On 06/16/2017 09:19 AM, Marek Vasut wrote: > On 06/16/2017 03:31 PM, Bin Meng wrote: >> It was observed that on Intel MinnowMax board, when xHCI is enabled >> in the BayTrail SoC, with a USB 3.0 device connected to the bottom >> USB 3.0 port (mapped to xHCI root port #7), its PORTSC register is >> always 0x201203 (CCS = 1, CSC = 0). The root cause of such behavior >> is unknown yet. Connect status change bit is set on the same port >> with a USB 2.0 device (mapped to xHCI port #1, which is a different >> port on the root hub). >> >> With current logic in usb_scan_port(), the enumeration process will >> abort if it does not detect a connect status change on a hub port. >> However since a device connection status is correctly reported, the >> enumeration process can still continue. >> >> With this change, USB device connected to the bottom blue port on >> MinnowMax board can be enumerated under either SS or HS mode. >> >> Signed-off-by: Bin Meng <bmeng...@gmail.com> > > I'd be slightly concerned this can break some other controllers, like > the DWC2 . CCing Dinh, maybe he can test it on SoCFPGA. >
I tested this patch on a SoCFPGA Atlas/DE0-Nano board, and USB is still working fine. Feel free to add: Tested-by: Dinh Nguyen <dingu...@kernel.org> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot