[PATCH v2 0/2] Update PCIe PHY settings for SA8775P

[PATCH v2 0/2] Update PCIe PHY settings for SA8775P

[Mrinmay Sarkar]

This Series is to update PCIe PHY settings as per latest
hardware programming guide and remove max link speed dt 
property for SA8775P PCIe EP.

Signed-off-by: Mrinmay Sarkar <quic_msarkar@quicinc.com>
---
v1 -> v2:
- Update commit message as per the review comments.
- Remove max-link-speed DT property.

---
Mrinmay Sarkar (2):
      phy: qcom: qmp-pcie: Update PHY settings for SA8775P
      arm64: dts: qcom: sa8775p: Remove max link speed property for PCIe EP

 arch/arm64/boot/dts/qcom/sa8775p.dtsi              |  2 -
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c           | 89 ++++++++++++----------
 drivers/phy/qualcomm/phy-qcom-qmp-pcs-pcie-v5_20.h |  2 +
 drivers/phy/qualcomm/phy-qcom-qmp-pcs-v5_20.h      |  4 +
 .../phy/qualcomm/phy-qcom-qmp-qserdes-ln-shrd-v5.h | 11 +++
 drivers/phy/qualcomm/phy-qcom-qmp.h                |  1 +
 6 files changed, 66 insertions(+), 43 deletions(-)
---
base-commit: edef457004774e598fc4c1b7d1d4f0bcd9d0bb30
change-id: 20250513-update_phy-2cd804dd2401

Best regards,
-- 
Mrinmay Sarkar <quic_msarkar@quicinc.com>

[PATCH v2 1/2] phy: qcom: qmp-pcie: Update PHY settings for SA8775P

[Mrinmay Sarkar]

From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>

Make changes to update the PHY settings to align with the latest
PCIe PHY Hardware Programming Guide for both PCIe controllers
on the SA8775P platform.

Add the ln_shrd region for SA8775P, incorporating new register
writes as specified in the updated Hardware Programming Guide.

Update pcs table for QCS8300, since both QCS8300 and SA8775P are
closely related and share same pcs settings.

Signed-off-by: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c           | 89 ++++++++++++----------
 drivers/phy/qualcomm/phy-qcom-qmp-pcs-pcie-v5_20.h |  2 +
 drivers/phy/qualcomm/phy-qcom-qmp-pcs-v5_20.h      |  4 +
 .../phy/qualcomm/phy-qcom-qmp-qserdes-ln-shrd-v5.h | 11 +++
 drivers/phy/qualcomm/phy-qcom-qmp.h                |  1 +
 5 files changed, 66 insertions(+), 41 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index ab90aafb313e6e759c0f88589013632bb6277807..cf7122a2b8bac3af591daceba01be1bb791c53cd 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -2639,29 +2639,29 @@ static const struct qmp_phy_init_tbl sa8775p_qmp_gen4x2_pcie_rc_serdes_alt_tbl[]
 };
 
 static const struct qmp_phy_init_tbl sa8775p_qmp_gen4x2_pcie_rx_alt_tbl[] = {
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_UCDR_PI_CONTROLS, 0x16),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_UCDR_PI_CONTROLS, 0x07),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_DFE_CTLE_POST_CAL_OFFSET, 0x38),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B0, 0x9a),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B0, 0x9b),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B1, 0xb0),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B2, 0x92),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B2, 0xe4),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B3, 0xf0),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B4, 0x42),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B5, 0x99),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B6, 0x29),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B0, 0x9a),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B5, 0x00),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B6, 0x20),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B0, 0x9b),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B1, 0xfb),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B2, 0x92),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B2, 0xe4),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B3, 0xec),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B4, 0x43),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B5, 0xdd),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B6, 0x0d),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B0, 0xf3),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B0, 0xb3),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B1, 0xf8),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B2, 0xec),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B3, 0xd6),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B4, 0x83),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B5, 0xf5),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B6, 0x5e),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B2, 0xed),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B3, 0xe5),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B4, 0x8d),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B5, 0xd6),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B6, 0x7e),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_PHPRE_CTRL, 0x20),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_AUX_DATA_THRESH_BIN_RATE_0_1, 0x3f),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_AUX_DATA_THRESH_BIN_RATE_2_3, 0x37),
@@ -2680,12 +2680,12 @@ static const struct qmp_phy_init_tbl sa8775p_qmp_gen4x2_pcie_rx_alt_tbl[] = {
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_UCDR_FO_GAIN_RATE3, 0x08),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_UCDR_SO_GAIN_RATE3, 0x04),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_VGA_CAL_CNTRL1, 0x04),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_VGA_CAL_MAN_VAL, 0x08),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_EQU_ADAPTOR_CNTRL4, 0x0b),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_VGA_CAL_MAN_VAL, 0x03),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_EQU_ADAPTOR_CNTRL4, 0x08),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_EQ_OFFSET_ADAPTOR_CNTRL1, 0x7c),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_IDAC_SAOFFSET, 0x10),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_DFE_DAC_ENABLE1, 0x00),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_GM_CAL, 0x05),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_GM_CAL, 0x01),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_TX_ADAPT_POST_THRESH1, 0x00),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_TX_ADAPT_POST_THRESH2, 0x1f),
 };
@@ -2699,6 +2699,8 @@ static const struct qmp_phy_init_tbl sa8775p_qmp_gen4_pcie_tx_tbl[] = {
 };
 
 static const struct qmp_phy_init_tbl sa8775p_qmp_gen4_pcie_pcs_misc_tbl[] = {
+	QMP_PHY_INIT_CFG(QPHY_PCIE_V5_20_PCS_G3_RXEQEVAL_TIME, 0x27),
+	QMP_PHY_INIT_CFG(QPHY_PCIE_V5_20_PCS_G4_RXEQEVAL_TIME, 0x27),
 	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_PCIE_EQ_CONFIG1, 0x16),
 	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_PCIE_G4_EQ_CONFIG5, 0x02),
 	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_PCIE_G4_PRE_GAIN, 0x2e),
@@ -2711,11 +2713,19 @@ static const struct qmp_phy_init_tbl sa8775p_qmp_gen4_pcie_rc_pcs_misc_tbl[] = {
 	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_PCIE_OSC_DTCT_ACTIONS, 0x00),
 };
 
-static const struct qmp_phy_init_tbl sa8775p_qmp_gen4x2_pcie_pcs_alt_tbl[] = {
+static const struct qmp_phy_init_tbl sa8775p_qmp_gen4_pcie_pcs_alt_tbl[] = {
 	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_EQ_CONFIG4, 0x16),
 	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_EQ_CONFIG5, 0x22),
 	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_G3S2_PRE_GAIN, 0x2e),
 	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_RX_SIGDET_LVL, 0x66),
+	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_LOCK_DETECT_CONFIG1, 0xff),
+	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_LOCK_DETECT_CONFIG2, 0x89),
+	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_ALIGN_DETECT_CONFIG1, 0x00),
+	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_ALIGN_DETECT_CONFIG2, 0x50),
+};
+
+static const struct qmp_phy_init_tbl sa8775p_qmp_gen4x2_pcie_ln_shrd_tbl[] = {
+	QMP_PHY_INIT_CFG(QSERDES_v5_LN_SHRD_UCDR_PI_CTRL2, 0x00),
 };
 
 static const struct qmp_phy_init_tbl sa8775p_qmp_gen4x4_pcie_rx_alt_tbl[] = {
@@ -2739,27 +2749,27 @@ static const struct qmp_phy_init_tbl sa8775p_qmp_gen4x4_pcie_rx_alt_tbl[] = {
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MARG_COARSE_THRESH5_RATE3, 0x1f),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MARG_COARSE_THRESH6_RATE3, 0x1f),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_Q_PI_INTRINSIC_BIAS_RATE32, 0x09),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B0, 0x99),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B0, 0x9b),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B1, 0xb0),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B2, 0x92),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B2, 0xd2),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B3, 0xf0),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B4, 0x42),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B5, 0x00),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE_0_1_B6, 0x20),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B0, 0x9a),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B0, 0x9b),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B1, 0xb6),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B2, 0x92),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B2, 0xd2),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B3, 0xf0),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B4, 0x43),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B5, 0xdd),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE2_B6, 0x0d),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B0, 0xf3),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B0, 0xb3),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B1, 0xf6),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B2, 0xee),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B3, 0xd2),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B2, 0xe4),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B3, 0xe6),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B4, 0x83),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B5, 0xf9),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B6, 0x3d),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B5, 0xd6),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_MODE_RATE3_B6, 0x7e),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_TX_ADAPT_POST_THRESH1, 0x00),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_TX_ADAPT_POST_THRESH2, 0x1f),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_UCDR_FO_GAIN_RATE2, 0x0c),
@@ -2767,14 +2777,7 @@ static const struct qmp_phy_init_tbl sa8775p_qmp_gen4x4_pcie_rx_alt_tbl[] = {
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_UCDR_SO_GAIN_RATE3, 0x04),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_UCDR_PI_CONTROLS, 0x16),
 	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_VGA_CAL_CNTRL1, 0x04),
-	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_VGA_CAL_MAN_VAL, 0x08),
-};
-
-static const struct qmp_phy_init_tbl sa8775p_qmp_gen4x4_pcie_pcs_alt_tbl[] = {
-	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_EQ_CONFIG4, 0x16),
-	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_EQ_CONFIG5, 0x22),
-	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_G3S2_PRE_GAIN, 0x2e),
-	QMP_PHY_INIT_CFG(QPHY_V5_20_PCS_RX_SIGDET_LVL, 0x66),
+	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_VGA_CAL_MAN_VAL, 0x06),
 };
 
 static const struct qmp_phy_init_tbl sa8775p_qmp_gen4x4_pcie_serdes_alt_tbl[] = {
@@ -3191,6 +3194,7 @@ static const struct qmp_pcie_offsets qmp_pcie_offsets_v5_20 = {
 	.rx		= 0x0200,
 	.tx2		= 0x0800,
 	.rx2		= 0x0a00,
+	.ln_shrd	= 0x0e00,
 };
 
 static const struct qmp_pcie_offsets qmp_pcie_offsets_v5_30 = {
@@ -3398,8 +3402,8 @@ static const struct qmp_phy_cfg qcs8300_qmp_gen4x2_pciephy_cfg = {
 		.tx_num		= ARRAY_SIZE(sa8775p_qmp_gen4_pcie_tx_tbl),
 		.rx		= qcs8300_qmp_gen4x2_pcie_rx_alt_tbl,
 		.rx_num		= ARRAY_SIZE(qcs8300_qmp_gen4x2_pcie_rx_alt_tbl),
-		.pcs		= sa8775p_qmp_gen4x2_pcie_pcs_alt_tbl,
-		.pcs_num		= ARRAY_SIZE(sa8775p_qmp_gen4x2_pcie_pcs_alt_tbl),
+		.pcs		= sa8775p_qmp_gen4_pcie_pcs_alt_tbl,
+		.pcs_num	= ARRAY_SIZE(sa8775p_qmp_gen4_pcie_pcs_alt_tbl),
 		.pcs_misc		= sa8775p_qmp_gen4_pcie_pcs_misc_tbl,
 		.pcs_misc_num	= ARRAY_SIZE(sa8775p_qmp_gen4_pcie_pcs_misc_tbl),
 	},
@@ -4067,12 +4071,15 @@ static const struct qmp_phy_cfg sa8775p_qmp_gen4x2_pciephy_cfg = {
 		.tx_num		= ARRAY_SIZE(sa8775p_qmp_gen4_pcie_tx_tbl),
 		.rx		= sa8775p_qmp_gen4x2_pcie_rx_alt_tbl,
 		.rx_num		= ARRAY_SIZE(sa8775p_qmp_gen4x2_pcie_rx_alt_tbl),
-		.pcs		= sa8775p_qmp_gen4x2_pcie_pcs_alt_tbl,
-		.pcs_num		= ARRAY_SIZE(sa8775p_qmp_gen4x2_pcie_pcs_alt_tbl),
-		.pcs_misc		= sa8775p_qmp_gen4_pcie_pcs_misc_tbl,
+		.pcs		= sa8775p_qmp_gen4_pcie_pcs_alt_tbl,
+		.pcs_num	= ARRAY_SIZE(sa8775p_qmp_gen4_pcie_pcs_alt_tbl),
+		.pcs_misc	= sa8775p_qmp_gen4_pcie_pcs_misc_tbl,
 		.pcs_misc_num	= ARRAY_SIZE(sa8775p_qmp_gen4_pcie_pcs_misc_tbl),
 		.pcs_lane1	= sdx65_qmp_pcie_pcs_lane1_tbl,
 		.pcs_lane1_num	= ARRAY_SIZE(sdx65_qmp_pcie_pcs_lane1_tbl),
+		.ln_shrd		= sa8775p_qmp_gen4x2_pcie_ln_shrd_tbl,
+		.ln_shrd_num		= ARRAY_SIZE(sa8775p_qmp_gen4x2_pcie_ln_shrd_tbl),
+
 	},
 
