[V3] PCI: fu740: Drop to 2.5GT/s to fix initial device probing on some boards

Ben Dooks ben.dooks at codethink.co.uk
Sun May 29 08:56:44 PDT 2022


On 02/05/2022 12:46, Maciej W. Rozycki wrote:
> Hi Ben,
> 
>>>    Any idea what might be causing it?  I can't see it being explicitly set
>>> or cleared anywhere, be it in U-Boot or Linux, so it must be done by the
>>> device itself depending on something.  And the lack of this capability
>>> seems to me like non-compliance for a multiple-lane, multiple-speed
>>> device.
>>
>> I'll see if we can reproduce this
> 
>   Have you been able to look into it?
> 

I can't see anything obvious from the code, however my SD card image
does not have lspci on it and I have not had time to make a new image
to test.

I wonder if anyone at SiFive can comment on this?

-- 
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius

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