Resending since not everyone received my reply -----Original Message----- From: Brokhman Tatyana [mailto:tlinder@xxxxxxxxxxxxxx] Sent: Tuesday, October 12, 2010 11:18 AM To: David Brownell Cc: tlinder@xxxxxxxxxxxxxx; Sarah Sharp; linux-usb@xxxxxxxxxxxxxxx; Greg Kroah-Hartman; Michal Nazarewicz; Randy Dunlap; Laurent Pinchart; Kyungmin Park; Robert Lukassen; Matthew Wilcox; Fabien Chouteau; Tejun Heo; linux-kernel@xxxxxxxxxxxxxxx Subject: Re: [RFC/PATCH 2/2] usb:gadget: Add SuperSpeed support to the Gadget Framework > >> > Ok. I suppose whatever gadget application is being used can reset >> these >> > values later? So that if you had a gadget webcam, it could set the >> > wMaxPacketSize to the frame size or whatever it needed? > > Yes ... in fact, every altsetting or configuration may need to set up > each endpoint differently ... that's why ep_enable() passes full > endpoint configs (as descriptors), so they can more easily be changed. > > If the notion is that there are values that may need to get passed from > silicon to driver, I'd like to see that done explicitly, with drivers > updating descriptors, instead of doing anything by back-door routes > that make UDC drivers making hidden updates. > > - Dave This implementation creates default SuperSpeed descriptors with default values. It is used to spare drivers that don't want to fully exploit SuperSpeed functionality from handling SupperSpeed descriptors and still be able to operate in a SupperSpeed mode. Please note that the gadget driver can still provide SuperSpeed descriptors with correct (and not default values) if it wishes to. I hope I understood your comment correctly. Please let me know if this is not the case. > > -- > 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 > -- Sent by an consultant of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- 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
