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FROMLIST: scsi: 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.

Bug: 143136976
Link: https://lore.kernel.org/lkml/1571849351-819-2-git-send-email-asutoshd@codeaurora.org/
Change-Id: I0a0903ff1dcc6edef1ac5ab32c3e943828b42a7e
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
This commit is contained in:
Asutosh Das
2019-10-22 18:20:21 -07:00
committed by Todd Kjos
parent 38c1605e75
commit 8e57dcda43
1 changed files with 11 additions and 1 deletions
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12
drivers/scsi/ufs/ufs-qcom.c
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@@ -1305,18 +1305,27 @@ 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,
@@ -1324,6 +1333,7 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba,
dev_req_params->hs_rate,
false);
ufs_qcom_update_bus_bw_vote(host);
ufshcd_uic_hibern8_exit(hba);
}
out: