thermal: cooling: Check Energy Model type in cpufreq_cooling and devfreq_cooling
authorLukasz Luba <lukasz.luba@arm.com>
Mon, 21 Mar 2022 09:57:28 +0000 (09:57 +0000)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Wed, 13 Apr 2022 14:26:18 +0000 (16:26 +0200)
commit9926bbec3ae6c10d4e6fc297afde6a7ef7ad640b
tree575e07f007359bea1867724c5268231913c2d68a
parent015f569c4649fe9595ed465dc8e4301d34937f8f
thermal: cooling: Check Energy Model type in cpufreq_cooling and devfreq_cooling

The Energy Model can now be artificial, which means the power values
are mathematically generated to leverage EAS while not expected to be on
an uniform scale with other devices providing power information. If this
EM type is in use, the thermal governor IPA should not be allowed to
operate, since the relation between cooling devices is not properly
defined. Thus, it might be possible that big GPU has lower power values
than a Little CPU. To mitigate a misbehaviour of the thermal control
algorithm, simply do not register the cooling device as IPA's power
actor.

Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
drivers/thermal/cpufreq_cooling.c
drivers/thermal/devfreq_cooling.c