Re: [RFC PATCH v3 2/3] PCI: rockchip-host: Retry link training on failure without PERST#

[Geraldo Nascimento <geraldogabriel@gmail.com>]

On Fri, Jul 18, 2025 at 11:46:33AM +0800, Shawn Lin wrote:
> 在 2025/07/18 星期五 11:33, Geraldo Nascimento 写道:
> > On Fri, Jul 18, 2025 at 09:55:42AM +0800, Shawn Lin wrote:
> >> Could you help tried this?
> >> [1] apply your patch 3 first
> > 
> > Sure, I'm always open for testing, but could you clarify the patch 3
> > part? AFAIK this series of mine only has 2 patches, so I'm a little
> > confused about exactly which patch to apply as a preliminary step.
> 
> Patch 3 refers to "arm64: dts: rockchip: drop PCIe 3v3 always-on and
> boot-on" which let kernel fully controller the power in case firmware
> did it in advanced.

Hi Shawn,

I tested your patch but unfortunately it does not work, PM981a SSD "plays
dead" and 2.5 GT/s training never completes, even with the bigger
timeout.

I hope you get the chance to test my patch soon, because once you share
your results there could be two possible scenarios:

1) Patch does not alleviate problem for you:
   If this is the case, then there's little I can do further and this
   becomes a wild goose chase, so no chance of upstreaming anything and
   I'll just move on to more useful work and leave everybody else to do
   their useful work too.

2) Patch works and previously non-working SSD is now working:
   In this case there's something serious going on and it is our mission
   to find a way to correctly upstream a fix.

Thanks,
Geraldo Nascimento