linux-kernel - [PATCH V2 0/5] PM / Domains: Allow performance state propagation

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Date:   Mon, 26 Nov 2018 13:39:59 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     ulf.hansson@...aro.org, Rafael Wysocki <rjw@...ysocki.net>,
        Kevin Hilman <khilman@...nel.org>,
        Len Brown <len.brown@...el.com>, Nishanth Menon <nm@...com>,
        Pavel Machek <pavel@....cz>, Stephen Boyd <sboyd@...nel.org>,
        Viresh Kumar <vireshk@...nel.org>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        rnayak@...eaurora.org, niklas.cassel@...aro.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: [PATCH V2 0/5] PM / Domains: Allow performance state propagation

Hi,

This series adds performance state propagation support in genpd core.
The propagation happens from the sub-domains to their masters. More
details can be found in the individual commit logs.

This is tested on hikey960 by faking power domains in such a way that
the CPU devices have two power domains and both of them have the same
master domain. The CPU device, as well as its power domains have
"required-opps" property set and the performance requirement from the
CPU eventually configures all the domains (2 sub-domains and 1 master).

Based on opp/linux-next branch (which is 4.20-rc1 +
multiple-power-domain-support-in-opp-core + some OPP fixes).

v1->V2:
- First patch (1/5) is new and an improvement to earlier stuff.
- Move genpd_status_on() check to _genpd_reeval_performance_state() from
  _genpd_set_performance_state().
- Improve dev_pm_opp_xlate_performance_state() to handle 1:1 pstate
  mapping between genpd and its master and also to fix a problem while
  finding the dst_table.
- Handle pstate=0 case properly.

--
viresh

Viresh Kumar (5):
  OPP: Improve _find_table_of_opp_np()
  OPP: Add dev_pm_opp_xlate_performance_state() helper
  PM / Domains: Save OPP table pointer in genpd
  PM / Domains: Factorize dev_pm_genpd_set_performance_state()
  PM / Domains: Propagate performance state updates

 drivers/base/power/domain.c | 211 +++++++++++++++++++++++++++---------
 drivers/opp/core.c          |  59 ++++++++++
 drivers/opp/of.c            |  14 ++-
 include/linux/pm_domain.h   |   6 +
 include/linux/pm_opp.h      |   7 ++
 5 files changed, 244 insertions(+), 53 deletions(-)

-- 
2.19.1.568.g152ad8e3369a