From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>
Cc: linux-tegra@vger.kernel.org
Subject: [PATCH v1 4/6] ARM: tegra: nexus7: Improve CPU passive-cooling threshold
Date: Mon, 26 Oct 2020 01:38:49 +0300 [thread overview]
Message-ID: <20201025223851.6984-5-digetx@gmail.com> (raw)
In-Reply-To: <20201025223851.6984-1-digetx@gmail.com>
The current CPU thermal limit is a bit inappropriate for Nexus 7 once
device is getting used on a daily bases. For example, currently it's may
be impossible to watch a hardware accelerated 720p video without hitting
a severe CPU throttling, which ruins user experience. This patch improves
the thermal throttling thresholds.
In my experience setting CPU thermal threshold to 57C provides the most
reasonable result, where device is a bit warm under constant load and
not getting overly hot, in the same time performance is okay. Let's bump
the passive-cooling threshold from 50C to 57C and also lower the thermal
hysteresis to 0.2C in order to make throttling more reactive.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi b/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi
index fa6bbec7cbc4..8d49860b135b 100644
--- a/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi
+++ b/arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi
@@ -1255,9 +1255,9 @@ cpu-thermal {
trips {
trip0: cpu-alert0 {
- /* start throttling at 50C */
- temperature = <50000>;
- hysteresis = <3000>;
+ /* throttle at 57C until temperature drops to 56.8C */
+ temperature = <57000>;
+ hysteresis = <200>;
type = "passive";
};
--
2.27.0
next prev parent reply other threads:[~2020-10-25 22:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-25 22:38 [PATCH v1 0/6] Nexus 7 and A500 device-tree improvements Dmitry Osipenko
2020-10-25 22:38 ` [PATCH v1 1/6] ARM: tegra: acer-a500: Correct thermal zone names Dmitry Osipenko
2020-10-25 22:38 ` [PATCH v1 2/6] ARM: tegra: acer-a500: Add power-supply to lvds-encoder node Dmitry Osipenko
2020-10-25 22:38 ` [PATCH v1 3/6] ARM: tegra: nexus7: Correct thermal zone names Dmitry Osipenko
2020-10-25 22:38 ` Dmitry Osipenko [this message]
2020-10-25 22:38 ` [PATCH v1 5/6] ARM: tegra: nexus7: Add power-supply to lvds-encoder node Dmitry Osipenko
2020-10-25 22:38 ` [PATCH v1 6/6] ARM: tegra: nexus7: Rename gpio-hog nodes Dmitry Osipenko
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