soc/mediatek/mt8183: Adjust tRFCab and tRFCpb by the density value

Different density should correspond to different tRFCab and tRFCpb
timing.

BUG=none
BRANCH=kukui
TEST=Boots correctly on Kukui

Change-Id: I2599fcd620cdefe2e12480932ffd75e0416b9545
Signed-off-by: Huayang Duan <huayang.duan@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42194
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

3 files changed, 157 insertions, 20 deletions

diff --git a/src/soc/mediatek/mt8183/dramc_pi_calibration_api.c b/src/soc/mediatek/mt8183/dramc_pi_calibration_api.c
index ee9b9b6b70..50d847f542 100644
--- a/src/soc/mediatek/mt8183/dramc_pi_calibration_api.c
+++ b/src/soc/mediatek/mt8183/dramc_pi_calibration_api.c
@@ -130,6 +130,19 @@ void dramc_mode_reg_write(u8 chn, u8 mr_idx, u8 value)
 	dramc_dbg("Write MR%d =0x%x\n", mr_idx, value);
 }
 
+static u8 dramc_mode_reg_read_by_rank(u8 chn, u8 rank, u8 mr_idx)
+{
+	u8 value;
+	u32 rk_bak = READ32_BITFIELD(&ch[chn].ao.mrs, MRS_MRRRK);
+
+	SET32_BITFIELDS(&ch[chn].ao.mrs, MRS_MRRRK, rank);
+	value = dramc_mode_reg_read(chn, mr_idx);
+	SET32_BITFIELDS(&ch[chn].ao.mrs, MRS_MRRRK, rk_bak);
+
+	dramc_dbg("Mode reg read rank%d MR%d = %#x\n", rank, mr_idx, value);
+	return value;
+}
+
 static void dramc_mode_reg_write_by_rank(u8 chn, u8 rank,
 		u8 mr_idx, u8 value)
 {
@@ -2694,6 +2707,55 @@ void dramc_dqs_precalculation_preset(void)
 	}
 }
 
+void get_dram_info_after_cal(u8 *density_result)
+{
+	u8 vendor_id, density, max_density = 0;
+	u32 ddr_size, max_size = 0;
+
+	vendor_id = dramc_mode_reg_read_by_rank(CHANNEL_A, RANK_0, 5);
+	dramc_show("Vendor id is %#x\n", vendor_id);
+
+	for (u8 rk = RANK_0; rk < RANK_MAX; rk++) {
+		density = dramc_mode_reg_read_by_rank(CHANNEL_A, rk, 8);
+		dramc_dbg("MR8 %#x\n", density);
+		density = (density >> 2) & 0xf;
+
+		switch (density) {
+		case 0x0:
+			ddr_size = 4;
+			break;
+		case 0x1:
+			ddr_size = 6;
+			break;
+		case 0x2:
+			ddr_size = 8;
+			break;
+		case 0x3:
+			ddr_size = 12;
+			break;
+		case 0x4:
+			ddr_size = 16;
+			break;
+		case 0x5:
+			ddr_size = 24;
+			break;
+		case 0x6:
+			ddr_size = 32;
+			break;
+		default:
+			ddr_size = 0;
+			break;
+		}
+		if (ddr_size > max_size) {
+			max_size = ddr_size;
+			max_density = density;
+		}
+		dramc_dbg("RK%d size %dGb, density:%d\n", rk, ddr_size, max_density);
+	}
+
+	*density_result = max_density;
+}
+
 int dramc_calibrate_all_channels(const struct sdram_params *pams, u8 freq_group,
 				 const struct mr_value *mr)
 {
diff --git a/src/soc/mediatek/mt8183/emi.c b/src/soc/mediatek/mt8183/emi.c
index fd09ef1b77..579bfbecbc 100644
--- a/src/soc/mediatek/mt8183/emi.c
+++ b/src/soc/mediatek/mt8183/emi.c
@@ -49,10 +49,10 @@ const u8 phy_mapping[CHANNEL_MAX][16] = {
 };
 
 struct optimize_ac_time {
-	u8 rfc;
-	u8 rfc_05t;
-	u8 rfc_pb;
-	u8 rfrc_pb05t;
+	u8 trfc;
+	u8 trfrc_05t;
+	u8 trfc_pb;
+	u8 trfrc_pb05t;
 	u16 tx_ref_cnt;
 };
 
