> > From: Felipe Balbi [mailto:balbi@xxxxxx] > > Sent: Tuesday, August 13, 2013 1:30 PM > > > > On Tue, Aug 13, 2013 at 08:04:26PM +0000, Paul Zimmerman wrote: > > > > From: Felipe Balbi > > > > Sent: Tuesday, August 13, 2013 12:20 PM > > > > > > > > On Mon, Aug 05, 2013 at 03:41:57PM +0000, Wang, Yu Y wrote: > > > > > Hi Balbi, > > > > > > > > > > Please check the attached logs. The kernel base one kernel3.10. > > > > > > > > you didn't take the regdump after xHCI :-( I need to check if > > > > erst_base is being mirrored to DEPCMDPAR* > > > > > > Hi Felipe, > > > > > > There seems to be some basic misunderstanding here. ALL versions of > > > the Synopsys core share the internal RAM between device and host > > > modes. So the only supported way of switching modes is to shut down > > > the driver for the mode you are leaving, then start up the driver > > > for the mode you are entering and re-initialize (most of) the registers. > > > > > > This is described in the databook in the OTG -> Software Flow and > > > OTG -> Programming Model chapters. > > > > sure. > > > > > So whether a particular set of RAM-based registers is mirrored > > > between modes does not matter. > > > > fair enough. > > > > > And I don't see what this has to do with hibernation? > > > > I have lost track of the conversation, probably. but I believe Yu > > mentioned resetting the IP everytime when coming out of hibernation > > and, for whatever reason, I confused myself with the other problem. > > OK :) > > By the way, I wanted to tell Yu that you (Felipe) are correct about not resetting > the core when coming out of hibernation. That is definitely not required, and > would probably break the resume from hibernation. I think we (Synopsys) > should update the databook to mention that explicitly, since it is different from > the normal initialization flow. > > -- > Paul [Yu:] One question. If follow baili's design. When nothing connected, both host and device Should under hibernation mode, right? That is mean U2PMU/U3PMU should be save *two* copies of backup data respective for host and device mode, right? I don't think the U2PMU/U3PMU have this capability. With balbi's design. If no role switch, and no disconnect case. It should be working for hibernation. But with role switch, we have to re-initialization. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body > of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at > http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
