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UPSTREAM: scsi: ufs: ufs-qcom: Enter and exit hibern8 during clock scaling

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Qualcomm controller needs to be in hibern8 before scaling clocks.  This
change puts the controller in hibern8 state before scaling and brings it
out after scaling of clocks.

Link: https://lore.kernel.org/r/212b7aaf6d834c4a8c682fdac4a59b84013ed573.1632818942.git.nguyenb@codeaurora.org
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Bug: 234653003
(cherry picked from commit a0cea83332)
Change-Id: I2d955e12f487bbf88bccf1d9be3c57df8ef82e48
Signed-off-by: Bart Van Assche <bvanassche@google.com>
This commit is contained in:
Asutosh Das
2021-09-28 02:06:13 -07:00
committed by Bart Van Assche
parent a30a079b7a
commit a23b44eb9a
1 changed files with 11 additions and 1 deletions
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12
drivers/scsi/ufs/ufs-qcom.c
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@@ -1216,24 +1216,34 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
int err = 0;
if (status == PRE_CHANGE) {
err = ufshcd_uic_hibern8_enter(hba);
if (err)
return err;
if (scale_up)
err = ufs_qcom_clk_scale_up_pre_change(hba);
else
err = ufs_qcom_clk_scale_down_pre_change(hba);
if (err)
ufshcd_uic_hibern8_exit(hba);
} else {
if (scale_up)
err = ufs_qcom_clk_scale_up_post_change(hba);
else
err = ufs_qcom_clk_scale_down_post_change(hba);
if (err || !dev_req_params)
if (err || !dev_req_params) {
ufshcd_uic_hibern8_exit(hba);
goto out;
}
ufs_qcom_cfg_timers(hba,
dev_req_params->gear_rx,
dev_req_params->pwr_rx,
dev_req_params->hs_rate,
false);
ufshcd_uic_hibern8_exit(hba);
}
out: