mb/google/brya: Split gma-mainboards for different baseboards

Allow different gma-mainboards configs for different baseboards
as they support varying display interfaces.  Set Brya to eDP only
and Brask to HDMI only.

BUG=b:277861633
BRANCH=firmware-brya-14505.B
TEST=Builds and SoL functions on both brya and brask varaints

Change-Id: Iaf3f35b009d53e50723e4aa82c0f4932783f9bb9
Signed-off-by: Tarun Tuli <taruntuli@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74696
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>

src/mainboard/google/brya/Makefile.inc

@@ -4,7 +4,6 @@ verstage-$(CONFIG_CHROMEOS) += chromeos.c
 
 romstage-$(CONFIG_CHROMEOS) += chromeos.c
 romstage-y += romstage.c
-romstage-$(CONFIG_MAINBOARD_USE_EARLY_LIBGFXINIT) += gma-mainboard.ads
 
 ramstage-$(CONFIG_CHROMEOS) += chromeos.c
 ramstage-y += mainboard.c

src/mainboard/google/brya/variants/baseboard/brask/Makefile.inc

@@ -1,6 +1,7 @@
 bootblock-y += gpio.c
 
 romstage-y += memory.c
+romstage-$(CONFIG_MAINBOARD_USE_EARLY_LIBGFXINIT) += gma-mainboard.ads
 romstage-y += gpio.c
 
 ramstage-y += gpio.c

src/mainboard/google/brya/variants/baseboard/brask/gma-mainboard-ads

@@ -0,0 +1,15 @@
+-- SPDX-License-Identifier: GPL-2.0-or-later
+
+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 :=
+     (  HDMI1,
+	HDMI2,
+	HDMI3,
+	others => Disabled);
+end GMA.Mainboard;

src/mainboard/google/brya/variants/baseboard/brya/Makefile.inc

@@ -2,6 +2,7 @@ bootblock-y += gpio.c
 
 romstage-y += memory.c
 romstage-y += gpio.c
+romstage-$(CONFIG_MAINBOARD_USE_EARLY_LIBGFXINIT) += gma-mainboard.ads
 
 ramstage-y += gpio.c
 ramstage-y += ramstage.c