Hello Xu, On Tue, 18 Jul 2023 08:31:48 +0000 Xu Yang <xu.yang_2@xxxxxxx> wrote: > > -----Original Message----- > > > > Ciao Francesco, > > > > On Thu, 6 Jul 2023 12:23:43 +0200 > > Francesco Dolcini <francesco@xxxxxxxxxx> wrote: > > > > > Hello Luca, > > > > > > On Tue, May 30, 2023 at 11:22:51AM +0000, Jun Li wrote: > > > > Yes, your understanding is correct, talked with Xu(in CC), he will take this > > > > soon. > > > > > > A series was posted > > > > > > I had no time to try or look at it yet. > > > > Thanks for keeping me up to date on this topic, which is still totally > > relevant to me. > > > > I looked at the series, but it does not seem to be addressing the > > problem with USB host not detecting new devices when VBUS is not > > directly connected, e.g. in the Colibri imx6ull SoM. > > > > Xu, do you confirm the series at the link is _not_ solving the problem > > being discussed here? > > Have you tried this patchset? The upstream driver couldn't get correct > USB role from HW_USBPHY_CTRL register when the ID pin is float. This is > what this patchset is trying to fix. With this patch, condition > "(!vbus_is_on && !mxs_phy_is_otg_host(mxs_phy)" will always be false when > controller acts as host role, then __mxs_phy_disconnect_line(phy, true) > will never be called. So I think it doesn't matter whether VBUS is connected > or not when act as host mode. If you still have issue after apply this patchset, > please let me know. I tested this patchset on top of v6.5-rc2 and I confirm USB detection is still broken on the Colibri iMX6ULL. With or without the patches the behavior is the same: USB devices are detected only during boot, and anything connected after boot are never detected. For the archives, I'm replying also to the patch series. Luca -- Luca Ceresoli, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
