Hi, tnimkar@xxxxxxxxxxxxxx writes: > On 2018-04-05 11:24, Felipe Balbi wrote: >> Hi, >> >> Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> writes: >>> On Wed, Apr 04, 2018 at 05:14:50PM +0530, tnimkar@xxxxxxxxxxxxxx >>> wrote: >>>> Hi Oliver/Greg, >>>> >>>> I am able to duplicated the UAS issue on 4.16 as well. >>>> The behavior is same new usb device detects and reset after aprox 30 >>>> sec(SD_TIMEOUT) >>>> Logs are already shared below. >>>> >>>> We are using Synopsys dwc3 as host controller, May I know have tested >>>> it >>>> with dwc3? >>>> I have tried it on Linux PC (x86 Ubuntu machine) I could not see the >>>> issue. >>>> It enumerates well. >>> >>> Great, stick with an x86 platform! :) >>> >>> Looks like a dwc3 host controller issue, try enabling tracing and >>> debugging in that driver when this happens to see what is going on. >>> Also look at all of the recent dwc3 patches that were just sent to >>> Linus >>> for 4.17-rc1 to verify if that solves the issue. >> >> dwc3's host side is xhci compliant :-) Some revisions have some quirks >> which may not all be supported. > > Felipe, "not all be supported" do u mean some xhci compliant host do > not support uas? and they have such quirks already defined? No. I mean that some of dwc3's host side quirks may not have workarounds implemented >> Tushar, which dwc3 revision are you using? Have you gotten in touch >> with > it is DWC3_REVISION_300A ..3.0a that's rather recent... >> your HW designers to ask for Errata List? A run with xhci tracepoints > will response you, let me cross check once again with errata list. okay -- balbi
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