On 8/18/20 8:01 PM, Jason Wessel wrote: >>From the Raspberry Pi3 - With the patch removed: > > U-Boot> setenv usb_pgood_delay 2000 > U-Boot> usb reset > resetting USB... > Bus usb@7e980000: USB DWC2 > scanning bus usb@7e980000 for devices... unable to get device descriptor > (error=-22) > 6 USB Device(s) found > scanning usb for storage devices... 1 Storage Device(s) found > > > The only way I found to make it work reliably was to have it retry in the > usb_prepare_device(). > > Jason. > > > On 8/18/20 10:08 AM, Marek Vasut wrote: >> On 8/18/20 4:34 PM, Jason Wessel wrote: >>> I have found through testing some USB 2 composite mouse/keyboard >>> devices do not response to the usb_set_address call immediately >>> following the port reset. It can take anywhere from 2ms to 20ms. >> >> Does it work if you do >> >> => setenv usb_pgood_delay 2000 >> >> before your test ?
Please stop top-posting. Can you check whether the pgood_delay isn't EHCI-only ? It does sure look similar to the problems which pgood_delay was supposed to help with.
