linux-kernel - [PATCH v2 2/7] scsi: ufs: ufs-qcom: Setup host power mode during init

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Date:   Mon,  6 Nov 2023 20:46:08 -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,
        "Bao D . Nguyen" <quic_nguyenb@...cinc.com>,
        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:ARM/QUALCOMM SUPPORT),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 2/7] scsi: ufs: ufs-qcom: Setup host power mode during init

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

Setup host power mode and its limitations during UFS host driver init to
avoid repetitive work during every power mode change.

Co-developed-by: Bao D. Nguyen <quic_nguyenb@...cinc.com>
Signed-off-by: Bao D. Nguyen <quic_nguyenb@...cinc.com>
Signed-off-by: Can Guo <quic_cang@...cinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 22 ++++++++++++++--------
 drivers/ufs/host/ufs-qcom.h |  1 +
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index aee66a3..cc0eb37 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -898,7 +898,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
 				struct ufs_pa_layer_attr *dev_req_params)
 {
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
-	struct ufs_host_params host_params;
+	struct ufs_host_params *host_params = &host->host_params;
 	int ret = 0;
 
 	if (!dev_req_params) {
@@ -908,13 +908,7 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba,
 
 	switch (status) {
 	case PRE_CHANGE:
-		ufshcd_init_host_param(&host_params);
-		host_params.hs_rate = UFS_QCOM_LIMIT_HS_RATE;
-
-		/* 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);
-
-		ret = ufshcd_negotiate_pwr_param(&host_params, dev_max_params, dev_req_params);
+		ret = ufshcd_negotiate_pwr_param(host_params, dev_max_params, dev_req_params);
 		if (ret) {
 			dev_err(hba->dev, "%s: failed to determine capabilities\n",
 					__func__);
@@ -1049,6 +1043,17 @@ static void ufs_qcom_advertise_quirks(struct ufs_hba *hba)
 		hba->quirks |= UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH;
 }
 
+static void ufs_qcom_set_host_params(struct ufs_hba *hba)
+{
+	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
+	struct ufs_host_params *host_params = &host->host_params;
+
+	ufshcd_init_host_param(host_params);
+
+	/* 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);
+}
+
 static void ufs_qcom_set_caps(struct ufs_hba *hba)
 {
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
@@ -1273,6 +1278,7 @@ static int ufs_qcom_init(struct ufs_hba *hba)
 
 	ufs_qcom_set_caps(hba);
 	ufs_qcom_advertise_quirks(hba);
+	ufs_qcom_set_host_params(hba);
 
 	err = ufs_qcom_ice_init(host);
 	if (err)
diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h
index 9950a00..ab94c54 100644
--- a/drivers/ufs/host/ufs-qcom.h
+++ b/drivers/ufs/host/ufs-qcom.h
@@ -240,6 +240,7 @@ struct ufs_qcom_host {
 
 	struct gpio_desc *device_reset;
 
+	struct ufs_host_params host_params;
 	u32 phy_gear;
 
 	bool esi_enabled;
-- 
2.7.4