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

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Message-ID: <CAD=FV=Xwf4eW+zwPecDg5855nVEY2NQMqpvHu59_e2xma6=wxQ@mail.gmail.com>
Date: Fri, 31 May 2024 07:31:34 -0700
From: Doug Anderson <dianders@...omium.org>
To: Krishna Kurapati PSSNV <quic_kriskura@...cinc.com>
Cc: Konrad Dybcio <konrad.dybcio@...aro.org>, cros-qcom-dts-watchers@...omium.org, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Rob Herring <robh@...nel.org>, 
	Bjorn Andersson <andersson@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Stephen Boyd <swboyd@...omium.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Matthias Kaehlcke <mka@...omium.org>, linux-kernel@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
	quic_ppratap@...cinc.com, quic_jackp@...cinc.com
Subject: Re: [PATCH 0/2] Disable SS instances in park mode for SC7180/ SC7280

Hi,

On Fri, May 31, 2024 at 7:27 AM Krishna Kurapati PSSNV
<quic_kriskura@...cinc.com> 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!

-Doug