phy: rockchip-inno-hdmi-phy: TMDS calculation overflow

For example 3840x2160p60 (Pixel Clk: 594000000Hz) -> bus_width==5 (YUV420 10bit) -> TMDS Clk: 371250000 (and should not overflow) !
mcerveny · Jan 31, 2018 · b4bc703 · b4bc703
1 parent 732b356
commit b4bc703
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/drivers/phy/rockchip/phy-rockchip-inno-hdmi-phy.c b/drivers/phy/rockchip/phy-rockchip-inno-hdmi-phy.c
@@ -411,16 +411,16 @@ static u32 inno_hdmi_phy_get_tmdsclk(struct inno_hdmi_phy *inno, int rate)
 		tmdsclk = rate / 2;
 		break;
 	case 5:
-		tmdsclk = rate * 5 / 8;
+		tmdsclk = (uint64_t)rate * 5 / 8;
 		break;
 	case 6:
-		tmdsclk = rate * 3 / 4;
+		tmdsclk = (uint64_t)rate * 3 / 4;
 		break;
 	case 10:
-		tmdsclk = rate * 5 / 4;
+		tmdsclk = (uint64_t)rate * 5 / 4;
 		break;
 	case 12:
-		tmdsclk = rate * 3 / 2;
+		tmdsclk = (uint64_t)rate * 3 / 2;
 		break;
 	case 16:
 		tmdsclk = rate * 2;