soc/amd/cezanne: Pass DXIO and DDI Descriptors to FSP

This patch adds the functionality to write the DXIO and DDI descriptors
to the UPD data structure to the SoC code and adds the
mainboard_get_dxio_ddi_descriptors function to each mainboard using the
Cezanne SoC that gets called to get the descriptors from the board code.

Change-Id: I1cb36addcf0202cd56ce99e610a13d6d230bc981
Signed-off-by: Matt Papageorge <matthewpapa07@gmail.com>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51948
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

2 files changed, 22 insertions, 0 deletions

diff --git a/src/mainboard/google/mancomb/Makefile.inc b/src/mainboard/google/mancomb/Makefile.inc
index ccf90559c8..21e71d7a44 100644
--- a/src/mainboard/google/mancomb/Makefile.inc
+++ b/src/mainboard/google/mancomb/Makefile.inc
@@ -4,6 +4,8 @@ bootblock-y += bootblock.c
 
 verstage-y += verstage.c
 
+romstage-y += port_descriptors.c
+
 ramstage-y += ec.c
 ramstage-y += mainboard.c
 ramstage-$(CONFIG_CHROMEOS) += chromeos.c
diff --git a/src/mainboard/google/mancomb/port_descriptors.c b/src/mainboard/google/mancomb/port_descriptors.c
new file mode 100644
index 0000000000..8a761fecab
--- /dev/null
+++ b/src/mainboard/google/mancomb/port_descriptors.c
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <soc/platform_descriptors.h>
+#include <types.h>
+
+static const fsp_dxio_descriptor mancomb_czn_dxio_descriptors[] = {
+};
+
+static const fsp_ddi_descriptor mancomb_czn_ddi_descriptors[] = {
+};
+
+void mainboard_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 = mancomb_czn_dxio_descriptors;
+	*dxio_num = ARRAY_SIZE(mancomb_czn_dxio_descriptors);
+	*ddi_descs = mancomb_czn_ddi_descriptors;
+	*ddi_num = ARRAY_SIZE(mancomb_czn_ddi_descriptors);
+}