mb/google/brya/var/kinox: Modify DDR4 to non-interleaved

Kinox is designed to 8-layer PCB. In order to reduce the length of
memory singals, the DDR4 is designed from interleaved to
non-interleaved.

BUG=b:210094309
TEST=emerge-brask coreboot

Signed-off-by: Dtrain Hsu <dtrain_hsu@compal.corp-partner.google.com>
Change-Id: I03c6fcccf8b1646cec1a35cc1f9cbb1cfb942c4e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62953
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Zhuohao Lee <zhuohao@google.com>

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

@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 bootblock-y += gpio.c
 romstage-y += gpio.c
+romstage-y += memory.c
 ramstage-y += gpio.c
 ramstage-y += ramstage.c

src/mainboard/google/brya/variants/kinox/memory.c

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/gpio.h>
+#include <baseboard/variants.h>
+#include <gpio.h>
+#include <soc/romstage.h>
+
+static const struct mb_cfg ddr4_mem_config = {
+	.type = MEM_TYPE_DDR4,
+
+	.rcomp = {
+		/* Baseboard uses only 100ohm Rcomp resistors */
+		.resistor = 100,
+
+		/* Baseboard Rcomp target values */
+		.targets = {50, 20, 25, 25, 25},
+	},
+
+	.ect = 1, /* Early Command Training */
+
+	.UserBd = BOARD_TYPE_MOBILE,
+
+	.ddr_config = {
+		.dq_pins_interleaved = false,
+	},
+};
+
+const struct mb_cfg *variant_memory_params(void)
+{
+	return &ddr4_mem_config;
+}