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From:   Can Guo <quic_cang@quicinc.com>
To:     quic_cang@quicinc.com, bvanassche@acm.org, mani@kernel.org,
        adrian.hunter@intel.com, beanhuo@micron.com, avri.altman@wdc.com,
        junwoo80.lee@samsung.com, martin.petersen@oracle.com
Cc:     linux-scsi@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Vinod Koul <vkoul@kernel.org>,
        Kishon Vijay Abraham I <kishon@kernel.org>,
        linux-phy@lists.infradead.org (open list:GENERIC PHY FRAMEWORK),
        linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v5 09/10] phy: qualcomm: phy-qcom-qmp-ufs: Add High Speed Gear 5 support for SM8550
Date:   Thu, 23 Nov 2023 00:46:29 -0800
Message-Id: <1700729190-17268-10-git-send-email-quic_cang@quicinc.com>
In-Reply-To: <1700729190-17268-1-git-send-email-quic_cang@quicinc.com>
References: <1700729190-17268-1-git-send-email-quic_cang@quicinc.com>
Precedence: bulk

On SM8550, two sets of UFS PHY settings are provided, one set is to support
HS-G5, another set is to support HS-G4 and lower gears. The two sets of PHY
settings are programming different values to different registers, mixing
the two sets and/or overwriting one set with another set is definitely not
blessed by UFS PHY designers.

To add HS-G5 support for SM8550, split the two sets of PHY settings into
their dedicated overlay tables, only the common parts of the two sets of
PHY settings are left in the .tbls.

Consider we are going to add even higher gear support in future, to avoid
adding more tables with different names, rename the .tbls_hs_g4 and make it
an array, a size of 2 is enough as of now.

In this case, .tbls alone is not a complete set of PHY settings, so either
tbls_hs_overlay[0] or tbls_hs_overlay[1] must be applied on top of the
.tbls to become a complete set of PHY settings.

Signed-off-by: Can Guo <quic_cang@quicinc.com>
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcs-ufs-v6.h     |   2 +
 drivers/phy/qualcomm/phy-qcom-qmp-qserdes-com-v6.h |   2 +
 .../qualcomm/phy-qcom-qmp-qserdes-txrx-ufs-v6.h    |   9 ++
 drivers/phy/qualcomm/phy-qcom-qmp-ufs.c            | 174 ++++++++++++++++++---
 4 files changed, 166 insertions(+), 21 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcs-ufs-v6.h b/drivers/phy/qualcomm/phy-qcom-qmp-pcs-ufs-v6.h
index c23d5e4..e563af5 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcs-ufs-v6.h
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcs-ufs-v6.h
@@ -18,6 +18,7 @@
 #define QPHY_V6_PCS_UFS_BIST_FIXED_PAT_CTRL		0x060
 #define QPHY_V6_PCS_UFS_TX_HSGEAR_CAPABILITY		0x074
 #define QPHY_V6_PCS_UFS_RX_HSGEAR_CAPABILITY		0x0bc
+#define QPHY_V6_PCS_UFS_RX_HS_G5_SYNC_LENGTH_CAPABILITY	0x12c
 #define QPHY_V6_PCS_UFS_DEBUG_BUS_CLKSEL		0x158
 #define QPHY_V6_PCS_UFS_LINECFG_DISABLE			0x17c
 #define QPHY_V6_PCS_UFS_RX_MIN_HIBERN8_TIME		0x184
@@ -27,5 +28,6 @@
 #define QPHY_V6_PCS_UFS_READY_STATUS			0x1a8
 #define QPHY_V6_PCS_UFS_TX_MID_TERM_CTRL1		0x1f4
 #define QPHY_V6_PCS_UFS_MULTI_LANE_CTRL1		0x1fc
+#define QPHY_V6_PCS_UFS_RX_HSG5_SYNC_WAIT_TIME		0x220
 
 #endif
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-com-v6.h b/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-com-v6.h
index f420f8f..ef392ce 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-com-v6.h
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-com-v6.h
@@ -56,6 +56,8 @@
 #define QSERDES_V6_COM_SYS_CLK_CTRL				0xe4
 #define QSERDES_V6_COM_SYSCLK_BUF_ENABLE			0xe8
 #define QSERDES_V6_COM_PLL_IVCO					0xf4
+#define QSERDES_V6_COM_CMN_IETRIM				0xfc
+#define QSERDES_V6_COM_CMN_IPTRIM				0x100
 #define QSERDES_V6_COM_SYSCLK_EN_SEL				0x110
 #define QSERDES_V6_COM_RESETSM_CNTRL				0x118
 #define QSERDES_V6_COM_LOCK_CMP_EN				0x120
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-txrx-ufs-v6.h b/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-txrx-ufs-v6.h
index 674f158..48f31c8 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-txrx-ufs-v6.h
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-txrx-ufs-v6.h
@@ -15,8 +15,15 @@
 
