On 1.7.2016 13:19, Michal Suchanek wrote: > On 1 July 2016 at 13:02, Michal Suchanek <hramr...@gmail.com> wrote: >> On 30 June 2016 at 22:30, Ondřej Jirman <m...@xff.cz> wrote: >>> On 30.6.2016 20:21, Michal Suchanek wrote: >>>> On 30 June 2016 at 20:06, Michal Suchanek <hramr...@gmail.com> wrote: >>>>> Hello, >>>>> >>>>> On 30 June 2016 at 16:44, Ondřej Jirman <m...@xff.cz> wrote: >>>>>> Hi, >>>>>> >>>>>> hopefuly, it was the NPE that I fixed. It was specifically in the H3 usb >>>>>> phy code path for phy0. So I believe it was untested, >>>>>> because I didn't find any dts file that would use phy0. >>>>>> >>>>> >>>>> This WorksForMe(TM). >>>> >>>> There is still small problem left. When I boot with the USB cable >>>> connected I have to disconnect and reconnect the cable to get the >>>> gadget working. >>>> >>> >>> Good to know, I'll test this case. It will probably be something around >>> the iddet handling during phy0 initialization, which leads to the >>> connected cable being treated as OTG, which would turn the usb port into >>> host mode. You can verify that by looking into sysfs where there's an >>> attribute that tells the current mode (peripheral / host). I don't >>> rember where exactly it could be found. >>> >> >> This is interesting. The USB gadget works (from the start without >> reconnecting) >> with one PC + hub and fails with other PC + hub. Both pretty much 100% >> >> Ironically the broken hub provides sound voltage above 5.1V and the working >> one should give about 4.75V given its 0.2V drop from the board power level. > > For the record > > /sys/devices/platform/soc/1c19000.usb/musb-hdrc.1.auto/mode is > b_idle when gadget is broken > b_peripherial when gadget is working
Hi, you may try adding printks to sun4i_usb_phy0_id_vbus_det_scan in phy-sun4i-usb.c inside the if (id_notify) and if (vbus_notify), and try if you can observe any differences between the two hubs in dmesg output. Or first, I'd suggest to add unconditional "return true" to sun4i_usb_phy0_poll, if that fixes anything. This will enable polling on the iddet gpio. (Perhaps gpio interrupts are not very reliable?) regards, Ondrej > Thanks > > Michal > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
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