[PATCH 3/4] configs: Increase USB Hub debounce timeout in Agilex5

[Marek Vasut]

On 8/29/25 6:19 PM, Ravulapalli, Naresh Kumar wrote:
> Hi Marek
> 
> On 29-Aug-25 2:11 PM, Marek Vasut wrote:
>>
>> On 8/8/25 12:04 PM, Naresh Kumar Ravulapalli wrote:
>>> Some USB devices need more time to be initialized. Hence,
>>> increasing the default USB Hub debounce timeout value for
>>> devices to be discovered, connected to Agilex5 boards.
>> Is this really hub debounce timeout or usb_pgood_delay ?
>>
>> Which devices are those, include that in the commit message.
> 
> Yes, timeout is related to USB connect/disconnect signal bounces not 
> about bus stability during init.
> 
> Issue was mainly observed with legacy flash drives. Maybe I will change 
> commit text from "Some USB devices need more time to be initialized..." 
> to "Some old USB flash drives need more time to be initialized during 
> connect or disconnect events ..."?
> 
> Note that I am not modifying the default Kconfig value in general; 
> change is only made for an SoCFPGA devkit we tested.
Does this same issue go away if you set usb_pgood_delay to 2000 or 
higher too ?