 #define QSERDES_UFS_V6_RX_UCDR_FASTLOCK_FO_GAIN_RATE2		0x08
 #define QSERDES_UFS_V6_RX_UCDR_FASTLOCK_FO_GAIN_RATE4		0x10
+#define QSERDES_UFS_V6_RX_UCDR_FASTLOCK_SO_GAIN_RATE4		0x24
+#define QSERDES_UFS_V6_RX_UCDR_FASTLOCK_COUNT_HIGH_RATE4	0x54
 #define QSERDES_UFS_V6_RX_UCDR_FO_GAIN_RATE2			0xd4
+#define QSERDES_UFS_V6_RX_UCDR_FO_GAIN_RATE4			0xdc
+#define QSERDES_UFS_V6_RX_UCDR_SO_GAIN_RATE4			0xf0
+#define QSERDES_UFS_V6_RX_UCDR_PI_CONTROLS			0xf4
 #define QSERDES_UFS_V6_RX_VGA_CAL_MAN_VAL			0x178
+#define QSERDES_UFS_V6_RX_EQ_OFFSET_ADAPTOR_CNTRL1		0x1bc
+#define QSERDES_UFS_V6_RX_OFFSET_ADAPTOR_CNTRL3			0x1c4
 #define QSERDES_UFS_V6_RX_MODE_RATE_0_1_B0			0x208
 #define QSERDES_UFS_V6_RX_MODE_RATE_0_1_B1			0x20c
 #define QSERDES_UFS_V6_RX_MODE_RATE_0_1_B3			0x214
@@ -28,6 +35,8 @@
 #define QSERDES_UFS_V6_RX_MODE_RATE3_B5				0x264
 #define QSERDES_UFS_V6_RX_MODE_RATE3_B8				0x270
 #define QSERDES_UFS_V6_RX_MODE_RATE4_B3				0x280
+#define QSERDES_UFS_V6_RX_MODE_RATE4_B4				0x284
 #define QSERDES_UFS_V6_RX_MODE_RATE4_B6				0x28c
+#define QSERDES_UFS_V6_RX_DLL0_FTUNE_CTRL			0x2f8
 
 #endif
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
index ad91f92..29106ec 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
@@ -41,6 +41,8 @@
 
 #define PHY_INIT_COMPLETE_TIMEOUT		10000
 
+#define NUM_OVERLAY				2
+
 struct qmp_phy_init_tbl {
 	unsigned int offset;
 	unsigned int val;
@@ -649,15 +651,22 @@ static const struct qmp_phy_init_tbl sm8550_ufsphy_serdes[] = {
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_HSCLK_SEL_1, 0x11),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_HSCLK_HS_SWITCH_SEL_1, 0x00),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_LOCK_CMP_EN, 0x01),
-	QMP_PHY_INIT_CFG(QSERDES_V6_COM_VCO_TUNE_MAP, 0x04),
-	QMP_PHY_INIT_CFG(QSERDES_V6_COM_PLL_IVCO, 0x0f),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_VCO_TUNE_INITVAL2, 0x00),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_DEC_START_MODE0, 0x41),
-	QMP_PHY_INIT_CFG(QSERDES_V6_COM_CP_CTRL_MODE0, 0x0a),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_PLL_RCTRL_MODE0, 0x18),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_PLL_CCTRL_MODE0, 0x14),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_LOCK_CMP1_MODE0, 0x7f),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_LOCK_CMP2_MODE0, 0x06),
+};
+
+static const struct qmp_phy_init_tbl sm8550_ufsphy_hs_b_serdes[] = {
+	QMP_PHY_INIT_CFG(QSERDES_V6_COM_VCO_TUNE_MAP, 0x44),
+};
+
+static const struct qmp_phy_init_tbl sm8550_ufsphy_g4_serdes[] = {
+	QMP_PHY_INIT_CFG(QSERDES_V6_COM_VCO_TUNE_MAP, 0x04),
+	QMP_PHY_INIT_CFG(QSERDES_V6_COM_PLL_IVCO, 0x0f),
+	QMP_PHY_INIT_CFG(QSERDES_V6_COM_CP_CTRL_MODE0, 0x0a),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_DEC_START_MODE1, 0x4c),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_CP_CTRL_MODE1, 0x0a),
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_PLL_RCTRL_MODE1, 0x18),
@@ -666,19 +675,24 @@ static const struct qmp_phy_init_tbl sm8550_ufsphy_serdes[] = {
 	QMP_PHY_INIT_CFG(QSERDES_V6_COM_LOCK_CMP2_MODE1, 0x07),
 };
 
