Commit fee22854 authored Nov 05, 2019 by Dmitry Osipenko Committed by Chanwoo Choi Nov 06, 2019

PM / devfreq: tegra30: Tune up MCCPU boost-down coefficient



MCCPU boosts up very aggressively by 800% and boosts down very mildly by
10%. This doesn't work well when system is idling because the very slow
de-boosting results in lots of consecutive-down interrupts, in result
memory stays clocked high and CPU doesn't enter deepest idling state
instead of keeping memory at lowest freq and having CPU cluster turned
off. A more faster de-boosting fixes the case of idling system and doesn't
affect the case of an active system.

Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

parent f61ee201

drivers/devfreq/tegra30-devfreq.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -124,7 +124,7 @@ static const struct tegra_devfreq_device_config actmon_device_configs[] = {
		.offset = 0x200,
		.irq_mask = 1 << 25,
		.boost_up_coeff = 800,
		.boost_down_coeff = 90,
		.boost_down_coeff = 40,
		.boost_up_threshold = 27,
		.boost_down_threshold = 10,
		.avg_dependency_threshold = 16000, /* 16MHz in kHz units */

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