diff --git a/drivers/mfd/rtl8411.c b/drivers/mfd/rtl8411.c
index e4c1833..5280135 100644
--- a/drivers/mfd/rtl8411.c
+++ b/drivers/mfd/rtl8411.c
@@ -452,6 +452,8 @@ void rtl8411_init_params(struct rtsx_pcr *pcr)
 	pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
 	pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
 	pcr->aspm_en = ASPM_L1_EN;
+	pcr->tx_initial_phase = SET_CLOCK_PHASE(23, 7, 14);
+	pcr->rx_initial_phase = SET_CLOCK_PHASE(4, 3, 10);
 
 	pcr->ic_version = rtl8411_get_ic_version(pcr);
 	pcr->sd_pull_ctl_enable_tbl = rtl8411_sd_pull_ctl_enable_tbl;
@@ -471,6 +473,8 @@ void rtl8411b_init_params(struct rtsx_pcr *pcr)
 	pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
 	pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
 	pcr->aspm_en = ASPM_L1_EN;
+	pcr->tx_initial_phase = SET_CLOCK_PHASE(23, 7, 14);
+	pcr->rx_initial_phase = SET_CLOCK_PHASE(4, 3, 10);
 
 	pcr->ic_version = rtl8411_get_ic_version(pcr);
 
diff --git a/drivers/mfd/rts5209.c b/drivers/mfd/rts5209.c
index 4026e1f..cb04174 100644
--- a/drivers/mfd/rts5209.c
+++ b/drivers/mfd/rts5209.c
@@ -270,6 +270,8 @@ void rts5209_init_params(struct rtsx_pcr *pcr)
 	pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
 	pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
 	pcr->aspm_en = ASPM_L1_EN;
+	pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 16);
+	pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
 
 	pcr->ic_version = rts5209_get_ic_version(pcr);
 	pcr->sd_pull_ctl_enable_tbl = rts5209_sd_pull_ctl_enable_tbl;
diff --git a/drivers/mfd/rts5227.c b/drivers/mfd/rts5227.c
index d7cae82..c001151 100644
--- a/drivers/mfd/rts5227.c
+++ b/drivers/mfd/rts5227.c
@@ -291,6 +291,8 @@ void rts5227_init_params(struct rtsx_pcr *pcr)
 	pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_B;
 	pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
 	pcr->aspm_en = ASPM_L1_EN;
+	pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15);
+	pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 7, 7);
 
 	pcr->sd_pull_ctl_enable_tbl = rts5227_sd_pull_ctl_enable_tbl;
 	pcr->sd_pull_ctl_disable_tbl = rts5227_sd_pull_ctl_disable_tbl;
diff --git a/drivers/mfd/rts5229.c b/drivers/mfd/rts5229.c
index 620e7fa..6353f5d 100644
--- a/drivers/mfd/rts5229.c
+++ b/drivers/mfd/rts5229.c
@@ -261,6 +261,8 @@ void rts5229_init_params(struct rtsx_pcr *pcr)
 	pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
 	pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
 	pcr->aspm_en = ASPM_L1_EN;
+	pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15);
+	pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 6, 6);
 
 	pcr->ic_version = rts5229_get_ic_version(pcr);
 	if (pcr->ic_version == IC_VER_C) {
diff --git a/drivers/mfd/rts5249.c b/drivers/mfd/rts5249.c
index ea90f8f..3b835f5 100644
--- a/drivers/mfd/rts5249.c
+++ b/drivers/mfd/rts5249.c
@@ -298,6 +298,8 @@ void rts5249_init_params(struct rtsx_pcr *pcr)
 	pcr->sd30_drive_sel_1v8 = CFG_DRIVER_TYPE_C;
 	pcr->sd30_drive_sel_3v3 = CFG_DRIVER_TYPE_B;
 	pcr->aspm_en = ASPM_L1_EN;
+	pcr->tx_initial_phase = SET_CLOCK_PHASE(1, 29, 16);
+	pcr->rx_initial_phase = SET_CLOCK_PHASE(24, 6, 5);
 
 	pcr->ic_version = rts5249_get_ic_version(pcr);
 	pcr->sd_pull_ctl_enable_tbl = rts5249_sd_pull_ctl_enable_tbl;
diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
index 82a35b9..fcb368e 100644
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -56,7 +56,6 @@ struct realtek_pci_sdmmc {
 	bool			double_clk;
 	bool			eject;
 	bool			initial_mode;
-	bool			ddr_mode;
 	int			power_state;
 #define SDMMC_POWER_ON		1
 #define SDMMC_POWER_OFF		0
@@ -475,18 +474,24 @@ static void sd_normal_rw(struct realtek_pci_sdmmc *host,
 	kfree(buf);
 }
 
-static int sd_change_phase(struct realtek_pci_sdmmc *host, u8 sample_point)
+static int sd_change_phase(struct realtek_pci_sdmmc *host,
+		u8 sample_point, bool rx)
 {
 	struct rtsx_pcr *pcr = host->pcr;
 	int err;
 
-	dev_dbg(sdmmc_dev(host), "%s: sample_point = %d\n",
-			__func__, sample_point);
+	dev_dbg(sdmmc_dev(host), "%s(%s): sample_point = %d\n",
+			__func__, rx ? "RX" : "TX", sample_point);
 
 	rtsx_pci_init_cmd(pcr);
 
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CLK_CTL, CHANGE_CLK, CHANGE_CLK);
-	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPRX_CTL, 0x1F, sample_point);
+	if (rx)
+		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
+				SD_VPRX_CTL, 0x1F, sample_point);
+	else
+		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD,
+				SD_VPTX_CTL, 0x1F, sample_point);
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL, PHASE_NOT_RESET, 0);
 	rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_VPCLK0_CTL,
 			PHASE_NOT_RESET, PHASE_NOT_RESET);
@@ -602,7 +607,7 @@ static int sd_tuning_rx_cmd(struct realtek_pci_sdmmc *host,
 	int err;
 	u8 cmd[5] = {0};
 
-	err = sd_change_phase(host, sample_point);
+	err = sd_change_phase(host, sample_point, true);
 	if (err < 0)
 		return err;
 
@@ -664,7 +669,7 @@ static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
 		if (final_phase == 0xFF)
 			return -EINVAL;
 
-		err = sd_change_phase(host, final_phase);
+		err = sd_change_phase(host, final_phase, true);
 		if (err < 0)
 			return err;
 	} else {
@@ -833,14 +838,11 @@ static int sd_set_power_mode(struct realtek_pci_sdmmc *host,
 	return err;
 }
 
-static int sd_set_timing(struct realtek_pci_sdmmc *host,
-		unsigned char timing, bool *ddr_mode)
+static int sd_set_timing(struct realtek_pci_sdmmc *host, unsigned char timing)
 {
 	struct rtsx_pcr *pcr = host->pcr;
 	int err = 0;
 
-	*ddr_mode = false;
-
 	rtsx_pci_init_cmd(pcr);
 
 	switch (timing) {
@@ -857,8 +859,6 @@ static int sd_set_timing(struct realtek_pci_sdmmc *host,
 		break;
 
 	case MMC_TIMING_UHS_DDR50:
-		*ddr_mode = true;
-
 		rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD_CFG1,
 				0x0C | SD_ASYNC_FIFO_NOT_RST,
 				SD_DDR_MODE | SD_ASYNC_FIFO_NOT_RST);
@@ -926,7 +926,7 @@ static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 
 	sd_set_bus_width(host, ios->bus_width);
 	sd_set_power_mode(host, ios->power_mode);
-	sd_set_timing(host, ios->timing, &host->ddr_mode);
+	sd_set_timing(host, ios->timing);
 
 	host->vpclk = false;
 	host->double_clk = true;
@@ -1148,9 +1148,35 @@ static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
 
 	rtsx_pci_start_run(pcr);
 
-	if (!host->ddr_mode)
-		err = sd_tuning_rx(host, MMC_SEND_TUNING_BLOCK);
+	/* Set initial TX phase */
+	switch (mmc->ios.timing) {
+	case MMC_TIMING_UHS_SDR104:
+		err = sd_change_phase(host, SDR104_TX_PHASE(pcr), false);
+		break;
+
+	case MMC_TIMING_UHS_SDR50:
+		err = sd_change_phase(host, SDR50_TX_PHASE(pcr), false);
+		break;
+
+	case MMC_TIMING_UHS_DDR50:
+		err = sd_change_phase(host, DDR50_TX_PHASE(pcr), false);
+		break;
+
+	default:
+		err = 0;
+	}
 
+	if (err)
+		goto out;
+
+	/* Tuning RX phase */
+	if ((mmc->ios.timing == MMC_TIMING_UHS_SDR104) ||
+			(mmc->ios.timing == MMC_TIMING_UHS_SDR50))
+		err = sd_tuning_rx(host, opcode);
+	else if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
+		err = sd_change_phase(host, DDR50_RX_PHASE(pcr), true);
+
+out:
 	mutex_unlock(&pcr->pcr_mutex);
 
 	return err;
diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
index daefca1..d1382df 100644
--- a/include/linux/mfd/rtsx_pci.h
+++ b/include/linux/mfd/rtsx_pci.h
@@ -847,6 +847,9 @@ struct rtsx_pcr {
 #define PCR_REVERSE_SOCKET		(1 << 1)
 	u32				flags;
 
+	u32				tx_initial_phase;
+	u32				rx_initial_phase;
+
 	const u32			*sd_pull_ctl_enable_tbl;
 	const u32			*sd_pull_ctl_disable_tbl;
 	const u32			*ms_pull_ctl_enable_tbl;
@@ -863,6 +866,18 @@ struct rtsx_pcr {
 #define PCI_VID(pcr)			((pcr)->pci->vendor)
 #define PCI_PID(pcr)			((pcr)->pci->device)
 
+#define SDR104_PHASE(val)		((val) & 0xFF)
+#define SDR50_PHASE(val)		(((val) >> 8) & 0xFF)
+#define DDR50_PHASE(val)		(((val) >> 16) & 0xFF)
+#define SDR104_TX_PHASE(pcr)		SDR104_PHASE((pcr)->tx_initial_phase)
+#define SDR50_TX_PHASE(pcr)		SDR50_PHASE((pcr)->tx_initial_phase)
+#define DDR50_TX_PHASE(pcr)		DDR50_PHASE((pcr)->tx_initial_phase)
+#define SDR104_RX_PHASE(pcr)		SDR104_PHASE((pcr)->rx_initial_phase)
+#define SDR50_RX_PHASE(pcr)		SDR50_PHASE((pcr)->rx_initial_phase)
+#define DDR50_RX_PHASE(pcr)		DDR50_PHASE((pcr)->rx_initial_phase)
+#define SET_CLOCK_PHASE(sdr104, sdr50, ddr50)	\
+				(((ddr50) << 16) | ((sdr50) << 8) | (sdr104))
+
 void rtsx_pci_start_run(struct rtsx_pcr *pcr);
 int rtsx_pci_write_register(struct rtsx_pcr *pcr, u16 addr, u8 mask, u8 data);
 int rtsx_pci_read_register(struct rtsx_pcr *pcr, u16 addr, u8 *data);
