On Mon, Oct 20, 2014 at 04:41:54PM +0800, Huang Rui wrote: > On Fri, Oct 17, 2014 at 01:48:19PM -0500, Felipe Balbi wrote: > > Hi, > > > > On Fri, Oct 17, 2014 at 06:41:04PM +0000, Paul Zimmerman wrote: > > > > From: Felipe Balbi [mailto:balbi@xxxxxx] > > > > Sent: Friday, October 17, 2014 8:00 AM > > > > > > > > On Fri, Oct 17, 2014 at 04:53:41PM +0800, Huang Rui wrote: > > > > > AMD NL needs to suspend usb3 ss phy, but this doesn't enable on simulation > > > > > board. > > > > > > > > > > Signed-off-by: Huang Rui <ray.huang@xxxxxxx> > > > > > --- > > > > > drivers/usb/dwc3/core.c | 7 ++++++- > > > > > drivers/usb/dwc3/dwc3-pci.c | 3 ++- > > > > > drivers/usb/dwc3/platform_data.h | 1 + > > > > > 3 files changed, 9 insertions(+), 2 deletions(-) > > > > > > > > > > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c > > > > > index 3ccfe41..4a98696 100644 > > > > > --- a/drivers/usb/dwc3/core.c > > > > > +++ b/drivers/usb/dwc3/core.c > > > > > @@ -395,6 +395,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc) > > > > > if (dwc->quirks & DWC3_QUIRK_TX_DEEPH) > > > > > reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(1); > > > > > > > > > > + if (dwc->quirks & DWC3_QUIRK_SUSPHY) > > > > > > > > should be: > > > > > > > > if (!dwc->suspend_usb3_phy_quirk) > > > > > > > > > + reg |= DWC3_GUSB3PIPECTL_SUSPHY; > > > > > > > > IIRC, databook asks us to set that bit anyway, so the quirk is disabling > > > > that bit. Am I missing something ? Paul ? > > > > > > It looks to me that Huang's patch is enabling that bit, not disabling > > > it. > > > > right, but that's what's actually quirky right ? IIRC, Databook asks us > > to set usb2 and usb3 suspend phy bits and we're just not doing it. > > > > > Currently the driver does not set either DWC3_GUSB3PIPECTL_SUSPHY or > > > DWC3_GUSB2PHYCFG_SUSPHY (unless it has been added by that big patch > > > series you just posted). According to the databook, both of those > > > bits should be set to 1 after the core initialization has completed. > > > > there you go. So unless that quirk bit flag is set, we're safe of > > setting SUSPHY bit for everybody. > > > I read the databook again, below words (DWC3_GUSB3PIPECTL_SUSPHY) is copied from databook: For DRD/OTG configurations, it is recommended that this bit is set to‘ 0’ during coreConsultant configuration. If it is set to ’1’, then the application should clear this bit after power-on reset. Application needs to set it to ’1’ after the core initialization is completed. For all other configurations, this bit can be set to ’1’ during core configuration. I see it's recommended to set '0' if on DRD/OTG configuration. Thanks, Rui -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
