diff --git a/common/ironlake/hw-gfx-gma-pch-lvds.adb b/common/ironlake/hw-gfx-gma-pch-lvds.adb
new file mode 100644
index 0000000..6ad334e
--- /dev/null
+++ b/common/ironlake/hw-gfx-gma-pch-lvds.adb
@@ -0,0 +1,58 @@
+--
+-- Copyright (C) 2015-2016 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.Config;
+with HW.GFX.GMA.Registers;
+
+with HW.Debug;
+with GNAT.Source_Info;
+
+package body HW.GFX.GMA.PCH.LVDS is
+
+   PCH_LVDS_ENABLE               : constant :=  1 * 2 ** 31;
+   PCH_LVDS_TWO_CHANNEL          : constant := 15 * 2 **  2;
+
+   PCH_LVDS_MASK : constant Word32 :=
+      PCH_TRANSCODER_SELECT_MASK or
+      PCH_LVDS_ENABLE or
+      PCH_LVDS_TWO_CHANNEL;
+
+   ----------------------------------------------------------------------------
+
+   procedure On (Port_Cfg : Port_Config; FDI_Port : FDI_Port_Type)
+   is
+      Two_Channel : constant Word32 :=
+        (if Port_Cfg.Mode.Dotclock >= Config.LVDS_Dual_Threshold then
+            PCH_LVDS_TWO_CHANNEL else 0);
+   begin
+      pragma Debug (Debug.Put_Line (GNAT.Source_Info.Enclosing_Entity));
+
+      Registers.Unset_And_Set_Mask
+         (Register   => Registers.PCH_LVDS,
+          Mask_Unset => PCH_LVDS_MASK,
+          Mask_Set   => PCH_LVDS_ENABLE or
+                        PCH_TRANSCODER_SELECT (FDI_Port) or
+                        Two_Channel);
+   end On;
+
+   ----------------------------------------------------------------------------
+
+   procedure Off
+   is
+   begin
+      pragma Debug (Debug.Put_Line (GNAT.Source_Info.Enclosing_Entity));
+
+      Registers.Unset_Mask (Registers.PCH_LVDS, PCH_LVDS_ENABLE);
+   end Off;
+
+end HW.GFX.GMA.PCH.LVDS;