[EXT] Re: [RFC] usb: xhci: Some USB devices fail to initialize

[Marek Vasut]

On 5/28/24 1:04 PM, Elena Popa wrote:
>>> We've noticed that, at least, on the i.MX8M* platforms
>>
>> Which exact platforms, which SoC, which board ?
> 
> Currently I'm testing on the i.MX8M Plus EVK.
>>
>>> , some USB devices (especially USB2.0 sticks) fail
>>
>> Which exact sticks ? USB IDs and model would be helpful.
> 
> The stick is from EBV Generic Flash Disk, VID: 0x058f PID: 0x6387
>>
>> Which U-Boot version is this ?
> 
> The 2 errors I already listed appears using the U-Boot v2023.04.
> 
> Now I also tested on the v2024.04. These are the 3 behaviors:
> - USB device fails to init with the error: "Device not responding to set address"
> - USB device fails to init with the error: "Cannot read configuration, skipping device 058f:6387"
> - USB device succeeded to init with the following output:
> scanning bus usb at 38200000 for devices... WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> WARN endpoint is halted
> 2 USB Device(s) found
>         scanning usb for storage devices... 1 Storage Device(s) found
> 
> The succeeded initialization is very random. Sometimes it works, sometimes not.
> 
> Looking at the commits, I saw some improvements in the xHCI driver, but still, this issue remains.
> 
> I also tried the quick fix of adding the 5ms delay for v2024.04, and it's working: the USB device succeeded to initialize every time.

Does it also work if you 'setenv usb_pgood_delay 2000' ?

Can you include the 5ms patch ?