On 07/01/21 20:10, Ethin Probst wrote: > The first: I don't know how to retrieve the descriptors on the UEFI > API. I've looked at the Chaos Key DXE, if memory serves, or the > display port one -- one of the two. One of them contained a > ReadDescriptor() function, and so I've borrowed that, but that doesn't > really help much.
Does the stuff in "MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c" help? (I don't know how that's exposed, if at all, through UEFI protocols, alas.) I've added Hao and Ray to the address list (IIUC they maintain the USB modules in edk2). Thanks Laszlo > > On 7/1/21, Michael Brown <mc...@ipxe.org> wrote: >> On 01/07/2021 00:01, Ethin Probst wrote: >>> So Leif and I have been working on USB Audio but we've run into a snag. >>> We've encountered a problem -- neither of us knows enough about USB to >>> figure out how to get the class-specific AC interface descriptors, and >>> those contain vital information that I need to be able to control the >>> audio device. >> >> Do you mean that you can't figure out how to retrieve the descriptors >> via the UEFI APIs, or that you don't know how to interpret the >> descriptors after retrieval? >> >> Thanks, >> >> Michael >> > > -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#77444): https://edk2.groups.io/g/devel/message/77444 Mute This Topic: https://groups.io/mt/83904983/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-