| Message ID | 212b7aaf6d834c4a8c682fdac4a59b84013ed573.1632818942.git.nguyenb@codeaurora.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | Put Qualcomm's ufs controller to hibern8 during clock scaling | expand |
Hello, >-----Original Message----- >From: nguyenb=codeaurora.org@mg.codeaurora.org >[mailto:nguyenb=codeaurora.org@mg.codeaurora.org] On Behalf Of Bao D. >Nguyen >Sent: Tuesday, September 28, 2021 2:36 PM >To: cang@codeaurora.org; asutoshd@codeaurora.org; >martin.petersen@oracle.com; linux-scsi@vger.kernel.org >Cc: linux-arm-msm@vger.kernel.org; Bao D . Nguyen ><nguyenb@codeaurora.org>; Andy Gross <agross@kernel.org>; Bjorn Andersson ><bjorn.andersson@linaro.org>; Alim Akhtar <alim.akhtar@samsung.com>; Avri >Altman <avri.altman@wdc.com>; James E.J. Bottomley <jejb@linux.ibm.com>; >open list <linux-kernel@vger.kernel.org> >Subject: [PATCH v2 2/2] scsi: ufs-qcom: enter and exit hibern8 during clock scaling > >From: Asutosh Das <asutoshd@codeaurora.org> > >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. > >Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> >Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org> >--- Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> > drivers/scsi/ufs/ufs-qcom.c | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) > >diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index >92d4c61..92f5bb4 100644 >--- a/drivers/scsi/ufs/ufs-qcom.c >+++ b/drivers/scsi/ufs/ufs-qcom.c >@@ -1212,24 +1212,34 @@ 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: >-- >The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a >Linux Foundation Collaborative Project
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 92d4c61..92f5bb4 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1212,24 +1212,34 @@ 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: