gma hsw: Enable Power Down Well for scaling on DDI A
The primary pipe can drive DDI A (eDP) without the Power Down
Well (PDW). The scalers are inside the PDW, though. To enable
scaling for DDI A, ensure the PDW is active.
When switching between scaled / unscaled modes, we'll have to
reconfigure the whole pipe.
Change-Id: I46318bb74d00a584d268a9d76787f8b26249264d
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/26663
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/common/hw-gfx-gma-config.ads.template b/common/hw-gfx-gma-config.ads.template
index 1a4d124..46e2782 100644
--- a/common/hw-gfx-gma-config.ads.template
+++ b/common/hw-gfx-gma-config.ads.template
@@ -1,5 +1,5 @@
--
--- Copyright (C) 2015-2017 secunet Security Networks AG
+-- Copyright (C) 2015-2018 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
@@ -47,6 +47,7 @@
(CPU in Haswell .. Broadwell);
Pipe_Enabled_Workaround : constant Boolean := CPU = Broadwell;
Has_EDP_Transcoder : constant Boolean := CPU >= Haswell;
+ Use_PDW_For_EDP_Scaling : constant Boolean := CPU = Haswell;
Has_Pipe_DDI_Func : constant Boolean := CPU >= Haswell;
Has_Trans_Clk_Sel : constant Boolean := CPU >= Haswell;
Has_Pipe_MSA_Misc : constant Boolean := CPU >= Haswell;