linux-kernel - [PATCH v2 5/7] scsi: ufs: ufs-qcom: Set initial PHY gear to max HS gear for HW ver 5 and newer

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Date:   Mon,  6 Nov 2023 20:46:11 -0800
From:   Can Guo <cang@....qualcomm.com>
To:     quic_cang@...cinc.com, bvanassche@....org, mani@...nel.org,
        stanley.chu@...iatek.com, adrian.hunter@...el.com,
        beanhuo@...ron.com, avri.altman@....com, junwoo80.lee@...sung.com,
        martin.petersen@...cle.com
Cc:     linux-scsi@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        linux-arm-msm@...r.kernel.org (open list:UNIVERSAL FLASH STORAGE HOST
        CONTROLLER DRIVER...), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 5/7] scsi: ufs: ufs-qcom: Set initial PHY gear to max HS gear for HW ver 5 and newer

From: Can Guo <quic_cang@...cinc.com>

Set the initial PHY gear to max HS gear for hosts with HW ver 5 and newer.

This patch is not changing any functionalities or logic but only a
preparation patch for the next patch in this series.

Signed-off-by: Can Guo <quic_cang@...cinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 55ee31d..94d34b5 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1069,6 +1069,14 @@ static void ufs_qcom_set_host_params(struct ufs_hba *hba)
 
 	/* This driver only supports symmetic gear setting i.e., hs_tx_gear == hs_rx_gear */
 	host_params->hs_tx_gear = host_params->hs_rx_gear = ufs_qcom_get_hs_gear(hba);
+	host->phy_gear = host_params->hs_tx_gear;
+
+	/*
+	 * Power up the PHY using the minimum supported gear (UFS_HS_G2).
+	 * Switching to max gear will be performed during reinit if supported.
+	 */
+	if (host->hw_ver.major < 0x5)
+		host->phy_gear = UFS_HS_G2;
 }
 
 static void ufs_qcom_set_caps(struct ufs_hba *hba)
@@ -1313,12 +1321,6 @@ static int ufs_qcom_init(struct ufs_hba *hba)
 		dev_warn(dev, "%s: failed to configure the testbus %d\n",
 				__func__, err);
 
-	/*
-	 * Power up the PHY using the minimum supported gear (UFS_HS_G2).
-	 * Switching to max gear will be performed during reinit if supported.
-	 */
-	host->phy_gear = UFS_HS_G2;
-
 	return 0;
 
 out_variant_clear:
-- 
2.7.4