Adding Jonathan. > From: Paul Zimmerman > Sent: Wednesday, November 27, 2013 11:34 AM > > > From: gordon.hollingworth@xxxxxxxxx [mailto:gordon.hollingworth@xxxxxxxxx] On Behalf Of Gordon > Hollingworth > > Sent: Tuesday, November 26, 2013 10:48 PM > > To: Stephen Warren > > Cc: Paul Zimmerman; Greg Kroah-Hartman; devel@xxxxxxxxxxxxxxxxxxxx; linux-rpi- > > kernel@xxxxxxxxxxxxxxxxxxx > > Subject: Re: [PATCH] staging: dwc2: set up all module params > > > > This looks like it is the same problem we saw in the dwc_otg driver > > with incorrect scheduling of split USB transactions to downstream > > ports behind single TT hubs (this just makes the problem worse rather > > than be the cause of anything) > > > > In general it should be possible to schedule multiple split > > transactions to a TT but they _must_ be completed on time or the hub > > will drop the transactions on the floor... Unfortunately because of > > the interrupt latency issues it cannot be guaranteed without the FIQ > > Hi Gordon, > > Any chance one of your guys could look at adding FIQ support to the > mainline kernel for the BCM2835 (Raspberry Pi) platform and the dwc2 > driver? Support for FIQs already exists in the arm tree, and is used on > other platforms. Some time back you volunteered Jonathan Bell to help > work on the dwc2 driver, perhaps he could look into this? I'm probably > not going to have the bandwidth to work on this entirely on my own, but > I could certainly try to help with any questions or issues you might run > into. > > -- > Paul _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
