Hi, Bin Liu <b-liu@xxxxxx> writes: >> > >> > Does this mean the issue of isoc high bandwidth transfer was fixed by >> > >> > this patchset per your test? >> > >> >> > >> No, I couldn't get g_webcam to work yet. >> > > >> > > In mainline, g_webcam is broken with DWC3. Also these two patches don't >> > > fix the issue on v4.4.21. >> > >> > care to send tracepoint output? Best if you could cherry pick my latest >> > tracepoint changes so we have the best output possible. >> > >> > I have also built a branch with v4.4.21 + all dwc3 patches (except for >> > device properties and PCI stuff) which you could use for testing. If you >> > run with that, then I can get proper trace output and I can try to >> > figure out what's missing. >> > >> > Branch is here: >> > >> > git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git usb/v4.4.21+dwc3 >> >> This branch does not generate the isoch traffic (on ep2in). ftrace >> attached (dwc3-g_webcam-v4.4.21+tp.ftrace). >> >> I also attached the ftrace log for v4.4.21 tag >> (dwc3-g_webcam-v4.4.21.ftrace) for comparison, which has ep2in isoch >> traffic, but only one transaction per SOF. > > Sorry, I didn't realize the ftrace file size is huge. Attached the > tarball here. looking at webcam.c, it'll set wMaxPacket correctly (to 0x1400) if you pass streaming_maxpacket=3072. So that's one thing. I'll look at this log with more detail tomorrow, though. -- balbi -- 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
