On 28/03/2019 12:21, Robin Murphy wrote: > Hi Jack, > > On 28/03/2019 11:34, Jack Mitchell wrote: >> Hi, >> >> Can anyone confirm working operation of USB OTG over a type c phy on an >> RK3399 at commit 8c2ffd9174779014c3fe1f96d9dc3641d9175f00 (tag: >> v5.1-rc2). >> >> I've got a nanopc-t4 here and when I try to load the g_ether driver I >> receive >> >> [ 6.359280] udc-core: couldn't find an available UDC - added >> [g_ether] to list of pending drivers >> >> I've had a look through the dts and all seems to be in order. USB >> devices work fine in the host ports and I've confirmed otg mode. >> >> root@rk3399:/sys/kernel/debug/fe800000.dwc3# cat mode >> otg >> >> The cable is being detected at plug/unplug as can be seen from >> >> [ 1252.479273] phy phy-ff770000.syscon:usb2-phy@e450.2: charger = >> USB_SDP_CHARGER >> >> My defconfig is the standard arm64 as provided with the addition of >> CONFIG_USB_ETH=m. >> >> Any information would be helpful, especially if this is working on other >> 3399 based boards at the mentioned commit. > > I've not tried the type C port since I was playing with the initial > dts, but IIRC not even host mode was working at that point. My vague > understanding is that there was (and probably still is) some > communication missing between the fusb302 driver and the dwc3 driver > (since NanoPC-T4 is using that external chip rather than the RK3399's > internal type C controller). > > It's certainly something I've been meaning to come back and take > another look at, so I'll try to have a play over the weekend to see > how much I can make sense of. > > Robin. Thanks Robin, and I appreciate you adding the initial dts, I've got a patch for mainline uboot which I'll try submit soon which gives us a full mainline stack. I've seen other discussions around the fusb302 with other boards so I'll try poking around and see if I can come up with anything. Thanks for the tip! Cheers, Jack. _______________________________________________ Linux-rockchip mailing list Linux-rockchip@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-rockchip
