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From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>, rjw@rjwysocki.net
Cc: AngeloGioacchino Del Regno 
	<angelogioacchino.delregno@somainline.org>,
	linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, phone-devel@vger.kernel.org,
	konrad.dybcio@somainline.org, marijn.suijten@somainline.org,
	martin.botka@somainline.org, jeffrey.l.hugo@gmail.com,
	jami.kettunen@somainline.org,
	~postmarketos/upstreaming@lists.sr.ht,
	devicetree@vger.kernel.org, stephan@gerhold.net, robh@kernel.org,
	bartosz.dudziak@snejp.pl
Subject: Re: [PATCH v8 1/5] cpuidle: qcom_spm: Detach state machine from main SPM handling
Date: Sat, 14 Aug 2021 12:46:02 +0200	[thread overview]
Message-ID: <f688b8b4-4fdb-4497-22db-920bd67d255e@linaro.org> (raw)
In-Reply-To: <YQsbBQAdGhX7eO+5@builder.lan>

On 05/08/2021 00:56, Bjorn Andersson wrote:
> On Thu 29 Jul 10:56 CDT 2021, AngeloGioacchino Del Regno wrote:
> 
>> In commit a871be6b8eee ("cpuidle: Convert Qualcomm SPM driver to a generic
>> CPUidle driver") the SPM driver has been converted to a
>> generic CPUidle driver: that was mainly made to simplify the
>> driver and that was a great accomplishment;
>> Though, at that time, this driver was only applicable to ARM 32-bit SoCs,
>> lacking logic about the handling of newer generation SAW.
>>
>> In preparation for the enablement of SPM features on AArch64/ARM64,
>> split the cpuidle-qcom-spm driver in two: the CPUIdle related
>> state machine (currently used only on ARM SoCs) stays there, while
>> the SPM communication handling lands back in soc/qcom/spm.c and
>> also making sure to not discard the simplifications that were
>> introduced in the aforementioned commit.
>>
>> Since now the "two drivers" are split, the SCM dependency in the
>> main SPM handling is gone and for this reason it was also possible
>> to move the SPM initialization early: this will also make sure that
>> whenever the SAW CPUIdle driver is getting initialized, the SPM
>> driver will be ready to do the job.
>>
>> Please note that the anticipation of the SPM initialization was
>> also done to optimize the boot times on platforms that have their
>> CPU/L2 idle states managed by other means (such as PSCI), while
>> needing SAW initialization for other purposes, like AVS control.
>>
>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
>> Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
>> Tested-by: Stephan Gerhold <stephan@gerhold.net>
> 
> Rafael, Daniel, any objections to me picking this patch through the qcom
> tree?
> 

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>



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  reply	other threads:[~2021-08-14 10:46 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-29 15:56 [PATCH v8 0/5] Implement SPM/SAW for MSM8998 and SDM6xx AngeloGioacchino Del Regno
2021-07-29 15:56 ` [PATCH v8 1/5] cpuidle: qcom_spm: Detach state machine from main SPM handling AngeloGioacchino Del Regno
2021-08-04 22:56   ` Bjorn Andersson
2021-08-14 10:46     ` Daniel Lezcano [this message]
     [not found]   ` <CGME20211006110301eucas1p18bc37b15f562b2ffb13195ff3196b3d0@eucas1p1.samsung.com>
2021-10-06 11:02     ` Marek Szyprowski
2021-07-29 15:56 ` [PATCH v8 2/5] dt-bindings: soc: qcom: Add devicetree binding for QCOM SPM AngeloGioacchino Del Regno
2021-08-02 22:52   ` Rob Herring
2021-07-29 15:56 ` [PATCH v8 3/5] soc: qcom: spm: Implement support for SAWv4.1, SDM630/660 L2 AVS AngeloGioacchino Del Regno
2021-07-29 15:56 ` [PATCH v8 4/5] soc: qcom: spm: Add compatible for MSM8998 SAWv4.1 L2 AngeloGioacchino Del Regno
2021-07-29 15:56 ` [PATCH v8 5/5] dt-bindings: soc: qcom: spm: Document SDM660 and MSM8998 compatibles AngeloGioacchino Del Regno
2021-08-02 22:54   ` Rob Herring

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