Messages in this thread | | | Date | Thu, 2 Jun 2022 12:35:42 -0700 | From | Matthias Kaehlcke <> | Subject | Re: [PATCH v20 2/5] usb: dwc3: core: Host wake up support from system suspend |
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Hi Krishna,
with this version I see xHCI errors on my SC7180 based system, like these:
[ 65.352605] xhci-hcd xhci-hcd.13.auto: xHC error in resume, USBSTS 0x401, Reinit
[ 101.307155] xhci-hcd xhci-hcd.13.auto: WARN: xHC CMD_RUN timeout
After resume a downstream hub isn't enumerated again.
So far I didn't see those with v13, but I aso saw the first error with v16.
I can do some more digging next week.
On Thu, Jun 02, 2022 at 01:54:34PM +0530, Krishna Kurapati wrote: > From: Sandeep Maheswaram <quic_c_sanm@quicinc.com> > > Check wakeup-source property for dwc3 core node to set the > wakeup capability. Drop the device_init_wakeup call from > runtime suspend and resume. > > If the dwc3 is wakeup capable, don't power down the USB PHY(s). > The glue drivers are expected to take care of configuring the > additional wakeup settings if needed based on the dwc3 wakeup > capability status. In some SOC designs, powering off the PHY is > resulting in higher leakage, so this patch save power on such boards. > > Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com> > Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com> > Reviewed-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com> > --- > drivers/usb/dwc3/core.c | 9 +++------ > 1 file changed, 3 insertions(+), 6 deletions(-) > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c > index e027c04..b99d3c2 100644 > --- a/drivers/usb/dwc3/core.c > +++ b/drivers/usb/dwc3/core.c > @@ -1787,6 +1787,7 @@ static int dwc3_probe(struct platform_device *pdev) > > platform_set_drvdata(pdev, dwc); > dwc3_cache_hwparams(dwc); > + device_init_wakeup(&pdev->dev, of_property_read_bool(dev->of_node, "wakeup-source")); > > spin_lock_init(&dwc->lock); > mutex_init(&dwc->mutex); > @@ -1948,7 +1949,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg) > dwc3_core_exit(dwc); > break; > case DWC3_GCTL_PRTCAP_HOST: > - if (!PMSG_IS_AUTO(msg)) { > + if (!PMSG_IS_AUTO(msg) && !device_can_wakeup(dwc->dev)) { > dwc3_core_exit(dwc); > break; > } > @@ -2009,7 +2010,7 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg) > spin_unlock_irqrestore(&dwc->lock, flags); > break; > case DWC3_GCTL_PRTCAP_HOST: > - if (!PMSG_IS_AUTO(msg)) { > + if (!PMSG_IS_AUTO(msg) && !device_can_wakeup(dwc->dev)) { > ret = dwc3_core_init_for_resume(dwc); > if (ret) > return ret; > @@ -2086,8 +2087,6 @@ static int dwc3_runtime_suspend(struct device *dev) > if (ret) > return ret; > > - device_init_wakeup(dev, true); > - > return 0; > } > > @@ -2096,8 +2095,6 @@ static int dwc3_runtime_resume(struct device *dev) > struct dwc3 *dwc = dev_get_drvdata(dev); > int ret; > > - device_init_wakeup(dev, false); > - > ret = dwc3_resume_common(dwc, PMSG_AUTO_RESUME); > if (ret) > return ret; > -- > 2.7.4 >
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