 	.tbls_rc = &(const struct qmp_phy_cfg_tbls) {
@@ -4112,8 +4119,8 @@ static const struct qmp_phy_cfg sa8775p_qmp_gen4x4_pciephy_cfg = {
 		.tx_num		= ARRAY_SIZE(sa8775p_qmp_gen4_pcie_tx_tbl),
 		.rx			= sa8775p_qmp_gen4x4_pcie_rx_alt_tbl,
 		.rx_num		= ARRAY_SIZE(sa8775p_qmp_gen4x4_pcie_rx_alt_tbl),
-		.pcs		= sa8775p_qmp_gen4x4_pcie_pcs_alt_tbl,
-		.pcs_num		= ARRAY_SIZE(sa8775p_qmp_gen4x4_pcie_pcs_alt_tbl),
+		.pcs		= sa8775p_qmp_gen4_pcie_pcs_alt_tbl,
+		.pcs_num	= ARRAY_SIZE(sa8775p_qmp_gen4_pcie_pcs_alt_tbl),
 		.pcs_misc		= sa8775p_qmp_gen4_pcie_pcs_misc_tbl,
 		.pcs_misc_num	= ARRAY_SIZE(sa8775p_qmp_gen4_pcie_pcs_misc_tbl),
 	},
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcs-pcie-v5_20.h b/drivers/phy/qualcomm/phy-qcom-qmp-pcs-pcie-v5_20.h
index 283d63c8159338b57a5026b6c2a86e3cce21097c..951de964dc1242a15efee135266ddeb10ce598df 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcs-pcie-v5_20.h
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcs-pcie-v5_20.h
@@ -13,6 +13,8 @@
 #define QPHY_V5_20_PCS_PCIE_OSC_DTCT_ACTIONS		0x090
 #define QPHY_V5_20_PCS_PCIE_EQ_CONFIG1			0x0a0
 #define QPHY_V5_20_PCS_PCIE_PRESET_P10_POST		0x0e0
+#define QPHY_PCIE_V5_20_PCS_G3_RXEQEVAL_TIME		0x0f0
+#define QPHY_PCIE_V5_20_PCS_G4_RXEQEVAL_TIME		0x0f4
 #define QPHY_V5_20_PCS_PCIE_G4_EQ_CONFIG2		0x0fc
 #define QPHY_V5_20_PCS_PCIE_G4_EQ_CONFIG5		0x108
 #define QPHY_V5_20_PCS_PCIE_G4_PRE_GAIN			0x15c
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcs-v5_20.h b/drivers/phy/qualcomm/phy-qcom-qmp-pcs-v5_20.h
index d3ad5b7f54259f27aa5e97991b9d7372e378cddb..bbee68df4e143b187ae02b5148be63ef7e37ef59 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcs-v5_20.h
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcs-v5_20.h
@@ -8,8 +8,12 @@
 
