Re: [PATCH 0/2] Disable SS instances in park mode for SC7180/ SC7280

From: Krishna Kurapati PSSNV
Date: Fri May 31 2024 - 10:53:00 EST




On 5/31/2024 8:11 PM, Konrad Dybcio wrote:
On 31.05.2024 4:31 PM, Doug Anderson wrote:
Hi,

On Fri, May 31, 2024 at 7:27 AM Krishna Kurapati PSSNV
<quic_kriskura@xxxxxxxxxxx> wrote:

My only guess is that somehow SC8280XP is faster and that changes the
timing of how it handles interrupts. I guess you could try capping
your cpufreq in sysfs and see if that makes a difference in
reproducing. ;-) ...or maybe somehow SC8280XP has a newer version of
the IP where they've fixed this?

It would be interesting if someone with a SDM845 dragonboard could try
replicating since that seems highly likely to reproduce, at least.


Hi Konrad, Doug,

Usually on downstream we set this quirk only for all Gen-1 targets
(not particularly for this testcase) but to avoid these kind of
controller going dead issues. I can filter out the gen-1 targets (other
than sc7280/sc7180) and send a separate series to add this quirk in all
of them.

Sounds like a plan to me!

Yep!

In case there are more gen1 platforms than what we have upstream, it would
be of great utility if you could list them all, so that we can have a reference
for future additions, Krishna.


I am not sure if I can give out info on targets that are not on upstream. I will check internally if I can do that. Else we can just ensure that from now on whenever a Gen-1 target is getting upstreamed, this quirk is set.

Regards,
Krishna,