linux-kernel - [PATCH V1] scsi: ufs: ufs-qcom: Update UFS devfreq Parameters

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Message-Id: <20230711104006.15872-1-quic_nitirawa@quicinc.com>
Date:   Tue, 11 Jul 2023 16:10:06 +0530
From:   Nitin Rawat <quic_nitirawa@...cinc.com>
To:     mani@...nel.org, quic_cang@...cinc.com, stanley.chu@...iatek.com,
        bvanassche@....org, quic_asutoshd@...cinc.com, avri.altman@....com,
        martin.petersen@...cle.com, beanhuo@...ron.com
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        jejb@...ux.ibm.com, linux-arm-msm@...r.kernel.org,
        quic_ziqichen@...cinc.com, Nitin Rawat <quic_nitirawa@...cinc.com>
Subject: [PATCH V1] scsi: ufs: ufs-qcom: Update UFS devfreq Parameters

To support the periodic polling mode without stop
caused by CPU idle state, enable delayed timer
as default instead of deferrable timer for
qualcomm platforms.
And change UFS devfreq downdifferential threshold to 65
for less aggresive downscaling.

Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
Signed-off-by: Asutosh Das <quic_asutoshd@...cinc.com>
---
 drivers/ufs/host/ufs-qcom.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 82d02e7f3b4f..a15815c951ca 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1388,8 +1388,9 @@ static void ufs_qcom_config_scaling_param(struct ufs_hba *hba,
 					struct devfreq_simple_ondemand_data *d)
 {
 	p->polling_ms = 60;
+	p->timer = DEVFREQ_TIMER_DELAYED;
 	d->upthreshold = 70;
-	d->downdifferential = 5;
+	d->downdifferential = 65;
 }
 #else
 static void ufs_qcom_config_scaling_param(struct ufs_hba *hba,
--
2.17.1