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PM / devfreq: tegra30: Make CPUFreq notifier to take into account boosting

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We're taking into account both HW memory-accesses + CPU activity based on
current CPU's frequency. For memory-accesses there is a kind of hysteresis
in a form of "boosting" which is managed by the tegra30-devfreq driver.
If current HW memory activity is higher than activity judged based of the
CPU's frequency, then there is no need to schedule cpufreq_update_work
because the result of the work will be a NO-OP. And thus,
tegra_actmon_cpufreq_contribution() should return 0, meaning that at the
moment CPU frequency doesn't contribute anything to the final decision
about required memory clock rate.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Dmitry Osipenko 2020-04-03 01:24:48 +03:00 committed by Chanwoo Choi
parent 9cb1fd0efd
commit d2216ba3eb
1 changed files with 1 additions and 1 deletions
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2
drivers/devfreq/tegra30-devfreq.c
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@ -420,7 +420,7 @@ tegra_actmon_cpufreq_contribution(struct tegra_devfreq *tegra,
static_cpu_emc_freq = actmon_cpu_to_emc_rate(tegra, cpu_freq);
if (dev_freq >= static_cpu_emc_freq)
if (dev_freq + actmon_dev->boost_freq >= static_cpu_emc_freq)
return 0;
return static_cpu_emc_freq;