mb/kontron/ktqm77: Enable native gfx init through libgfxinit

Change-Id: Ie16b3236e7378a2062b3081e4530d7a4791b4b66
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17074
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/mainboard/kontron/ktqm77/Kconfig

@@ -12,6 +12,9 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select HAVE_OPTION_TABLE
 	select HAVE_ACPI_RESUME
 	select ENABLE_VMX
+	select MAINBOARD_HAS_LIBGFXINIT
+	select GFX_GMA_ANALOG_I2C_HDMI_B
+	select GFX_GMA_INTERNAL_IS_LVDS
 
 config MAINBOARD_DIR
 	string

src/mainboard/kontron/ktqm77/Makefile.inc

@@ -1 +1,3 @@
 romstage-y += gpio.c
+
+ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads

src/mainboard/kontron/ktqm77/gma-mainboard.ads

@@ -0,0 +1,21 @@
+with HW.GFX.GMA;
+
+use HW.GFX.GMA;
+
+private package GMA.Mainboard is
+
+   -- For a three-pipe setup, bandwidth is shared between the 2nd and
+   -- the 3rd pipe (if it's not eDP). Thus, probe ports that likely
+   -- have a high-resolution display attached first, `Internal` last.
+
+   ports : constant Port_List :=
+     (DP2,
+      DP3,
+      Digital1,
+      Digital2,
+      Digital3,
+      Analog,
+      Internal,
+      others => Disabled);
+
+end GMA.Mainboard;