diff --git a/common/skylake/hw-gfx-gma-plls-dpll_0.adb b/common/skylake/hw-gfx-gma-plls-dpll_0.adb
new file mode 100644
index 0000000..f981940
--- /dev/null
+++ b/common/skylake/hw-gfx-gma-plls-dpll_0.adb
@@ -0,0 +1,48 @@
+--
+-- Copyright (C) 2016 secunet Security Networks AG
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; version 2 of the License.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+
+with HW.GFX.GMA.Registers;
+
+package body HW.GFX.GMA.PLLs.DPLL_0 is
+
+   DPLL_CTRL1_DPLL0_LINK_RATE_MASK     : constant := 7 * 2 **  1;
+   DPLL_CTRL1_DPLL0_LINK_RATE_2700MHZ  : constant := 0 * 2 **  1;
+   DPLL_CTRL1_DPLL0_LINK_RATE_1350MHZ  : constant := 1 * 2 **  1;
+   DPLL_CTRL1_DPLL0_LINK_RATE_810MHZ   : constant := 2 * 2 **  1;
+   DPLL_CTRL1_DPLL0_LINK_RATE_1620MHZ  : constant := 3 * 2 **  1;
+   DPLL_CTRL1_DPLL0_LINK_RATE_1080MHZ  : constant := 4 * 2 **  1;
+   DPLL_CTRL1_DPLL0_LINK_RATE_2160MHZ  : constant := 5 * 2 **  1;
+   DPLL_CTRL1_DPLL0_OVERRIDE           : constant := 1 * 2 **  0;
+
+   procedure Check_Link_Rate
+     (Link_Rate   : in     DP_Bandwidth;
+      Success     :    out Boolean)
+   is
+      DPLL_Ctrl1 : Word32;
+   begin
+      Registers.Read (Registers.DPLL_CTRL1, DPLL_Ctrl1);
+
+      case DPLL_Ctrl1 and DPLL_CTRL1_DPLL0_LINK_RATE_MASK is
+         when DPLL_CTRL1_DPLL0_LINK_RATE_2700MHZ =>
+            Success := Link_Rate = DP_Bandwidth_5_4;
+         when DPLL_CTRL1_DPLL0_LINK_RATE_1350MHZ =>
+            Success := Link_Rate = DP_Bandwidth_2_7;
+         when DPLL_CTRL1_DPLL0_LINK_RATE_810MHZ =>
+            Success := Link_Rate = DP_Bandwidth_1_62;
+         when others =>
+            Success := False;
+      end case;
+      Success := Success and (DPLL_Ctrl1 and DPLL_CTRL1_DPLL0_OVERRIDE) /= 0;
+   end Check_Link_Rate;
+
+end HW.GFX.GMA.PLLs.DPLL_0;