-static const struct qmp_phy_init_tbl sm8550_ufsphy_hs_b_serdes[] = {
-	QMP_PHY_INIT_CFG(QSERDES_V6_COM_VCO_TUNE_MAP, 0x44),
+static const struct qmp_phy_init_tbl sm8550_ufsphy_g5_serdes[] = {
+	QMP_PHY_INIT_CFG(QSERDES_V6_COM_PLL_IVCO, 0x1f),
+	QMP_PHY_INIT_CFG(QSERDES_V6_COM_CMN_IETRIM, 0x1b),
+	QMP_PHY_INIT_CFG(QSERDES_V6_COM_CMN_IPTRIM, 0x1c),
+	QMP_PHY_INIT_CFG(QSERDES_V6_COM_CP_CTRL_MODE0, 0x06),
 };
 
 static const struct qmp_phy_init_tbl sm8550_ufsphy_tx[] = {
 	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_TX_LANE_MODE_1, 0x05),
 	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_TX_RES_CODE_LANE_OFFSET_TX, 0x07),
+};
+
+static const struct qmp_phy_init_tbl sm8550_ufsphy_g4_tx[] = {
 	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_TX_FR_DCC_CTRL, 0x4c),
 };
 
 static const struct qmp_phy_init_tbl sm8550_ufsphy_rx[] = {
 	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_UCDR_FO_GAIN_RATE2, 0x0c),
-	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_VGA_CAL_MAN_VAL, 0x0e),
 
 	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_MODE_RATE_0_1_B0, 0xc2),
 	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_MODE_RATE_0_1_B1, 0xc2),
@@ -694,16 +708,45 @@ static const struct qmp_phy_init_tbl sm8550_ufsphy_rx[] = {
 	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_MODE_RATE3_B8, 0x02),
 };
 
+static const struct qmp_phy_init_tbl sm8550_ufsphy_g4_rx[] = {
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_VGA_CAL_MAN_VAL, 0x0e),
+};
+
+static const struct qmp_phy_init_tbl sm8550_ufsphy_g5_rx[] = {
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_UCDR_FO_GAIN_RATE4, 0x0c),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_UCDR_SO_GAIN_RATE4, 0x04),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_EQ_OFFSET_ADAPTOR_CNTRL1, 0x14),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_UCDR_PI_CONTROLS, 0x07),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_OFFSET_ADAPTOR_CNTRL3, 0x0e),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_UCDR_FASTLOCK_COUNT_HIGH_RATE4, 0x02),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_UCDR_FASTLOCK_FO_GAIN_RATE4, 0x1c),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_UCDR_FASTLOCK_SO_GAIN_RATE4, 0x06),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_VGA_CAL_MAN_VAL, 0x08),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_MODE_RATE4_B3, 0xb9),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_MODE_RATE4_B4, 0x4f),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_MODE_RATE4_B6, 0xff),
+	QMP_PHY_INIT_CFG(QSERDES_UFS_V6_RX_DLL0_FTUNE_CTRL, 0x30),
+};
+
 static const struct qmp_phy_init_tbl sm8550_ufsphy_pcs[] = {
 	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_RX_SIGDET_CTRL2, 0x69),
 	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_TX_LARGE_AMP_DRV_LVL, 0x0f),
 	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_TX_MID_TERM_CTRL1, 0x43),
-	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_PLL_CNTL, 0x2b),
 	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_MULTI_LANE_CTRL1, 0x02),
+};
+
+static const struct qmp_phy_init_tbl sm8550_ufsphy_g4_pcs[] = {
+	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_PLL_CNTL, 0x2b),
 	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_TX_HSGEAR_CAPABILITY, 0x04),
 	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_RX_HSGEAR_CAPABILITY, 0x04),
 };
 
