diff --git a/common/haswell/hw-gfx-gma-power_and_clocks.adb b/common/haswell/hw-gfx-gma-power_and_clocks.adb
index 6a00a5f..1aea48e 100644
--- a/common/haswell/hw-gfx-gma-power_and_clocks.adb
+++ b/common/haswell/hw-gfx-gma-power_and_clocks.adb
@@ -334,6 +334,14 @@
       end if;
    end Power_Set_To;
 
+   procedure Power_Up (Port : Active_Port_Type; Success : out Boolean) is
+   begin
+      if Port /= eDP then
+         PDW_On;
+      end if;
+      Success := True;
+   end Power_Up;
+
    procedure Power_Up (Old_Configs, New_Configs : Pipe_Configs) is
    begin
       if not Need_PDW (Old_Configs) and Need_PDW (New_Configs) then
diff --git a/common/haswell/hw-gfx-gma-power_and_clocks.ads b/common/haswell/hw-gfx-gma-power_and_clocks.ads
index e4f2611..f7c5abe 100644
--- a/common/haswell/hw-gfx-gma-power_and_clocks.ads
+++ b/common/haswell/hw-gfx-gma-power_and_clocks.ads
@@ -32,6 +32,7 @@
    procedure Enable_CDClk is null;
 
    procedure Power_Set_To (Configs : Pipe_Configs);
+   procedure Power_Up (Port : Active_Port_Type; Success : out Boolean);
    procedure Power_Up (Old_Configs, New_Configs : Pipe_Configs);
    procedure Power_Down (Old_Configs, Tmp_Configs, New_Configs : Pipe_Configs);