 #define QPHY_V5_20_PCS_INSIG_SW_CTRL7			0x060
 #define QPHY_V5_20_PCS_INSIG_MX_CTRL7			0x07c
+#define QPHY_V5_20_PCS_LOCK_DETECT_CONFIG1		0x0c4
+#define QPHY_V5_20_PCS_LOCK_DETECT_CONFIG2		0x0c8
 #define QPHY_V5_20_PCS_G3S2_PRE_GAIN			0x170
 #define QPHY_V5_20_PCS_RX_SIGDET_LVL			0x188
+#define QPHY_V5_20_PCS_ALIGN_DETECT_CONFIG1		0x1b8
+#define QPHY_V5_20_PCS_ALIGN_DETECT_CONFIG2		0x1bc
 #define QPHY_V5_20_PCS_EQ_CONFIG2			0x1d8
 #define QPHY_V5_20_PCS_EQ_CONFIG4			0x1e0
 #define QPHY_V5_20_PCS_EQ_CONFIG5			0x1e4
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-ln-shrd-v5.h b/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-ln-shrd-v5.h
new file mode 100644
index 0000000000000000000000000000000000000000..68c38fdfc1d826f1ca986469932ef6c0835248db
--- /dev/null
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-qserdes-ln-shrd-v5.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2025, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef QCOM_PHY_QMP_QSERDES_LN_SHRD_V5_H_
+#define QCOM_PHY_QMP_QSERDES_LN_SHRD_V5_H_
+
+#define  QSERDES_v5_LN_SHRD_UCDR_PI_CTRL2		0x04c
+
+#endif
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.h b/drivers/phy/qualcomm/phy-qcom-qmp.h
index d0f41e4aaa855fc3ee088afc833b214277b7e2b0..6a7ae5199bba6f34d228ace15ab2b452fc0d50a9 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.h
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.h
@@ -25,6 +25,7 @@
 #include "phy-qcom-qmp-qserdes-txrx-v6.h"
 #include "phy-qcom-qmp-qserdes-txrx-v6_20.h"
 #include "phy-qcom-qmp-qserdes-txrx-v6_n4.h"
+#include "phy-qcom-qmp-qserdes-ln-shrd-v5.h"
 #include "phy-qcom-qmp-qserdes-ln-shrd-v6.h"
 
 #include "phy-qcom-qmp-qserdes-com-v7.h"

-- 
2.25.1

[PATCH v2 2/2] arm64: dts: qcom: sa8775p: Remove max link speed property for PCIe EP

[Mrinmay Sarkar]

From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>

The maximum link speed was previously restricted to Gen3 due to the
absence of Gen4 equalization support in the driver.

Add change to remove max link speed property, Since Gen4 equalization
support has already been added into the driver.

Signed-off-by: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/sa8775p.dtsi | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
index 5bd0c03476b143444543c68cd1c1d475c3302555..b001e9a30e863d8964219c8bd61bc328be71b256 100644
--- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
+++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
@@ -6462,7 +6462,6 @@ pcie0_ep: pcie-ep@1c00000 {
 		power-domains = <&gcc PCIE_0_GDSC>;
 		phys = <&pcie0_phy>;
 		phy-names = "pciephy";
-		max-link-speed = <3>; /* FIXME: Limiting the Gen speed due to stability issues */
 		num-lanes = <2>;
 		linux,pci-domain = <0>;
 
@@ -6620,7 +6619,6 @@ pcie1_ep: pcie-ep@1c10000 {
 		power-domains = <&gcc PCIE_1_GDSC>;
 		phys = <&pcie1_phy>;
 		phy-names = "pciephy";
-		max-link-speed = <3>; /* FIXME: Limiting the Gen speed due to stability issues */
 		num-lanes = <4>;
 		linux,pci-domain = <1>;
 

-- 
2.25.1

Re: [PATCH v2 2/2] arm64: dts: qcom: sa8775p: Remove max link speed property for PCIe EP

[neil.armstrong]

On 14/05/2025 13:37, Mrinmay Sarkar wrote:
> From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
> 
> The maximum link speed was previously restricted to Gen3 due to the
> absence of Gen4 equalization support in the driver.
> 
> Add change to remove max link speed property, Since Gen4 equalization
> support has already been added into the driver.

Which driver, PHY or Controller ? does this change depends on the patch 1 PHY settings update ?