@@ -319,30 +319,102 @@ static void dramc_init_pre_settings(void)
 	setbits32(&ch[0].phy.misc_ctrl1, 0x1 << 31);
 }
 
-static void dramc_ac_timing_optimize(u8 freq_group)
+static void dramc_ac_timing_optimize(u8 freq_group, u8 density)
 {
-	struct optimize_ac_time rf_cab_opt[LP4X_DDRFREQ_MAX] = {
-		[LP4X_DDR1600] = {.rfc = 44, .rfc_05t = 0, .rfc_pb = 16,
-			.rfrc_pb05t = 0, .tx_ref_cnt = 62},
-		[LP4X_DDR2400] = {.rfc = 72, .rfc_05t = 0, .rfc_pb = 30,
-			.rfrc_pb05t = 0, .tx_ref_cnt = 91},
-		[LP4X_DDR3200] = {.rfc = 100, .rfc_05t = 0, .rfc_pb = 44,
-			.rfrc_pb05t = 0, .tx_ref_cnt = 119},
-		[LP4X_DDR3600] = {.rfc = 118, .rfc_05t = 1, .rfc_pb = 53,
-			.rfrc_pb05t = 1, .tx_ref_cnt = 138},
+	u8 rfcab_grp = 0;
+	u8 trfc, trfrc_05t, trfc_pb, trfrc_pb05t, tx_ref_cnt;
+	enum tRFCAB {
+		tRFCAB_130 = 0,
+		tRFCAB_180,
+		tRFCAB_280,
+		tRFCAB_380,
+		tRFCAB_NUM
 	};
 
