tree 81f69ad4add628d9f00e6b6211c86536cac8982d
parent 73ea03245445527a80b70e41cf4a910371014ca0
author Nico Huber <nico.h@gmx.de> 1527550504 +0200
committer Nico Huber <nico.h@gmx.de> 1528058011 +0000

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>