On Tue, Oct 4, 2022 at 7:12 PM Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx> wrote: > > On Tue, Oct 04, 2022, Ferry Toth wrote: > > Hi > > > > Op 04-10-2022 om 10:28 schreef Andy Shevchenko: > > > On Mon, Oct 03, 2022 at 09:57:35PM +0000, Thinh Nguyen wrote: > > > > On Tue, Sep 27, 2022, Andy Shevchenko wrote: > > > > > This reverts commit 0f01017191384e3962fa31520a9fd9846c3d352f. > > > > > > > > > > As pointed out by Ferry this breaks Dual Role support on > > > > > Intel Merrifield platforms. > > > > Can you provide more info than this (any debug info/description)? It > > > > will be difficult to come back to fix with just this to go on. The > > > > reverted patch was needed to fix a different issue. > > > > On Merrifield we have a switch with extcon driver to switch between host and > > device mode. Now with commit 0f01017, device mode works. In host mode the > > root hub appears, but no devices appear. In the logs there are no messages > > from tusb1210, but there should be because lately there normally are > > (harmless) error messages. Nothing in the logs point in the direction of > > tusb1210 not being probed. > > > > The discussion is here: https://urldefense.com/v3/__https://lkml.org/lkml/2022/9/24/237__;!!A4F2R9G_pg!avfDjiGwi8xu0grHYrQQTZEEUnmaKu82xxdty0ZltxyU8BkoFD6AMq4a-7STYiKxNQpdYXgP1QG_IZbroEM$ > > > > I tried moving some code as suggested without result: https://urldefense.com/v3/__https://lkml.org/lkml/2022/9/24/434__;!!A4F2R9G_pg!avfDjiGwi8xu0grHYrQQTZEEUnmaKu82xxdty0ZltxyU8BkoFD6AMq4a-7STYiKxNQpdYXgP1QG_boaK8Qw$ > > > > And with success: https://urldefense.com/v3/__https://lkml.org/lkml/2022/9/25/285__;!!A4F2R9G_pg!avfDjiGwi8xu0grHYrQQTZEEUnmaKu82xxdty0ZltxyU8BkoFD6AMq4a-7STYiKxNQpdYXgP1QG_MbbbZII$ > > > > So, as Andrey Smirnov writes "I think we'd want to figure out why the > > ordering is important if we want to justify the above fix." > > > > > It's already applied, but Ferry probably can provide more info if you describe > > > step-by-step instructions. (I'm still unable to test this particular type of > > > features since remove access is always in host mode.) > > > > > I'd be happy to test. > > Thanks! > > Does the failure only happen the first time host is initialized? Or can > it recover after switching to device then back to host mode? > > Probably the failure happens if some step(s) in dwc3_core_init() hasn't > completed. > > tusb1210 is a phy driver right? The issue is probably because we didn't > initialize the phy yet. So, I suspect placing dwc3_get_extcon() after > initializing the phy will probably solve the dependency problem. > > You can try something for yourself or I can provide something to test > later if you don't mind (maybe next week if it's ok). FWIW, I just got the same HW Ferry has last week and am planning to work on this over the weekend.
