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(h-178-174-189-39.A498.priv.bahnhof.se. [178.174.189.39]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-52ca2872241sm1787003e87.124.2024.06.19.07.09.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Jun 2024 07:09:03 -0700 (PDT) From: Ulf Hansson To: Viresh Kumar , Nishanth Menon , Stephen Boyd Cc: Bjorn Andersson , Konrad Dybcio , Nikunj Kela , Prasad Sodagudi , Thierry Reding , Jonathan Hunter , Ulf Hansson , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/7] OPP/pmdomain: Assign required_devs for required OPPs through genpd Date: Wed, 19 Jun 2024 16:08:42 +0200 Message-Id: <20240619140849.368580-1-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Through dev_pm_opp_set_config() the _opp_attach_genpd() allows consumer drivers to hook up a device to its PM domains. This works for both a single and multiple 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, but there are some problems. Especially as the index for a "required-opps" may not necessarily need to match the index for the "power-domain" in DT, in which case things gets screwed up. This series intends to improve the situation, but it's also the first step to enable consumers of _opp_attach_genpd() to start migrating to use the new dev_pm_domain_attach_list() instead. Down the road, we should then be able to drop _opp_attach_genpd() completely. To test this, I have used a QEMU setup, with local PM test-drivers to try to test all various combinations of single/multi power/performance PM domains for a device. Hopefully I have covered it all, but I would certainly appreciate if someone could help to run a slew of tests on some HWs. Note: Patch1 is actually a fix that has been posted [1] separately too. I decided to include here for completeness. Kind regards Ulf Hansson [1] https://lore.kernel.org/linux-kernel/20240618155013.323322-1-ulf.hansson@linaro.org/ Ulf Hansson (7): OPP: Fix support for required OPPs for multiple PM domains OPP: Drop a redundant in-parameter to _set_opp_level() OPP: Rework _set_required_devs() to manage a single device per call OPP: Introduce an OF helper function to inform if required-opps is used pmdomain: core: Manage the default required OPP from a separate function OPP/pmdomain: Set the required_dev for a required OPP during genpd attach pmdomain: core: Drop the redundant dev_to_genpd_dev() drivers/opp/core.c | 185 ++++++++++++++++++-------------------- drivers/opp/of.c | 32 +++++++ drivers/opp/opp.h | 4 +- drivers/pmdomain/core.c | 103 ++++++++++++++++----- include/linux/pm_domain.h | 6 -- include/linux/pm_opp.h | 16 +++- 6 files changed, 215 insertions(+), 131 deletions(-)