+static const struct qmp_phy_init_tbl sm8550_ufsphy_g5_pcs[] = {
+	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_PLL_CNTL, 0x33),
+	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_RX_HS_G5_SYNC_LENGTH_CAPABILITY, 0x4f),
+	QMP_PHY_INIT_CFG(QPHY_V6_PCS_UFS_RX_HSG5_SYNC_WAIT_TIME, 0x9e),
+};
+
 struct qmp_ufs_offsets {
 	u16 serdes;
 	u16 pcs;
@@ -723,6 +766,8 @@ struct qmp_phy_cfg_tbls {
 	int rx_num;
 	const struct qmp_phy_init_tbl *pcs;
 	int pcs_num;
+	/* Maximum supported Gear of this tbls */
+	u32 max_gear;
 };
 
 /* struct qmp_phy_cfg - per-PHY initialization config */
@@ -730,13 +775,15 @@ struct qmp_phy_cfg {
 	int lanes;
 
 	const struct qmp_ufs_offsets *offsets;
+	/* Maximum supported Gear of this config */
+	u32 max_supported_gear;
 
 	/* Main init sequence for PHY blocks - serdes, tx, rx, pcs */
 	const struct qmp_phy_cfg_tbls tbls;
 	/* Additional sequence for HS Series B */
 	const struct qmp_phy_cfg_tbls tbls_hs_b;
-	/* Additional sequence for HS G4 */
-	const struct qmp_phy_cfg_tbls tbls_hs_g4;
+	/* Additional sequence for different HS Gears */
+	const struct qmp_phy_cfg_tbls tbls_hs_overlay[NUM_OVERLAY];
 
 	/* clock ids to be requested */
 	const char * const *clk_list;
@@ -839,6 +886,7 @@ static const struct qmp_phy_cfg msm8996_ufsphy_cfg = {
 	.lanes			= 1,
 
 	.offsets		= &qmp_ufs_offsets,
+	.max_supported_gear	= UFS_HS_G3,
 
 	.tbls = {
 		.serdes		= msm8996_ufsphy_serdes,
@@ -864,6 +912,7 @@ static const struct qmp_phy_cfg sa8775p_ufsphy_cfg = {
 	.lanes			= 2,
 
 	.offsets		= &qmp_ufs_offsets,
+	.max_supported_gear	= UFS_HS_G4,
 
 	.tbls = {
 		.serdes		= sm8350_ufsphy_serdes,
@@ -879,13 +928,14 @@ static const struct qmp_phy_cfg sa8775p_ufsphy_cfg = {
 		.serdes		= sm8350_ufsphy_hs_b_serdes,
 		.serdes_num	= ARRAY_SIZE(sm8350_ufsphy_hs_b_serdes),
 	},
-	.tbls_hs_g4 = {
+	.tbls_hs_overlay[0] = {
 		.tx		= sm8350_ufsphy_g4_tx,
 		.tx_num		= ARRAY_SIZE(sm8350_ufsphy_g4_tx),
 		.rx		= sm8350_ufsphy_g4_rx,
 		.rx_num		= ARRAY_SIZE(sm8350_ufsphy_g4_rx),
 		.pcs		= sm8350_ufsphy_g4_pcs,
 		.pcs_num	= ARRAY_SIZE(sm8350_ufsphy_g4_pcs),
+		.max_gear	= UFS_HS_G4,
 	},
 	.clk_list		= sm8450_ufs_phy_clk_l,
 	.num_clks		= ARRAY_SIZE(sm8450_ufs_phy_clk_l),
@@ -898,6 +948,7 @@ static const struct qmp_phy_cfg sc8280xp_ufsphy_cfg = {
 	.lanes			= 2,
 
