linux-kernel - Re: [RESEND v4 3/3] arm64: dts: qcom: sc7280: Add power-domains for cpuidle states

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Date: Fri, 15 Mar 2024 15:24:31 +0000
From: Sudeep Holla <sudeep.holla@....com>
To: Doug Anderson <dianders@...omium.org>
Cc: Maulik Shah <quic_mkshah@...cinc.com>, andersson@...nel.org,
	Sudeep Holla <sudeep.holla@....com>, ulf.hansson@...aro.org,
	swboyd@...omium.org, wingers@...gle.com, daniel.lezcano@...aro.org,
	rafael@...nel.org, linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	jwerner@...omium.org, quic_lsrao@...cinc.com,
	quic_rjendra@...cinc.com, devicetree@...r.kernel.org,
	Abhinav Kumar <quic_abhinavk@...cinc.com>,
	Jessica Zhang <quic_jesszhan@...cinc.com>,
	Rob Clark <robdclark@...omium.org>
Subject: Re: [RESEND v4 3/3] arm64: dts: qcom: sc7280: Add power-domains for
 cpuidle states

On Thu, Mar 14, 2024 at 04:20:59PM -0700, Doug Anderson wrote:
> Hi,
> 
> On Mon, Jul 3, 2023 at 1:56 AM Maulik Shah <quic_mkshah@...cinc.com> wrote:
> >
> > Add power-domains for cpuidle states to use psci os-initiated idle states.
> >
> > Cc: devicetree@...r.kernel.org
> > Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
> > Signed-off-by: Maulik Shah <quic_mkshah@...cinc.com>
> > ---
> >  arch/arm64/boot/dts/qcom/sc7280.dtsi | 98 +++++++++++++++++++++-------
> >  1 file changed, 73 insertions(+), 25 deletions(-)
> 
> FWIW, I dug up an old sc7280-herobrine board to test some other change
> and found it no longer booted. :( I bisected it and this is the change
> that breaks it. Specifically, I can make mainline boot with:
> 
> git revert --no-edit db5d137e81bc # arm64: dts: qcom: sc7280: Update
> domain-idle-states for cluster sleep
> git revert --no-edit 7925ca85e956 # arm64: dts: qcom: sc7280: Add
> power-domains for cpuidle states
>

IIRC, this could be issue with psci firmware. There were some known
issues which were discussed few years back but I am not aware of the
details and if/how it is applicable here.

Not sure if you are getting any logs during the boot, if you do have
worth look at logs related to PSCI/OSI/Idle/...

-- 
Regards,
Sudeep