diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c
index 5fd89596c9a2..8429b6518b50 100644
--- a/drivers/gpu/drm/bridge/tc358768.c
+++ b/drivers/gpu/drm/bridge/tc358768.c
@@ -631,7 +631,7 @@ static int tc358768_setup_pll(struct tc358768_priv *priv,
 
 static u32 tc358768_ns_to_cnt(u32 ns, u32 period_ps)
 {
-	return (ns * 1000 + period_ps) / period_ps;
+	return DIV_ROUND_UP(ns * 1000, period_ps);
 }
 
 static u32 tc358768_ps_to_ns(u32 ps)