 	.offsets		= &qmp_ufs_offsets,
+	.max_supported_gear	= UFS_HS_G4,
 
 	.tbls = {
 		.serdes		= sm8350_ufsphy_serdes,
@@ -913,13 +964,14 @@ static const struct qmp_phy_cfg sc8280xp_ufsphy_cfg = {
 		.serdes		= sm8350_ufsphy_hs_b_serdes,
 		.serdes_num	= ARRAY_SIZE(sm8350_ufsphy_hs_b_serdes),
 	},
-	.tbls_hs_g4 = {
+	.tbls_hs_overlay[0] = {
 		.tx		= sm8350_ufsphy_g4_tx,
 		.tx_num		= ARRAY_SIZE(sm8350_ufsphy_g4_tx),
 		.rx		= sm8350_ufsphy_g4_rx,
 		.rx_num		= ARRAY_SIZE(sm8350_ufsphy_g4_rx),
 		.pcs		= sm8350_ufsphy_g4_pcs,
 		.pcs_num	= ARRAY_SIZE(sm8350_ufsphy_g4_pcs),
+		.max_gear	= UFS_HS_G4,
 	},
 	.clk_list		= sdm845_ufs_phy_clk_l,
 	.num_clks		= ARRAY_SIZE(sdm845_ufs_phy_clk_l),
@@ -932,6 +984,7 @@ static const struct qmp_phy_cfg sdm845_ufsphy_cfg = {
 	.lanes			= 2,
 
 	.offsets		= &qmp_ufs_offsets,
+	.max_supported_gear	= UFS_HS_G3,
 
 	.tbls = {
 		.serdes		= sdm845_ufsphy_serdes,
@@ -960,6 +1013,7 @@ static const struct qmp_phy_cfg sm6115_ufsphy_cfg = {
 	.lanes			= 1,
 
 	.offsets		= &qmp_ufs_offsets,
+	.max_supported_gear	= UFS_HS_G3,
 
 	.tbls = {
 		.serdes		= sm6115_ufsphy_serdes,
@@ -988,6 +1042,7 @@ static const struct qmp_phy_cfg sm7150_ufsphy_cfg = {
 	.lanes			= 1,
 
 	.offsets		= &qmp_ufs_offsets,
+	.max_supported_gear	= UFS_HS_G3,
 
 	.tbls = {
 		.serdes		= sdm845_ufsphy_serdes,
@@ -1016,6 +1071,7 @@ static const struct qmp_phy_cfg sm8150_ufsphy_cfg = {
 	.lanes			= 2,
 
 	.offsets		= &qmp_ufs_offsets,
+	.max_supported_gear	= UFS_HS_G4,
 
 	.tbls = {
 		.serdes		= sm8150_ufsphy_serdes,
@@ -1031,13 +1087,14 @@ static const struct qmp_phy_cfg sm8150_ufsphy_cfg = {
 		.serdes		= sm8150_ufsphy_hs_b_serdes,
 		.serdes_num	= ARRAY_SIZE(sm8150_ufsphy_hs_b_serdes),
 	},
-	.tbls_hs_g4 = {
+	.tbls_hs_overlay[0] = {
 		.tx		= sm8150_ufsphy_hs_g4_tx,
 		.tx_num		= ARRAY_SIZE(sm8150_ufsphy_hs_g4_tx),
 		.rx		= sm8150_ufsphy_hs_g4_rx,
 		.rx_num		= ARRAY_SIZE(sm8150_ufsphy_hs_g4_rx),
 		.pcs		= sm8150_ufsphy_hs_g4_pcs,
 		.pcs_num	= ARRAY_SIZE(sm8150_ufsphy_hs_g4_pcs),
+		.max_gear	= UFS_HS_G4,
 	},
 	.clk_list		= sdm845_ufs_phy_clk_l,
 	.num_clks		= ARRAY_SIZE(sdm845_ufs_phy_clk_l),
@@ -1050,6 +1107,7 @@ static const struct qmp_phy_cfg sm8250_ufsphy_cfg = {
 	.lanes			= 2,
 
 	.offsets		= &qmp_ufs_offsets,
+	.max_supported_gear	= UFS_HS_G4,
 
 	.tbls = {
 		.serdes		= sm8150_ufsphy_serdes,
@@ -1065,13 +1123,14 @@ static const struct qmp_phy_cfg sm8250_ufsphy_cfg = {
 		.serdes		= sm8150_ufsphy_hs_b_serdes,
 		.serdes_num	= ARRAY_SIZE(sm8150_ufsphy_hs_b_serdes),
 	},
-	.tbls_hs_g4 = {
+	.tbls_hs_overlay[0] = {
 		.tx		= sm8250_ufsphy_hs_g4_tx,
 		.tx_num		= ARRAY_SIZE(sm8250_ufsphy_hs_g4_tx),
 		.rx		= sm8250_ufsphy_hs_g4_rx,
 		.rx_num		= ARRAY_SIZE(sm8250_ufsphy_hs_g4_rx),
 		.pcs		= sm8150_ufsphy_hs_g4_pcs,
 		.pcs_num	= ARRAY_SIZE(sm8150_ufsphy_hs_g4_pcs),
+		.max_gear	= UFS_HS_G4,
 	},
 	.clk_list		= sdm845_ufs_phy_clk_l,
 	.num_clks		= ARRAY_SIZE(sdm845_ufs_phy_clk_l),
@@ -1084,6 +1143,7 @@ static const struct qmp_phy_cfg sm8350_ufsphy_cfg = {
 	.lanes			= 2,
 
