On 3/22/19 2:10 PM, Bin Liu wrote: > > Please explain the issue in details here, we will try to solve it. I did some more troubleshooting, contrary to what I stated initially the kernel version does not matter. What changed the behaviour is that I was loading g_mass_storage on the system working and not loading it on the system not working. Without loading g_mass_storage the port was staying in "b_idle" mode regardless of what cable was connected, VBUS was always 0 V, USB_ID was always in high impedance. When loading g_mass_storage the port was instead cycling between a_wait_vrise and a_idle with a A cable (not connected to anything) and properly going to a_host when connected to a device. How is g_mass_storage linked to the OTG port properly working in host mode? I'm asking just out of curiosity, since I will be loading it anyway. Thank you, Regards, -- Daniele Orlandi
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