google/glados: add libgfxinit support

Both linear framebuffer and vga text mode verified
on chell and caroline variants

Change-Id: I106e7bb761055581634176a112816be8447e6745
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37205
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/google/glados/Kconfig

@@ -19,6 +19,7 @@ config BOARD_GOOGLE_BASEBOARD_GLADOS
 	select MAINBOARD_HAS_TPM1
 	select SOC_INTEL_SKYLAKE
 	select SYSTEM_TYPE_LAPTOP
+	select MAINBOARD_HAS_LIBGFXINIT
 
 if BOARD_GOOGLE_BASEBOARD_GLADOS
 

src/mainboard/google/glados/Makefile.inc

@@ -30,6 +30,8 @@ ramstage-y += mainboard.c
 
 smm-y += smihandler.c
 
+ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads
+
 subdirs-y += variants/$(VARIANT_DIR)
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/baseboard/include
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/include

src/mainboard/google/glados/gma-mainboard.ads

@@ -0,0 +1,31 @@
+--
+-- This file is part of the coreboot project.
+--
+-- 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; either version 2 of the License, or
+-- (at your option) any later version.
+--
+-- 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;
+with HW.GFX.GMA.Display_Probing;
+
+use HW.GFX.GMA;
+use HW.GFX.GMA.Display_Probing;
+
+private package GMA.Mainboard is
+
+   ports : constant Port_List :=
+     (Internal,
+      DP1,
+      DP2,
+      HDMI1,
+      HDMI2,
+      others => Disabled);
+
+end GMA.Mainboard;