> 
> Signed-off-by: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
> ---
>   arch/arm64/boot/dts/qcom/sa8775p.dtsi | 2 --
>   1 file changed, 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> index 5bd0c03476b143444543c68cd1c1d475c3302555..b001e9a30e863d8964219c8bd61bc328be71b256 100644
> --- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> @@ -6462,7 +6462,6 @@ pcie0_ep: pcie-ep@1c00000 {
>   		power-domains = <&gcc PCIE_0_GDSC>;
>   		phys = <&pcie0_phy>;
>   		phy-names = "pciephy";
> -		max-link-speed = <3>; /* FIXME: Limiting the Gen speed due to stability issues */
>   		num-lanes = <2>;
>   		linux,pci-domain = <0>;
>   
> @@ -6620,7 +6619,6 @@ pcie1_ep: pcie-ep@1c10000 {
>   		power-domains = <&gcc PCIE_1_GDSC>;
>   		phys = <&pcie1_phy>;
>   		phy-names = "pciephy";
> -		max-link-speed = <3>; /* FIXME: Limiting the Gen speed due to stability issues */
>   		num-lanes = <4>;
>   		linux,pci-domain = <1>;
>   
> 

Re: [PATCH v2 1/2] phy: qcom: qmp-pcie: Update PHY settings for SA8775P

[neil.armstrong]

Hi,

On 14/05/2025 13:37, Mrinmay Sarkar wrote:
> From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
> 
> Make changes to update the PHY settings to align with the latest
> PCIe PHY Hardware Programming Guide for both PCIe controllers
> on the SA8775P platform.
> 
> Add the ln_shrd region for SA8775P, incorporating new register
> writes as specified in the updated Hardware Programming Guide.
> 
> Update pcs table for QCS8300, since both QCS8300 and SA8775P are
> closely related and share same pcs settings.
> 
> Signed-off-by: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
> ---
>   drivers/phy/qualcomm/phy-qcom-qmp-pcie.c           | 89 ++++++++++++----------
>   drivers/phy/qualcomm/phy-qcom-qmp-pcs-pcie-v5_20.h |  2 +
>   drivers/phy/qualcomm/phy-qcom-qmp-pcs-v5_20.h      |  4 +
>   .../phy/qualcomm/phy-qcom-qmp-qserdes-ln-shrd-v5.h | 11 +++
>   drivers/phy/qualcomm/phy-qcom-qmp.h                |  1 +
>   5 files changed, 66 insertions(+), 41 deletions(-

I think the subject should be "Update PHY settings for QCS8300 & SA8775P".

As my comment on patch 2, what's the relationship ? does those PHY settings fix
the "Gen4 stability issues" or are needed for the Gen4 equalization ?

Thanks,
Neil

Re: [PATCH v2 2/2] arm64: dts: qcom: sa8775p: Remove max link speed property for PCIe EP

[Konrad Dybcio]

On 5/14/25 6:38 PM, neil.armstrong@linaro.org wrote:
> On 14/05/2025 13:37, Mrinmay Sarkar wrote:
>> From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
>>
>> The maximum link speed was previously restricted to Gen3 due to the
>> absence of Gen4 equalization support in the driver.
>>
>> Add change to remove max link speed property, Since Gen4 equalization
>> support has already been added into the driver.
> 
> Which driver, PHY or Controller ?

Controller, see 

09483959e34d ("PCI: dwc: Add support for configuring lane equalization presets")

and commits around it

does this change depends on the patch 1 PHY settings update ?

That I'm curious about too, but I would guesstimate no

Konrad

Re: [PATCH v2 2/2] arm64: dts: qcom: sa8775p: Remove max link speed property for PCIe EP

[Mrinmay Sarkar]

On Fri, May 16, 2025 at 2:30 PM Konrad Dybcio
<konrad.dybcio@oss.qualcomm.com> wrote:
>
> On 5/14/25 6:38 PM, neil.armstrong@linaro.org wrote:
> > On 14/05/2025 13:37, Mrinmay Sarkar wrote:
> >> From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
> >>
> >> The maximum link speed was previously restricted to Gen3 due to the
> >> absence of Gen4 equalization support in the driver.
> >>
> >> Add change to remove max link speed property, Since Gen4 equalization
> >> support has already been added into the driver.
> >
> > Which driver, PHY or Controller ?
>
> Controller, see
>
> 09483959e34d ("PCI: dwc: Add support for configuring lane equalization presets")

Yes, this patch is helping to solve gen4 stability issue.
>
> and commits around it
>
> does this change depends on the patch 1 PHY settings update ?
>
> That I'm curious about too, but I would guesstimate no
>
this change doesn't depends on the patch 1 PHY settings update

> Konrad

Mrinmay

Re: [PATCH v2 2/2] arm64: dts: qcom: sa8775p: Remove max link speed property for PCIe EP

