diff --git a/src/soc/mediatek/mt8195/emi.c b/src/soc/mediatek/mt8195/emi.c
index 120665a29b..6cbcae1bc5 100644
--- a/src/soc/mediatek/mt8195/emi.c
+++ b/src/soc/mediatek/mt8195/emi.c
@@ -1,8 +1,25 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <console/console.h>
+#include <emi.h>
 #include <soc/emi.h>
 
 size_t sdram_size(void)
 {
-	return (size_t)4 * GiB;
+	int rank_num;
+	u64 rank_size[RANK_MAX];
+	static size_t dram_size = 0;
+
+	if (dram_size)
+		return dram_size;
+
+	get_rank_size_by_emi(rank_size);
+	rank_num = get_rank_nr_by_emi();
+
+	for (int i = 0; i < rank_num; i++)
+		dram_size += rank_size[i];
+
+	printk(BIOS_INFO, "dram size = %#lx\n", dram_size);
+
+	return dram_size;
 }