gma hsw+: Don't use DDI E if DDI A uses all lanes
DDI E shares its two lanes with DDI A. If DDI A is configured to use
all four lanes, DDI E is disabled. As DDI E is the only DDI that can
be configured in FDI mode to feed the PCH DAC, treat `Analog` as in-
valid in this configuration.
Change-Id: I94e9537c9f30d0cbf757b816f38d44e1b43805b3
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/20821
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/common/hw-gfx-gma-config.ads.template b/common/hw-gfx-gma-config.ads.template
index 3f7ca64..98259ff 100644
--- a/common/hw-gfx-gma-config.ads.template
+++ b/common/hw-gfx-gma-config.ads.template
@@ -96,6 +96,8 @@
Has_DDI_D : constant Boolean := CPU >= Haswell and
CPU_Var = Normal and
not Has_DDI_PHYs;
+ Has_DDI_E : constant Boolean := -- might be disabled by x4 eDP
+ Has_DDI_D;
Has_DDI_Buffer_Trans : constant Boolean := CPU >= Haswell and
CPU /= Broxton;