[Dmitry Baryshkov]

On Fri, May 16, 2025 at 03:59:02PM +0530, Mrinmay Sarkar wrote:
> On Fri, May 16, 2025 at 2:30 PM Konrad Dybcio
> <konrad.dybcio@oss.qualcomm.com> wrote:
> >
> > On 5/14/25 6:38 PM, neil.armstrong@linaro.org wrote:
> > > On 14/05/2025 13:37, Mrinmay Sarkar wrote:
> > >> From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
> > >>
> > >> The maximum link speed was previously restricted to Gen3 due to the
> > >> absence of Gen4 equalization support in the driver.
> > >>
> > >> Add change to remove max link speed property, Since Gen4 equalization
> > >> support has already been added into the driver.
> > >
> > > Which driver, PHY or Controller ?
> >
> > Controller, see
> >
> > 09483959e34d ("PCI: dwc: Add support for configuring lane equalization presets")
> 
> Yes, this patch is helping to solve gen4 stability issue.
> >
> > and commits around it
> >
> > does this change depends on the patch 1 PHY settings update ?
> >
> > That I'm curious about too, but I would guesstimate no
> >
> this change doesn't depends on the patch 1 PHY settings update

Then what has changed, as previously it was documented to have stability
issues.

-- 
With best wishes
Dmitry

Re: [PATCH v2 1/2] phy: qcom: qmp-pcie: Update PHY settings for SA8775P

[Konrad Dybcio]

On 5/14/25 1:37 PM, Mrinmay Sarkar wrote:
> From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
> 
> Make changes to update the PHY settings to align with the latest
> PCIe PHY Hardware Programming Guide for both PCIe controllers
> on the SA8775P platform.
> 
> Add the ln_shrd region for SA8775P, incorporating new register
> writes as specified in the updated Hardware Programming Guide.
> 
> Update pcs table for QCS8300, since both QCS8300 and SA8775P are
> closely related and share same pcs settings.
> 
> Signed-off-by: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
> ---

So I took a closer look and please re-validate the changes, I
checked one write randomly and it turned out to be inconsistent

[...]


> -	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_VGA_CAL_MAN_VAL, 0x08),
> -	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_EQU_ADAPTOR_CNTRL4, 0x0b),
> +	QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_VGA_CAL_MAN_VAL, 0x03),

^ this should be 0x0a according to reference v1.19 for RC mode

Konrad

Re: [PATCH v2 2/2] arm64: dts: qcom: sa8775p: Remove max link speed property for PCIe EP

[Mrinmay Sarkar]

On Sat, May 17, 2025 at 3:33 AM Dmitry Baryshkov
<dmitry.baryshkov@oss.qualcomm.com> wrote:
>
> On Fri, May 16, 2025 at 03:59:02PM +0530, Mrinmay Sarkar wrote:
> > On Fri, May 16, 2025 at 2:30 PM Konrad Dybcio
> > <konrad.dybcio@oss.qualcomm.com> wrote:
> > >
> > > On 5/14/25 6:38 PM, neil.armstrong@linaro.org wrote:
> > > > On 14/05/2025 13:37, Mrinmay Sarkar wrote:
> > > >> From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
> > > >>
> > > >> The maximum link speed was previously restricted to Gen3 due to the
> > > >> absence of Gen4 equalization support in the driver.
> > > >>
> > > >> Add change to remove max link speed property, Since Gen4 equalization
> > > >> support has already been added into the driver.
> > > >
> > > > Which driver, PHY or Controller ?
> > >
> > > Controller, see
> > >
> > > 09483959e34d ("PCI: dwc: Add support for configuring lane equalization presets")
> >
> > Yes, this patch is helping to solve gen4 stability issue.
> > >
> > > and commits around it
> > >
> > > does this change depends on the patch 1 PHY settings update ?
> > >
> > > That I'm curious about too, but I would guesstimate no
> > >
> > this change doesn't depends on the patch 1 PHY settings update
>
> Then what has changed, as previously it was documented to have stability
> issues.
>
Actually this controller change is solving the stability issue with
gen4: "PCI: qcom: Add equalization settings for 16.0 GT/s"
https://lore.kernel.org/linux-pci/20240911-pci-qcom-gen4-stability-v7-3-743f5c1fd027@linaro.org/

