From: Lukasz Luba <lukasz.luba@arm.com>
To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org
Cc: lukasz.luba@arm.com, dietmar.eggemann@arm.com,
linux-arm-kernel@lists.infradead.org, sboyd@kernel.org,
nm@ti.com, linux-samsung-soc@vger.kernel.org,
daniel.lezcano@linaro.org, rafael@kernel.org,
viresh.kumar@linaro.org, krzysztof.kozlowski@linaro.org,
alim.akhtar@samsung.com, m.szyprowski@samsung.com,
mhiramat@kernel.org
Subject: [RESEND][PATCH v2 0/4] Update Energy Model after chip binning adjusted voltages
Date: Fri, 22 Mar 2024 11:08:46 +0000 [thread overview]
Message-ID: <20240322110850.77086-1-lukasz.luba@arm.com> (raw)
Hi all,
This is a follow-up patch aiming to add EM modification due to chip binning.
The first RFC and the discussion can be found here [1].
It uses Exynos chip driver code as a 1st user. The EM framework has been
extended to handle this use case easily, when the voltage has been changed
after setup. On my Odroid-xu4 in some OPPs I can observe ~20% power difference.
According to that data in driver tables it could be up to ~29%.
This chip binning is applicable to a lot of SoCs, so the EM framework should
make it easy to update. It uses the existing OPP and DT information to
re-calculate the new power values.
Changes:
v2:
- removed 'ret' from error message which wasn't initialized (Christian)
v1:
- exported the OPP calculation function from the OPP/OF so it can be
used from EM fwk (Viresh)
- refactored EM updating function to re-use common code
- added new EM function which can be used by chip device drivers which
modify the voltage in OPPs
RFC is at [1]
Regards,
Lukasz Luba
[1] https://lore.kernel.org/lkml/20231220110339.1065505-1-lukasz.luba@arm.com/
Lukasz Luba (4):
OPP: OF: Export dev_opp_pm_calc_power() for usage from EM
PM: EM: Change the em_adjust_new_capacity() to re-use code
PM: EM: Add em_dev_update_chip_binning()
soc: samsung: exynos-asv: Update Energy Model after adjusting voltage
drivers/opp/of.c | 17 +++--
drivers/soc/samsung/exynos-asv.c | 11 +++-
include/linux/energy_model.h | 5 ++
include/linux/pm_opp.h | 8 +++
kernel/power/energy_model.c | 109 +++++++++++++++++++++++++------
5 files changed, 125 insertions(+), 25 deletions(-)
--
2.25.1
next reply other threads:[~2024-03-22 11:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-22 11:08 Lukasz Luba [this message]
2024-03-22 11:08 ` [RESEND][PATCH v2 1/4] OPP: OF: Export dev_opp_pm_calc_power() for usage from EM Lukasz Luba
2024-03-26 2:51 ` Viresh Kumar
2024-03-26 8:29 ` Lukasz Luba
2024-03-22 11:08 ` [RESEND][PATCH v2 2/4] PM: EM: Change the em_adjust_new_capacity() to re-use code Lukasz Luba
2024-03-26 10:51 ` Dietmar Eggemann
2024-03-26 20:36 ` Lukasz Luba
2024-03-22 11:08 ` [RESEND][PATCH v2 3/4] PM: EM: Add em_dev_update_chip_binning() Lukasz Luba
2024-03-26 10:09 ` Dietmar Eggemann
2024-03-26 20:32 ` Lukasz Luba
2024-03-27 12:55 ` Dietmar Eggemann
2024-03-28 7:21 ` Dietmar Eggemann
2024-03-28 7:30 ` Lukasz Luba
2024-03-22 11:08 ` [RESEND][PATCH v2 4/4] soc: samsung: exynos-asv: Update Energy Model after adjusting voltage Lukasz Luba
2024-03-25 19:17 ` Krzysztof Kozlowski
2024-03-26 8:28 ` Lukasz Luba
2024-03-26 11:20 ` Dietmar Eggemann
2024-03-26 20:12 ` Lukasz Luba
2024-03-27 12:56 ` Dietmar Eggemann
2024-03-27 13:39 ` Lukasz Luba
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