Commit d2216ba3 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Chanwoo Choi
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PM / devfreq: tegra30: Make CPUFreq notifier to take into account boosting 



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: default avatarDmitry Osipenko <digetx@gmail.com>
Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
parent 9cb1fd0e

drivers/devfreq/tegra30-devfreq.c

+1 −1
Original line number Diff line number Diff line
@@ -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;