Thanks,
Mrinmay
> --
> With best wishes
> Dmitry

Re: [PATCH v2 2/2] arm64: dts: qcom: sa8775p: Remove max link speed property for PCIe EP

[Neil Armstrong]

On 19/05/2025 14:16, Mrinmay Sarkar wrote:
> On Sat, May 17, 2025 at 3:33 AM Dmitry Baryshkov
> <dmitry.baryshkov@oss.qualcomm.com> wrote:
>>
>> On Fri, May 16, 2025 at 03:59:02PM +0530, Mrinmay Sarkar wrote:
>>> On Fri, May 16, 2025 at 2:30 PM Konrad Dybcio
>>> <konrad.dybcio@oss.qualcomm.com> wrote:
>>>>
>>>> On 5/14/25 6:38 PM, neil.armstrong@linaro.org wrote:
>>>>> On 14/05/2025 13:37, Mrinmay Sarkar wrote:
>>>>>> From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
>>>>>>
>>>>>> The maximum link speed was previously restricted to Gen3 due to the
>>>>>> absence of Gen4 equalization support in the driver.
>>>>>>
>>>>>> Add change to remove max link speed property, Since Gen4 equalization
>>>>>> support has already been added into the driver.
>>>>>
>>>>> Which driver, PHY or Controller ?
>>>>
>>>> Controller, see
>>>>
>>>> 09483959e34d ("PCI: dwc: Add support for configuring lane equalization presets")
>>>
>>> Yes, this patch is helping to solve gen4 stability issue.
>>>>
>>>> and commits around it
>>>>
>>>> does this change depends on the patch 1 PHY settings update ?
>>>>
>>>> That I'm curious about too, but I would guesstimate no
>>>>
>>> this change doesn't depends on the patch 1 PHY settings update
>>
>> Then what has changed, as previously it was documented to have stability
>> issues.
>>
> Actually this controller change is solving the stability issue with
> gen4: "PCI: qcom: Add equalization settings for 16.0 GT/s"
> https://lore.kernel.org/linux-pci/20240911-pci-qcom-gen4-stability-v7-3-743f5c1fd027@linaro.org/

Ok so those patches should be send separately and will reduce maintainers work
by trying to figure out if there's a dependency.

Neil

> 
> Thanks,
> Mrinmay
>> --
>> With best wishes
>> Dmitry

Re: [PATCH v2 1/2] phy: qcom: qmp-pcie: Update PHY settings for SA8775P

[Konrad Dybcio]

On 5/19/25 2:25 PM, Mrinmay Sarkar wrote:
> On Sat, May 17, 2025 at 11:46 PM Konrad Dybcio <
> konrad.dybcio@oss.qualcomm.com> wrote:
>>
>> On 5/14/25 1:37 PM, Mrinmay Sarkar wrote:
>>> From: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
>>>
>>> Make changes to update the PHY settings to align with the latest
>>> PCIe PHY Hardware Programming Guide for both PCIe controllers
>>> on the SA8775P platform.
>>>
>>> Add the ln_shrd region for SA8775P, incorporating new register
>>> writes as specified in the updated Hardware Programming Guide.
>>>
>>> Update pcs table for QCS8300, since both QCS8300 and SA8775P are
>>> closely related and share same pcs settings.
>>>
>>> Signed-off-by: Mrinmay Sarkar <mrinmay.sarkar@oss.qualcomm.com>
>>> ---
>>
>> So I took a closer look and please re-validate the changes, I
>> checked one write randomly and it turned out to be inconsistent
>>
>> [...]
>>
>>
>>> -     QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_VGA_CAL_MAN_VAL, 0x08),
>>> -     QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_RX_EQU_ADAPTOR_CNTRL4, 0x0b),
>>> +     QMP_PHY_INIT_CFG(QSERDES_V5_20_RX_VGA_CAL_MAN_VAL, 0x03),
>>
>> ^ this should be 0x0a according to reference v1.19 for RC mode
>>
> As per v1.19 for SA8775 RC mode I can see the value for this is 0x03 only.

Ah right, the docs are structured in a confusing way..

Konrad