[U-Boot] [PATCH 00/20] usb: xhci: Fix USB xHCI support on Intel platform

[Stefan Roese]

Hi Bin,

On 21.06.2017 12:24, Bin Meng wrote:
> On Wed, Jun 21, 2017 at 5:28 PM, Stefan Roese <sr at denx.de> wrote:

<snip>

>> As you can see, the 2 USB mass storage devices which are connected
>> to the xHCI HSIC port are only detected after a power-up and not
>> after a system reset.
>>
>> Is this something that you can reproduce on your setup? Could you
>> please check and let me know if this works for you or if you have
>> an idea on this issue?
> 
> I cannot reproduce this on MinnowMax board. My testing env is one USB
> 2.0 flash disk connected to the upper port and another USB 3.0 flash
> disk connected to the bottom port. Please check log below.

Thanks for testing. This issue seems to be related to the HSIC ports
only connected to the xHCI and not the EHCI. I did the same test with
USB memory devices connected to the "normal" USB ports that are also
connected to the EHCI and they "survive" the reset the same way
as your test on MinnowMax shows. I assume that those HSIC ports are
not available / connected on MinnowMax, right?

Do you by any chance have some ideas on why this might be handled
differently on these HSIC ports?

Thanks,
Stefan