 	.offsets		= &qmp_ufs_offsets,
+	.max_supported_gear	= UFS_HS_G4,
 
 	.tbls = {
 		.serdes		= sm8350_ufsphy_serdes,
@@ -1099,13 +1159,14 @@ static const struct qmp_phy_cfg sm8350_ufsphy_cfg = {
 		.serdes		= sm8350_ufsphy_hs_b_serdes,
 		.serdes_num	= ARRAY_SIZE(sm8350_ufsphy_hs_b_serdes),
 	},
-	.tbls_hs_g4 = {
+	.tbls_hs_overlay[0] = {
 		.tx		= sm8350_ufsphy_g4_tx,
 		.tx_num		= ARRAY_SIZE(sm8350_ufsphy_g4_tx),
 		.rx		= sm8350_ufsphy_g4_rx,
 		.rx_num		= ARRAY_SIZE(sm8350_ufsphy_g4_rx),
 		.pcs		= sm8350_ufsphy_g4_pcs,
 		.pcs_num	= ARRAY_SIZE(sm8350_ufsphy_g4_pcs),
+		.max_gear	= UFS_HS_G4,
 	},
 	.clk_list		= sdm845_ufs_phy_clk_l,
 	.num_clks		= ARRAY_SIZE(sdm845_ufs_phy_clk_l),
@@ -1118,6 +1179,7 @@ static const struct qmp_phy_cfg sm8450_ufsphy_cfg = {
 	.lanes			= 2,
 
 	.offsets		= &qmp_ufs_offsets,
+	.max_supported_gear	= UFS_HS_G4,
 
 	.tbls = {
 		.serdes		= sm8350_ufsphy_serdes,
@@ -1133,13 +1195,14 @@ static const struct qmp_phy_cfg sm8450_ufsphy_cfg = {
 		.serdes		= sm8350_ufsphy_hs_b_serdes,
 		.serdes_num	= ARRAY_SIZE(sm8350_ufsphy_hs_b_serdes),
 	},
-	.tbls_hs_g4 = {
+	.tbls_hs_overlay[0] = {
 		.tx		= sm8350_ufsphy_g4_tx,
 		.tx_num		= ARRAY_SIZE(sm8350_ufsphy_g4_tx),
 		.rx		= sm8350_ufsphy_g4_rx,
 		.rx_num		= ARRAY_SIZE(sm8350_ufsphy_g4_rx),
 		.pcs		= sm8350_ufsphy_g4_pcs,
 		.pcs_num	= ARRAY_SIZE(sm8350_ufsphy_g4_pcs),
+		.max_gear	= UFS_HS_G4,
 	},
 	.clk_list		= sm8450_ufs_phy_clk_l,
 	.num_clks		= ARRAY_SIZE(sm8450_ufs_phy_clk_l),
@@ -1152,6 +1215,7 @@ static const struct qmp_phy_cfg sm8550_ufsphy_cfg = {
 	.lanes			= 2,
 
 	.offsets		= &qmp_ufs_offsets_v6,
+	.max_supported_gear	= UFS_HS_G5,
 
 	.tbls = {
 		.serdes		= sm8550_ufsphy_serdes,
@@ -1167,6 +1231,26 @@ static const struct qmp_phy_cfg sm8550_ufsphy_cfg = {
 		.serdes		= sm8550_ufsphy_hs_b_serdes,
 		.serdes_num	= ARRAY_SIZE(sm8550_ufsphy_hs_b_serdes),
 	},
+	.tbls_hs_overlay[0] = {
+		.serdes		= sm8550_ufsphy_g4_serdes,
+		.serdes_num	= ARRAY_SIZE(sm8550_ufsphy_g4_serdes),
+		.tx		= sm8550_ufsphy_g4_tx,
+		.tx_num		= ARRAY_SIZE(sm8550_ufsphy_g4_tx),
+		.rx		= sm8550_ufsphy_g4_rx,
+		.rx_num		= ARRAY_SIZE(sm8550_ufsphy_g4_rx),
+		.pcs		= sm8550_ufsphy_g4_pcs,
+		.pcs_num	= ARRAY_SIZE(sm8550_ufsphy_g4_pcs),
+		.max_gear	= UFS_HS_G4,
+	},
+	.tbls_hs_overlay[1] = {
+		.serdes		= sm8550_ufsphy_g5_serdes,
+		.serdes_num	= ARRAY_SIZE(sm8550_ufsphy_g5_serdes),
+		.rx		= sm8550_ufsphy_g5_rx,
+		.rx_num		= ARRAY_SIZE(sm8550_ufsphy_g5_rx),
+		.pcs		= sm8550_ufsphy_g5_pcs,
+		.pcs_num	= ARRAY_SIZE(sm8550_ufsphy_g5_pcs),
+		.max_gear	= UFS_HS_G5,
+	},
 	.clk_list		= sdm845_ufs_phy_clk_l,
 	.num_clks		= ARRAY_SIZE(sdm845_ufs_phy_clk_l),
 	.vreg_list		= qmp_phy_vreg_l,
@@ -1229,17 +1313,63 @@ static void qmp_ufs_pcs_init(struct qmp_ufs *qmp, const struct qmp_phy_cfg_tbls
 	qmp_ufs_configure(pcs, tbls->pcs, tbls->pcs_num);
 }
 
-static void qmp_ufs_init_registers(struct qmp_ufs *qmp, const struct qmp_phy_cfg *cfg)
+static bool qmp_ufs_match_gear_overlay(struct qmp_ufs *qmp, const struct qmp_phy_cfg *cfg, int *i)
+{
+	u32 max_gear, floor_max_gear = cfg->max_supported_gear;
+	bool found = false;
+	int j;
+
+	for (j = 0; j < NUM_OVERLAY; j ++) {
+		max_gear = cfg->tbls_hs_overlay[j].max_gear;
+
+		if (max_gear == 0)
+			continue;
+
+		/* Direct matching, bail */
+		if (qmp->submode == max_gear) {
+			*i = j;
+			return true;
+		}
+
+		/* If no direct matching, the lowest gear is the best matching */
+		if (max_gear < floor_max_gear) {
+			*i = j;
+			found = true;
+			floor_max_gear = max_gear;
+		}
+	}
+
+	return found;
+}
+
+static int qmp_ufs_init_registers(struct qmp_ufs *qmp, const struct qmp_phy_cfg *cfg)
 {
+	bool apply_overlay;
+	int i;
+
+	if (qmp->submode > cfg->max_supported_gear || qmp->submode == 0) {
+		dev_err(qmp->dev, "Invalid PHY submode %u\n", qmp->submode);
+		return -EINVAL;
+	}
+
+	apply_overlay = qmp_ufs_match_gear_overlay(qmp, cfg, &i);
+
 	qmp_ufs_serdes_init(qmp, &cfg->tbls);
+	if (apply_overlay)
+		qmp_ufs_serdes_init(qmp, &cfg->tbls_hs_overlay[i]);
+
 	if (qmp->mode == PHY_MODE_UFS_HS_B)
 		qmp_ufs_serdes_init(qmp, &cfg->tbls_hs_b);
+
 	qmp_ufs_lanes_init(qmp, &cfg->tbls);
-	if (qmp->submode == UFS_HS_G4)
-		qmp_ufs_lanes_init(qmp, &cfg->tbls_hs_g4);
+	if (apply_overlay)
+		qmp_ufs_lanes_init(qmp, &cfg->tbls_hs_overlay[i]);
+
 	qmp_ufs_pcs_init(qmp, &cfg->tbls);
-	if (qmp->submode == UFS_HS_G4)
-		qmp_ufs_pcs_init(qmp, &cfg->tbls_hs_g4);
+	if (apply_overlay)
+		qmp_ufs_pcs_init(qmp, &cfg->tbls_hs_overlay[i]);
+
+	return 0;
 }
 
 static int qmp_ufs_com_init(struct qmp_ufs *qmp)
@@ -1331,7 +1461,9 @@ static int qmp_ufs_power_on(struct phy *phy)
 	unsigned int val;
 	int ret;
 
-	qmp_ufs_init_registers(qmp, cfg);
+	ret = qmp_ufs_init_registers(qmp, cfg);
+	if (ret)
+		return ret;
 
 	ret = reset_control_deassert(qmp->ufs_reset);
 	if (ret)
-- 
2.7.4