Hi, On 4/16/2018 3:47 PM, Tushar Nimkar wrote: > On 2018-04-05 12:39, Felipe Balbi wrote: >> 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... We have seen some data stall issues on 3.00a core in SS mode. Workaround was to set EnableEpCacheEvict bit (12) in GUCTL2 register. You can try that as well. >> >>>> 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 > there is no uas related stuff in errata list, Felipe. > > -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
