Hi Doug, > Doug Anderson <[email protected]> hat am 7. März 2016 um 22:30 > geschrieben: > > > Stefan, > > On Mon, Mar 7, 2016 at 10:40 AM, Stefan Wahren <[email protected]> wrote: > > Hi Doug, > > > >> Douglas Anderson <[email protected]> hat am 4. März 2016 um 19:23 > >> geschrieben: > >> > >> > >> This reverts commit 192cb07f7928 ("usb: dwc2: Fix probe problem on > >> bcm2835") now that we've found the root cause. See the change > >> titled ("usb: dwc2: Add a 10 ms delay to dwc2_core_reset()"). > > > > adding a delay of 10 ms after a core reset might be a idea, but applying > > both > > patches breaks USB support on RPi :-( > > > > I'm getting the wrong register values ... > > Ugh. :( > > Just out of curiosity, if you loop and time long it takes for the > registers to get to the right state after reset, what do you get? > AKA, pick: > > https://chromium-review.googlesource.com/331260 > > ...and let me know what it prints out. On my system I see: > > [ 1.990743] dwc2 ff540000.usb: Waited 300001 us, 0x04000400 => > 0x04000400, 0x02000800 => 0x02000800 > [ 2.119677] dwc2 ff580000.usb: Waited 9997 us, 0x00100400 => > 0x04000400, 0x00000000 => 0x02000800
sure, but this will take some time (weekend). > > I believe the difference in behavior is because of the two different > types of USB controllers (one is OTG and the other is host only). > > > -Doug
