linux-kernel - [PATCH V1] phy: qcom-qmp-ufs: check for mode type for phy setting

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Message-ID: <20250407121008.22230-1-quic_nitirawa@quicinc.com>
Date: Mon,  7 Apr 2025 17:40:08 +0530
From: Nitin Rawat <quic_nitirawa@...cinc.com>
To: vkoul@...nel.org, kishon@...nel.org, manivannan.sadhasivam@...aro.org,
        quic_mapa@...cinc.com, neil.armstrong@...aro.org,
        konrad.dybcio@....qualcomm.com
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Nitin Rawat <quic_nitirawa@...cinc.com>
Subject: [PATCH V1] phy: qcom-qmp-ufs: check for mode type for phy setting

Generally all target supports Rate B but for very few like SM8550,
two sets of UFS PHY settings are provided, one set is to support
HS-G5 Rate A and another set is to support HS-G4 and lower
gears with Rate B.

Commit b02cc9a17679("phy: qcom-qmp-ufs: Add PHY Configuration support
for sm8750") apply Rate B setting for SM8550 gear 5 without checking
for mode value (Rate A or Rate B) from Controller driver which caused
issue as SM8550 support rate A for Gear 5.

Fix this by adding mode check before applying Rat B phy setting.

Fixes: b02cc9a17679 ("phy: qcom-qmp-ufs: Add PHY Configuration support for sm8750")
Reported-by: Neil Armstrong <neil.armstrong@...aro.org>
Closes: https://lore.kernel.org/all/430ed11c-0490-45be-897b-27cad9682371@quicinc.com/
Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on SM8550-QRD
Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
---
 drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
index 45b3b792696e..b33e2e2b5014 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
@@ -1754,7 +1754,8 @@ static void qmp_ufs_init_registers(struct qmp_ufs *qmp, const struct qmp_phy_cfg
 		qmp_ufs_init_all(qmp, &cfg->tbls_hs_overlay[i]);
 	}

-	qmp_ufs_init_all(qmp, &cfg->tbls_hs_b);
+	if (qmp->mode == PHY_MODE_UFS_HS_B)
+		qmp_ufs_init_all(qmp, &cfg->tbls_hs_b);
 }

 static int qmp_ufs_com_init(struct qmp_ufs *qmp)
--
2.48.1