linux-kernel - Re: [PATCH] arm64: dts: qcom: sm8250: Disable the not yet supported cluster idle state

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Message-ID: <20221027130515.uixhr4a7axmvtabe@bogus>
Date:   Thu, 27 Oct 2022 14:05:15 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Maulik Shah <quic_mkshah@...cinc.com>,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        Amit Pundir <amit.pundir@...aro.org>,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sm8250: Disable the not yet supported
 cluster idle state

On Thu, Oct 27, 2022 at 01:57:45PM +0200, Ulf Hansson wrote:
> To support the deeper cluster idle state for sm8250 platforms, some
> additional synchronization is needed between the rpmh-rsc device and the
> CPU cluster PM domain. Until that is supported, let's disable the cluster
> idle state.
> 
> This fixes a problem that has been reported for the Qcom RB5 platform (see
> below), but most likely other sm8250 platforms suffers from similar issues,
> so let's make the fix generic for sm8250.
> 
> vreg_l11c_3p3: failed to enable: -ETIMEDOUT
> qcom-rpmh-regulator 18200000.rsc:pm8150l-rpmh-regulators: ldo11: devm_regulator_register() failed, ret=-110
> qcom-rpmh-regulator: probe of 18200000.rsc:pm8150l-rpmh-regulators failed with error -110
> 
> Reported-by: Amit Pundir <amit.pundir@...aro.org>
> Fixes: 32bc936d7321 ("arm64: dts: qcom: sm8250: Add cpuidle states")

Thanks for the patience and fixing it this way :). I take it is only the
cluster states that has the issue because [1] only disables the CPU level
states which was confusing and I had asked the same.

Anyways for this,

Reviewed-by: Sudeep Holla <sudeep.holla@....com>

-- 
Regards,
Sudeep