
+	tcon->dclk_min_div = 6;
+	tcon->dclk_max_div = 127;
 	sun4i_tcon0_mode_set_common(tcon, mode);
 
 	/* Adjust clock delay */
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h
index 839266a3850590badb9cdfbb375c9d02ec03a24d..bd3ad7684870d30e2b6a94f84334d96f44cddbdd 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.h
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h
@@ -169,6 +169,8 @@ struct sun4i_tcon {
 
 	/* Pixel clock */
 	struct clk			*dclk;
+	u8				dclk_max_div;
+	u8				dclk_min_div;
 
 	/* Reset control */
 	struct reset_control		*lcd_rst;