[coreboot-gerrit] Change in coreboot[master]: mb/google/corsola: Add DRAM full calibration support

[Rex-BC Chen (Code Review)]

Attention is currently required from: Ryan Chuang.
Hello Ryan Chuang,

I'd like you to do a code review. Please visit

https://review.coreboot.org/c/coreboot/+/60386

to review the following change.

Change subject: mb/google/corsola: Add DRAM full calibration support
......................................................................

mb/google/corsola: Add DRAM full calibration support

Initialize and calibrate DRAM in romstage.

TEST=DRAM full calibration pass.
BUG=b:202871018

Signed-off-by: Ryan Chuang 
Change-Id: I80a18a8be5b1d47a5f0f7afed9601c0884e69035
---
M src/mainboard/google/corsola/Makefile.inc
M src/mainboard/google/corsola/romstage.c
A src/mainboard/google/corsola/sdram_configs.c
3 files changed, 18 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/86/60386/1

diff --git a/src/mainboard/google/corsola/Makefile.inc b/src/mainboard/google/corsola/Makefile.inc
index 1a9a1c28..e1e363c 100644
--- a/src/mainboard/google/corsola/Makefile.inc
+++ b/src/mainboard/google/corsola/Makefile.inc
@@ -11,6 +11,7 @@
 romstage-y += chromeos.c
 romstage-y += regulator.c
 romstage-y += romstage.c
+romstage-y += sdram_configs.c

ramstage-y += memlayout.ld
 ramstage-y += boardid.c
diff --git a/src/mainboard/google/corsola/romstage.c b/src/mainboard/google/corsola/romstage.c
index aff496b..8d03b5b 100644
--- a/src/mainboard/google/corsola/romstage.c
+++ b/src/mainboard/google/corsola/romstage.c
@@ -3,6 +3,7 @@
 #include <arch/stages.h>
 #include <console/console.h>
 #include <delay.h>
+#include <soc/emi.h>
 #include <soc/mt6366.h>
 #include <soc/pll_common.h>
 #include <soc/regulator.h>
@@ -26,4 +27,5 @@
    mt6366_init();
    raise_little_cpu_freq();
    rtc_boot();
+	mtk_dram_init();
 }
diff --git a/src/mainboard/google/corsola/sdram_configs.c b/src/mainboard/google/corsola/sdram_configs.c
new file mode 100644
index 0000000..f565f53
--- /dev/null
+++ b/src/mainboard/google/corsola/sdram_configs.c
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <soc/dramc_param.h>
+
+const struct sdram_info *get_sdram_config(void)
+{
+	/*
+	 * The MT8186 platform supports "dram adaptive" feature to
+	 * automatically detect dram information, including channel, rank, die size...,
+	 * and can automatically configure EMI settings.
+	 * So we will be passing a placeholder param blob.
+	 */
+	static struct sdram_info params;
+	return &params;
+}