mb/google/zork: config ddi for dirinboz

dirinboz does not support native HDMI, config DDI as below:
DDI0: eDP
DDI1: DP
DDI2: DP

BUG=b:161579679
BRANCH=master
TEST=1. emerge-zork coreboot chromeos-bootimage
     2. power on proto board successfully

Change-Id: I9dffdf5654680e3c2c0b259ee82a471f8ff14f56
Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44343
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/zork/variants/dirinboz/Makefile.inc

@@ -3,3 +3,4 @@
 subdirs-y += ./spd
 
 ramstage-y += gpio.c
+ramstage-y += variant.c

src/mainboard/google/zork/variants/dirinboz/variant.c

@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/variants.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <drivers/i2c/generic/chip.h>
+#include <soc/pci_devs.h>
+#include <ec/google/chromeec/ec.h>
+#include <ec/google/chromeec/i2c_tunnel/chip.h>
+#include <string.h>
+
+/* FIXME: Comments seem to suggest these are not entirely correct. */
+static const fsp_ddi_descriptor non_hdmi_ddi_descriptors[] = {
+	{
+		// DDI0, DP0, eDP
+		.connector_type = EDP,
+		.aux_index = AUX1,
+		.hdp_index = HDP1
+	},
+	{
+		// DDI1, DP1, DB OPT2 USB-C1 / DB OPT3 MST hub
+		.connector_type = DP,
+		.aux_index = AUX2,
+		.hdp_index = HDP2
+	},
+	{
+		// DP2 pins not connected on Dali
+		// DDI2, DP3, USB-C0
+		.connector_type = DP,
+		.aux_index = AUX4,
+		.hdp_index = HDP4,
+	}
+};
+
+void variant_get_dxio_ddi_descriptors(const fsp_dxio_descriptor **dxio_descs,
+				      size_t *dxio_num,
+				      const fsp_ddi_descriptor **ddi_descs,
+				      size_t *ddi_num)
+{
+
+	*dxio_descs = baseboard_get_dxio_descriptors(dxio_num);
+	*ddi_descs = &non_hdmi_ddi_descriptors[0];
+	*ddi_num = ARRAY_SIZE(non_hdmi_ddi_descriptors);
+}