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authorDmitry Osipenko <digetx@gmail.com>2019-11-05 00:56:16 +0300
committerChanwoo Choi <cw00.choi@samsung.com>2019-11-06 12:04:01 +0900
commitfee22854c0273569836de2039d9c432ea4df2cfc (patch)
tree379d1c497d6ecfc49c42157c5ebd78f2b63c7015 /drivers/devfreq
parentf61ee201068ac844cc8ed7f9112e47f3452f8262 (diff)
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>
Diffstat (limited to 'drivers/devfreq')
-rw-r--r--drivers/devfreq/tegra30-devfreq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
index e44f1a48f838..0b65f89d74d5 100644
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -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 */