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From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Fri, 26 Jan 2024 17:12:12 +0100
Message-ID: <CAPDyKFoGozKrNrAc0vpnNVuKvnorAuN_fg37DU4j0rq=egJ6Hg@mail.gmail.com>
Subject: Re: [PATCH v2 0/5] PM: domains: Add helpers for multi PM domains to
 avoid open-coding
To: "Rafael J . Wysocki" <rafael@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>, Kevin Hilman <khilman@kernel.org>, 
	Konrad Dybcio <konrad.dybcio@linaro.org>, linux-pm@vger.kernel.org, 
	Viresh Kumar <viresh.kumar@linaro.org>, Bjorn Andersson <andersson@kernel.org>, 
	Nikunj Kela <nkela@quicinc.com>, Prasad Sodagudi <psodagud@quicinc.com>, 
	Stephan Gerhold <stephan@gerhold.net>, Ben Horgan <Ben.Horgan@arm.com>, linux-kernel@vger.kernel.org, 
	linux-arm-kernel@lists.infradead.org, linux-remoteproc@vger.kernel.org, 
	linux-media@vger.kernel.org
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On Fri, 5 Jan 2024 at 17:01, Ulf Hansson <ulf.hansson@linaro.org> wrote:
>
> Updates in v2:
>         - Ccing Daniel Baluta and Iuliana Prodan the NXP remoteproc patches to
>         requests help with testing.
>         - Fixed NULL pointer bug in patch1, pointed out by Nikunj.
>         - Added some tested/reviewed-by tags.
>
>
> Attaching/detaching of a device to multiple PM domains has started to become a
> common operation for many drivers, typically during ->probe() and ->remove().
> In most cases, this has lead to lots of boilerplate code in the drivers.
>
> This series adds a pair of helper functions to manage the attach/detach of a
> device to its multiple PM domains. Moreover, a couple of drivers have been
> converted to use the new helpers as a proof of concept.
>
> Note 1)
> The changes in the drivers have only been compile tested, while the helpers
> have been tested along with a couple of local dummy drivers that I have hacked
> up to model both genpd providers and genpd consumers.
>
> Note 2)
> I was struggling to make up mind if we should have a separate helper to attach
> all available power-domains described in DT, rather than providing "NULL" to the
> dev_pm_domain_attach_list(). I decided not to, but please let me know if you
> prefer the other option.
>
> Note 3)
> For OPP integration, as a follow up I am striving to make the
> dev_pm_opp_attach_genpd() redundant. Instead I think we should move towards
> using dev_pm_opp_set_config()->_opp_set_required_devs(), which would allow us to
> use the helpers that $subject series is adding.
>
> Kind regards
> Ulf Hansson

Rafael, Greg, do have any objections to this series or would you be
okay that I queue this up via my pmdomain tree?

Kind regards
Uffe

>
>
> Ulf Hansson (5):
>   PM: domains: Add helper functions to attach/detach multiple PM domains
>   remoteproc: imx_dsp_rproc: Convert to
>     dev_pm_domain_attach|detach_list()
>   remoteproc: imx_rproc: Convert to dev_pm_domain_attach|detach_list()
>   remoteproc: qcom_q6v5_adsp: Convert to
>     dev_pm_domain_attach|detach_list()
>   media: venus: Convert to dev_pm_domain_attach|detach_list() for vcodec
>
>  drivers/base/power/common.c                   | 134 +++++++++++++++
>  drivers/media/platform/qcom/venus/core.c      |  12 +-
>  drivers/media/platform/qcom/venus/core.h      |   7 +-
>  .../media/platform/qcom/venus/pm_helpers.c    |  48 ++----
>  drivers/remoteproc/imx_dsp_rproc.c            |  82 +--------
>  drivers/remoteproc/imx_rproc.c                |  73 +-------
>  drivers/remoteproc/qcom_q6v5_adsp.c           | 160 ++++++++----------
>  include/linux/pm_domain.h                     |  38 +++++
>  8 files changed, 289 insertions(+), 265 deletions(-)
>
> --
> 2.34.1