| Message ID | 9b67c25eb7c0bf80075b36660aebdb3788207353.1589997078.git.asutoshd@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v4,1/2] scsi: ufs: export hibern8 entry | expand |
Hi, > > > 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> I guess that your previous versions are pretty far back - , I noticed a comment by Pedro, so you might want to resend this series. What happens if the pre-change is successful, but you are not getting to the post change because, e.g. ufshcd_set_clk_freq failed? Also, this piece of code is ~5 years old, so you might want to elaborate on how come hibernation is now needed. Thanks, Avri
Hi Avri, On 5/20/2020 2:33 PM, Avri Altman wrote: > Hi, > >> >> >> 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> > > I guess that your previous versions are pretty far back - , > I noticed a comment by Pedro, so you might want to resend this series. > Ok. > What happens if the pre-change is successful, > but you are not getting to the post change because, e.g. ufshcd_set_clk_freq failed? > I agree. Let me check this. > Also, this piece of code is ~5 years old, so you might want to elaborate on how come hibernation is now needed. > > Thanks, > Avri > Thanks for the review. Hibernation was needed since long actually. I guess it was never pushed upstream. Thanks, -asd
On 5/25/2021 12:57 AM, Lee Jones wrote: > On Wed, 20 May 2020 at 22:59, Asutosh Das (asd) <asutoshd@codeaurora.org > <mailto:asutoshd@codeaurora.org>> wrote: > > Hi Avri, > > On 5/20/2020 2:33 PM, Avri Altman wrote: > > Hi, > > > >> > >> > >> 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 > <mailto:asutoshd@codeaurora.org>> > > > > I guess that your previous versions are pretty far back - , > > I noticed a comment by Pedro, so you might want to resend this > series. > > > Ok. > > > What happens if the pre-change is successful, > > but you are not getting to the post change because, e.g. > ufshcd_set_clk_freq failed? > > > I agree. Let me check this. > > > Also, this piece of code is ~5 years old, so you might want to > elaborate on how come hibernation is now needed. > > > > Thanks, > > Avri > > > > Thanks for the review. Hibernation was needed since long actually. > I guess it was never pushed upstream. > > > Good morning Asd, > > Any luck with getting this upstream? > > Looks like this was the last submission. > > Did something change? Is this no longer required? > Hi Lee This slipped away. I may not get to this soon. I'd prefer to drop it for now and come back to it when I've some time. Thanks, -asd > -- > Lee Jones [李琼斯] > Linaro Services Senior Technical Lead > Linaro.org │ Open source software for ARM SoCs > Follow Linaro: Facebook | Twitter | Blog
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 00ce8d6..3a4ed64 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1418,18 +1418,27 @@ 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, @@ -1437,6 +1446,7 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, dev_req_params->hs_rate, false); ufs_qcom_update_bus_bw_vote(host); + err = ufshcd_uic_hibern8_exit(hba); } out:
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> --- drivers/scsi/ufs/ufs-qcom.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)