Hi Roger, > Am 30.11.2018 um 13:40 schrieb Roger Quadros <rogerq@xxxxxx>: > > Nikolaus, > > On 29/11/18 12:00, H. Nikolaus Schaller wrote: >> Hi, >> I finally got some USB3 OTG cable (said to be compatible with Samsung Galaxy Note 3). >> Unfortunately devices do not enumerate (don't show up in lsusb -t) and don't even >> fall back to USB2 speed. >> If I use a pure USB2 OTG cable all devices work in USB2 mode. >> >> This is all the same on OMAP5EVM and Pyra. >> >> Is this known or does USB3-OTG work for someone? > > I can give it a try. Do you have any patches to enable the VBUS regulator on omap5-uevm? I think everything is already upstream and I have not used a special patch for it. See extcon_usb3 and &usb in omap5-board-common.dtsi. This seems to connect the ID pin to the smps10. The dwc3 role patch is also upstream https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v4.20-rc4&id=656c1a65ab555ee5c7cd0d6aee8ab82ca3c1795f so that it should work out of the box for USB2 (or 3) with mainline kernel Unless I did miss something important I am not aware of. > >> Is this repeatable or just a problem of my setup (e.g. bad cables)? > > At least on dra7-evm I had a lot of trouble with many of the 3.0 OTG cables. > The one I have working doesn't ground the ID pin. But I can use the J10 jumper to > manually ground ID on the omap5-uevm. > >> Is there a fix? >> >> BR and thanks, >> Nikolaus >> > > cheers, > -roger BR and thanks for giving it a try, Nikolaus
