linux-kernel - Re: [PATCH 02/12] soc: qcom: aoss: Drop power domain support

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Date:   Tue, 27 Apr 2021 11:55:45 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     bjorn.andersson@...aro.org, mathieu.poirier@...aro.org,
        robh+dt@...nel.org, ulf.hansson@...aro.org, rjw@...ysocki.net,
        agross@...nel.org, ohad@...ery.com, linux-arm-msm@...r.kernel.org,
        linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dianders@...omium.org,
        rishabhb@...eaurora.org, sidgup@...eaurora.org
Subject: Re: [PATCH 02/12] soc: qcom: aoss: Drop power domain support

On 2021-04-18 07:31, Stephen Boyd wrote:
> Quoting Sibi Sankar (2021-04-16 05:03:48)
>> The load state resources are expected to follow the life cycle of the
>> remote processor it tracks. However, modeling load state resources as
>> power-domains result in them getting turned off during system suspend
>> and thereby falling out of sync with the remote processors that are 
>> still
>> on. Fix this by replacing load state resource control through the 
>> generic
>> qmp message send interface instead.
>> 
>> Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
>> ---
> 
> Is it possible to keep this code around for a cycle so that there isn't
> the chance that someone is using the deprecated DT bindings with a new
> kernel? I worry that ripping the code out will cause them angst.

deprecated bindings with a newer kernel
shouldn't cause any problems since it is
the driver changes that make AOSS PD
mandatory or not. So the newer kernel will
just use qmp_send and leave the PD unused.

> Certainly we have to keep the code in place until DT is updated, so 
> this
> patch should come last?

sure I don't mind, as long as it simplifies
the merge process.

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