soc/mediatek: Obtain LPDDR type from trained memory info

Add lpddr_type to ddr_base_info struct to obtain LPDDR type
from trained memory info.

BUG=b:357743097
TEST=build pass

Change-Id: I73c9014784cc4872826d721f3fab9ed1c5255f31
Signed-off-by: Crystal Guo <crystal.guo@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85033
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/soc/mediatek/common/include/soc/dramc_param_common.h

@@ -92,7 +92,8 @@ enum SDRAM_VOLTAGE_TYPE {
 struct ddr_base_info {
 	u32 config_dvfs;		/* SDRAM_DVFS_FLAG */
 	struct sdram_info sdram;
-	u32 voltage_type;		/* SDRAM_VOLTAGE_TYPE */
+	u16 lpddr_type;
+	u16 voltage_type;		/* SDRAM_VOLTAGE_TYPE */
 	u32 support_ranks;
 	u64 rank_size[RANK_MAX];
 	struct emi_mdl emi_config;

src/soc/mediatek/common/include/soc/emi.h

@@ -16,5 +16,6 @@ bool is_dvfs_enabled(void);
 u32 get_ddr_geometry(void);
 u32 get_ddr_type(void);
 void init_dram_by_params(struct dramc_param *dparam);
+enum mem_chip_type map_to_lpddr_dram_type(uint16_t lpddr_type);
 
 #endif /* SOC_MEDIATEK_COMMON_EMI_H */

src/soc/mediatek/common/memory.c

@@ -106,6 +106,11 @@ size_t mtk_dram_size(void)
 	return size;
 }
 
+__weak enum mem_chip_type map_to_lpddr_dram_type(uint16_t lpddr_type)
+{
+	return MEM_CHIP_LPDDR4X;
+}
+
 static void fill_dram_info(struct mem_chip_info *mc, const struct ddr_base_info *ddr)
 {
 	unsigned int c, r;
@@ -118,7 +123,7 @@ static void fill_dram_info(struct mem_chip_info *mc, const struct ddr_base_info
 		for (r = 0; r < ddr->mrr_info.rank_nums; r++) {
 			entry->channel = c;
 			entry->rank = r;
-			entry->type = MEM_CHIP_LPDDR4X;
+			entry->type = map_to_lpddr_dram_type(ddr->lpddr_type);
 			entry->channel_io_width = DQ_DATA_WIDTH_LP4;
 			entry->density_mbits = ddr->mrr_info.mr8_density[r] / CHANNEL_MAX /
 					       (MiB / 8);