From mboxrd@z Thu Jan  1 00:00:00 1970
From: Niklas Cassel <niklas.cassel@linaro.org>
Subject: Re: [PATCH v2 7/9] arm64: dts: qcom: msm8998: Add PSCI cpuidle low
 power states
Date: Wed, 2 Oct 2019 11:27:34 +0200
Message-ID: <20191002092734.GA15523@centauri>
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To: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Cc: Amit Kucheria <amit.kucheria@linaro.org>, lkml <linux-kernel@vger.kernel.org>, MSM <linux-arm-msm@vger.kernel.org>, Bjorn Andersson <bjorn.andersson@linaro.org>, Andy Gross <agross@kernel.org>, Marc Gonzalez <marc.w.gonzalez@free.fr>, Sibi Sankar <sibis@codeaurora.org>, daniel.lezcano@linaro.org, David Brown <david.brown@linaro.org>, Li Yang <leoyang.li@nxp.com>, Shawn Guo <shawnguo@kernel.org>, DTML <devicetree@vger.kernel.org>
List-Id: devicetree@vger.kernel.org

On Wed, Oct 02, 2019 at 11:19:50AM +0200, Niklas Cassel wrote:
> On Mon, Sep 30, 2019 at 04:20:15PM -0600, Jeffrey Hugo wrote:
> > Amit, the merged version of the below change causes a boot failure
> > (nasty hang, sometimes with RCU stalls) on the msm8998 laptops.  Oddly
> > enough, it seems to be resolved if I remove the cpu-idle-states
> > property from one of the cpu nodes.
> > 
> > I see no issues with the msm8998 MTP.
> 
> Hello Jeffrey, Amit,
> 
> If the PSCI idle states work properly on the msm8998 devboard (MTP),
> but causes crashes on msm8998 laptops, the only logical change is
> that the PSCI firmware is different between the two devices.

Since the msm8998 laptops boot using ACPI, perhaps these laptops
doesn't support PSCI/have any PSCI firmware at all.


Kind regards,
Niklas