linux-kernel - [PATCH V2] scsi: ufs: ufs-qcom: Update UFS devfreq Parameters

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Date:   Sun, 16 Jul 2023 13:19:07 +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,
        konrad.dybcio@...aro.org
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        agross@...nel.org, andersson@...nel.org, jejb@...ux.ibm.com,
        linux-arm-msm@...r.kernel.org, quic_ziqichen@...cinc.com,
        Nitin Rawat <quic_nitirawa@...cinc.com>
Subject: [PATCH V2] 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
aggressive downscaling.

Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
Signed-off-by: Asutosh Das <quic_asutoshd@...cinc.com>
---

Changes in v2:
- Realigned the commit text

 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