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

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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>
This commit is contained in:
Dmitry Osipenko 2019-11-05 00:56:16 +03:00 committed by Chanwoo Choi
parent f61ee20106
commit fee22854c0
1 changed files with 1 additions and 1 deletions
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2
drivers/devfreq/tegra30-devfreq.c
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@ -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 */