[v4,00/11] OPP/pmdomain: Simplify assignment of required_devs for required OPPs

Message

Ulf Hansson Oct. 2, 2024, 12:22 p.m. UTC

Note, due to dependencies this whole series is best funneled together through my
pmdomain tree. Thus I am looking acks/reviews/tests.

Changes in v4:
	- We realized that genpd can't solely be responsible for assigning
	required-devs. In particular in the multiple PM domain case, we need
	platform code to specify the index for a device's required OPPs [1].
	In this version we take that into account by extending
	dev_pm_domain_attach_list() to cope with required OPPs too.

[1]
https://lore.kernel.org/all/[e-mail]/

Through dev_pm_opp_set_config() the *_opp_attach_genpd() allows consumer
drivers to attach a device to its PM domains. Their corresponding virtual
devices that are created by genpd during attach, are later being assigned
as the required_devs for the corresponding required OPPs. In principle,
this works fine.

However, attaching a device to its PM domains is in general better done
with dev_pm_domain_attach|detach_list(). To avoid having two different ways
to manage this, this series prepares for the removal of *_opp_attach_genpd()
to finally also remove it.

Kind regards
Ulf Hansson


Ulf Hansson (11):
  Revert "drm/tegra: gr3d: Convert into
    dev_pm_domain_attach|detach_list()"
  PM: domains: Fix alloc/free in dev_pm_domain_attach|detach_list()
  OPP: Rework _set_required_devs() to manage a single device per call
  PM: domains: Support required OPPs in dev_pm_domain_attach_list()
  pmdomain: core: Manage the default required OPP from a separate
    function
  pmdomain: core: Set the required dev for a required OPP during genpd
    attach
  OPP: Drop redundant code in _link_required_opps()
  drm/tegra: gr3d: Convert into devm_pm_domain_attach_list()
  media: venus: Convert into devm_pm_domain_attach_list() for OPP PM
    domain
  cpufreq: qcom-nvmem: Convert to dev_pm_domain_attach|detach_list()
  OPP: Drop redundant *_opp_attach|detach_genpd()

 drivers/base/power/common.c                   |  44 +++-
 drivers/cpufreq/qcom-cpufreq-nvmem.c          |  82 +++-----
 drivers/gpu/drm/tegra/gr3d.c                  |  11 +-
 drivers/media/platform/qcom/venus/core.c      |   8 +-
 drivers/media/platform/qcom/venus/core.h      |   6 +-
 .../media/platform/qcom/venus/pm_helpers.c    |  44 +---
 drivers/opp/core.c                            | 198 +++++-------------
 drivers/opp/of.c                              |  39 +---
 drivers/opp/opp.h                             |   5 +-
 drivers/pmdomain/core.c                       |  76 +++++--
 include/linux/pm_domain.h                     |   9 +
 include/linux/pm_opp.h                        |  42 +---
 12 files changed, 210 insertions(+), 354 deletions(-)