On Mon, Jan 24, 2022 at 11:01:07AM +0530, Sandeep Maheswaram wrote: > Hi Greg, > > On 1/7/2022 10:27 AM, Sandeep Maheswaram wrote: > > > > On 1/6/2022 7:55 PM, Greg Kroah-Hartman wrote: > > > On Wed, Dec 22, 2021 at 11:39:43AM +0530, Sandeep Maheswaram wrote: > > > > Set XHCI_SKIP_PHY_INIT quirk to avoid phy initialization twice. > > > > Runtime suspend of phy drivers was failing from DWC3 driver as runtime > > > > usage value is 2 because the phy is initialized from DWC3 and HCD core. > > > > DWC3 manages phy in their core drivers. Set this quirk to avoid phy > > > > initialization in HCD core. > > > > > > > > Signed-off-by: Sandeep Maheswaram <quic_c_sanm@xxxxxxxxxxx> > > > > --- > > > > v5: > > > > Added comment to explain the change done. > > > > v4: > > > > Changed pdev->dev.parent->of_node to sysdev->of_node > > > > > > > > drivers/usb/host/xhci-plat.c | 8 ++++++++ > > > > 1 file changed, 8 insertions(+) > > > > > > > > diff --git a/drivers/usb/host/xhci-plat.c > > > > b/drivers/usb/host/xhci-plat.c > > > > index c1edcc9..e6014d4 100644 > > > > --- a/drivers/usb/host/xhci-plat.c > > > > +++ b/drivers/usb/host/xhci-plat.c > > > > @@ -327,6 +327,14 @@ static int xhci_plat_probe(struct > > > > platform_device *pdev) > > > > &xhci->imod_interval); > > > > } > > > > + /* > > > > + * Set XHCI_SKIP_PHY_INIT quirk to avoid phy initialization twice. > > > > + * DWC3 manages phy in their core drivers. Set this quirk > > > > to avoid phy > > > > + * initialization in HCD core. > > > > + */ > > > > + if (of_device_is_compatible(sysdev->of_node, "snps,dwc3")) > > > > + xhci->quirks |= XHCI_SKIP_PHY_INIT; > > > > + > > > Why is this function caring about dwc3 stuff? Shoudn't this be a > > > "generic" device property instead of this device-specific one? > > > > > > thanks, > > > > > > greg k-h > > > > This quirk is set only if required for some controllers (eg: dwc3 & > > cdns3). > > > > Please check below commit. > > > > https://lore.kernel.org/all/20200918131752.16488-5-mathias.nyman@xxxxxxxxxxxxxxx/ > > > > > > > > Regards > > > > Sandeep > > > > > Please let me know if anything more info needed for this patch. The merge window ended a few hours ago, give me a few days to catch up with my pending email queue that I have to review: $ mdfrm -c ~/mail/todo/ 2254 messages in /home/gregkh/mail/todo/ thanks, greg k-h
