Hi Jisheng, On 6/16/2020 1:03 PM, Jisheng Zhang wrote: > Hi, > > After reading current dwc2 code, I got an impression that resume from suspend > to ram isn't supported for DWC2_POWER_DOWN_PARAM_NONE case, right? In fact 'ram' Do you mean on suspend save registers in RAM? If yes, then in case when power_down is _NONE then no any register saving/restoring to/from RAM should be performing. > we do see usb device can't resume properly with DWC2_POWER_DOWN_PARAM_NONE case. > If you see any issue on resume in mentioned case then more probably is some another issue which can debugged. > If the impression is true, what's the proper technical direction? Add > dwc2_host_enter_suspend() as dwc2_host_enter_hibernation() > and > dwc2_host_exit_suspend() as dwc2_host_exit_hibernation()? > > Thanks in advance, > Jisheng > Thanks, Minas