+	const struct optimize_ac_time rf_cab_opt[LP4X_DDRFREQ_MAX][tRFCAB_NUM] = {
+		[LP4X_DDR1600] = {
+			[tRFCAB_130] = {.trfc = 14, .trfrc_05t = 0, .trfc_pb = 0,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 32},
+			[tRFCAB_180] = {.trfc = 24, .trfrc_05t = 0, .trfc_pb = 6,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 42},
+			[tRFCAB_280] = {.trfc = 44, .trfrc_05t = 0, .trfc_pb = 16,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 62},
+			[tRFCAB_380] = {.trfc = 64, .trfrc_05t = 0, .trfc_pb = 26,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 82}
+		},
+		[LP4X_DDR2400] = {
+			[tRFCAB_130] = {.trfc = 27, .trfrc_05t = 0, .trfc_pb = 6,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 46},
+			[tRFCAB_180] = {.trfc = 42, .trfrc_05t = 0, .trfc_pb = 15,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 61},
+			[tRFCAB_280] = {.trfc = 72, .trfrc_05t = 0, .trfc_pb = 30,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 91},
+			[tRFCAB_380] = {.trfc = 102, .trfrc_05t = 0, .trfc_pb = 45,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 121}
+		},
+		[LP4X_DDR3200] = {
+			[tRFCAB_130] = {.trfc = 40, .trfrc_05t = 0, .trfc_pb = 12,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 59},
+			[tRFCAB_180] = {.trfc = 60, .trfrc_05t = 0, .trfc_pb = 24,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 79},
+			[tRFCAB_280] = {.trfc = 100, .trfrc_05t = 0, .trfc_pb = 44,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 119},
+			[tRFCAB_380] = {.trfc = 140, .trfrc_05t = 0, .trfc_pb = 64,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 159}
+		},
+		[LP4X_DDR3600] = {
+			[tRFCAB_130] = {.trfc = 48, .trfrc_05t = 1, .trfc_pb = 16,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 68},
+			[tRFCAB_180] = {.trfc = 72, .trfrc_05t = 0, .trfc_pb = 30,
+				.trfrc_pb05t = 0, .tx_ref_cnt = 92},
+			[tRFCAB_280] = {.trfc = 118, .trfrc_05t = 1, .trfc_pb = 53,
+				.trfrc_pb05t = 1, .tx_ref_cnt = 138},
+			[tRFCAB_380] = {.trfc = 165, .trfrc_05t = 0, .trfc_pb = 76,
+				.trfrc_pb05t = 1, .tx_ref_cnt = 185}
+		},
+	};
+
+	switch (density) {
+	case 0x0:
+		rfcab_grp = tRFCAB_130;
+		break;
+	case 0x1:
+	case 0x2:
+		rfcab_grp = tRFCAB_180;
+		break;
+	case 0x3:
+	case 0x4:
+		rfcab_grp = tRFCAB_280;
+		break;
+	case 0x5:
+	case 0x6:
+		rfcab_grp = tRFCAB_380;
+		break;
+	default:
+		dramc_err("density err!\n");
+		break;
+	}
+
+	const struct optimize_ac_time *ac_tim = &rf_cab_opt[freq_group][rfcab_grp];
+	trfc = ac_tim->trfc;
+	trfrc_05t = ac_tim->trfrc_05t;
+	trfc_pb = ac_tim->trfc_pb;
+	trfrc_pb05t = ac_tim->trfrc_pb05t;
+	tx_ref_cnt = ac_tim->tx_ref_cnt;
+	dramc_dbg("Density %d, trfc %u, trfrc_05t %d, tx_ref_cnt %d, trfc_pb %d, trfrc_pb05t %d\n",
+		density, trfc, trfrc_05t, tx_ref_cnt, trfc_pb, trfrc_pb05t);
+
 	for (size_t chn = 0; chn < CHANNEL_MAX; chn++) {
 		clrsetbits32(&ch[chn].ao.shu[0].actim[3],
-			0xff << 16, rf_cab_opt[freq_group].rfc << 16);
+			0xff << 16, trfc << 16);
 		clrsetbits32(&ch[chn].ao.shu[0].ac_time_05t,
-			0x1 << 2, rf_cab_opt[freq_group].rfc_05t << 2);
+			0x1 << 2, trfrc_05t << 2);
 		clrsetbits32(&ch[chn].ao.shu[0].actim[4],
-			0x3ff << 0, rf_cab_opt[freq_group].tx_ref_cnt << 0);
+			0x3ff << 0, tx_ref_cnt << 0);
 		clrsetbits32(&ch[chn].ao.shu[0].actim[3],
-			0xff << 0, rf_cab_opt[freq_group].rfc_pb << 0);
+			0xff << 0, trfc_pb << 0);
 		clrsetbits32(&ch[chn].ao.shu[0].ac_time_05t,
-			0x1 << 1, rf_cab_opt[freq_group].rfrc_pb05t << 1);
+			0x1 << 1, trfrc_pb05t << 1);
 	}
 }
 
@@ -494,6 +566,7 @@ static int run_calib(const struct dramc_param *dparam,
 		     struct dram_shared_data *shared,
 		     const int shuffle, bool *first_run)
 {
+	u8 density;
 	const u8 *freq_tbl;
 
 	if (CONFIG(MT8183_DRAM_EMCP))
@@ -518,7 +591,8 @@ static int run_calib(const struct dramc_param *dparam,
 	dramc_dbg("Start K (current clock: %u\n", params->frequency);
 	if (dramc_calibrate_all_channels(params, freq_group, &shared->mr) != 0)
 		return -1;
-	dramc_ac_timing_optimize(freq_group);
+	get_dram_info_after_cal(&density);
+	dramc_ac_timing_optimize(freq_group, density);
 	dramc_dbg("K finished (current clock: %u\n", params->frequency);
 
 	dramc_save_result_to_shuffle(DRAM_DFS_SHUFFLE_1, shuffle);
diff --git a/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h b/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
index 66433602c5..437ed3db2d 100644
--- a/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
+++ b/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
@@ -106,5 +106,6 @@ void dramc_cke_fix_onoff(u8 chn, bool fix_on, bool fix_off);
 u32 get_shu_freq(u8 shu);
 void dramc_hw_dqsosc(u8 chn);
 void dramc_dqs_precalculation_preset(void);
+void get_dram_info_after_cal(u8 *density);
 
 #endif /* _DRAMC_PI_API_MT8183_H */