On Wed, Apr 3, 2024 at 5:49 PM Lukasz Luba <lukasz.luba@xxxxxxx> wrote: > > 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. > > It has dependency on Exynos SoC driver tree. > > Changes: > v5: > - adjusted aligning of the function arguments in patch 1/4 (Dietmar) > - adjusted the in-code comment patch 4/4 (Dietmar) > - added Reviewed-by to all patches (Dietmar) > v4: > - added asterisk in the comment section (test robot) > - change the patch 2/4 header name and use 'Refactor' > v3: > - updated header description patch 2/4 (Dietmar) > - removed 2 sentences from comment and adjusted in patch 3/4 (Dietmar) > - patch 4/4 re-phrased code comment (Dietmar) > - collected tags (Krzysztof, Viresh) > 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@xxxxxxx/ > > Lukasz Luba (4): > OPP: OF: Export dev_opp_pm_calc_power() for usage from EM > PM: EM: Refactor em_adjust_new_capacity() > 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 | 10 ++- > include/linux/energy_model.h | 5 ++ > include/linux/pm_opp.h | 8 +++ > kernel/power/energy_model.c | 106 +++++++++++++++++++++++++------ > 5 files changed, 121 insertions(+), 25 deletions(-) > > -- All patches in the series applied as 6.10 material, thanks!
