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

From: Ben Dooks
Date: Sun May 29 2022 - 11:57:29 EST


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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