66 lines
2.0 KiB
Diff
66 lines
2.0 KiB
Diff
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From 11983d8530e3d4e9cdd9e5cb7c23611adaf67c73 Mon Sep 17 00:00:00 2001
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From: Matthias Kaehlcke <mka@chromium.org>
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Date: Mon, 20 May 2019 15:00:50 -0700
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Subject: [PATCH 41/54] ARM: dts: rockchip: Use the GPU to cool CPU thermal
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zone of veyron mickey
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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On rk3288 the CPU and GPU temperatures are correlated. Limit the GPU
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frequency on veyron mickey to 400 MHz for CPU temperatures >= 65°C
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and to 300 MHz for CPU temperatures >= 85°C.
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This matches the configuration of the downstream Chrome OS 3.14 kernel,
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the 'official' kernel for mickey.
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Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
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Reviewed-by: Douglas Anderson <dianders@chromium.org>
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Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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---
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arch/arm/boot/dts/rk3288-veyron-mickey.dts | 14 +++++++++++---
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1 file changed, 11 insertions(+), 3 deletions(-)
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diff --git a/arch/arm/boot/dts/rk3288-veyron-mickey.dts b/arch/arm/boot/dts/rk3288-veyron-mickey.dts
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index 52f6abc22291..34797abe3403 100644
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--- a/arch/arm/boot/dts/rk3288-veyron-mickey.dts
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+++ b/arch/arm/boot/dts/rk3288-veyron-mickey.dts
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@@ -75,9 +75,7 @@
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cooling-maps {
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/*
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* After 1st level, throttle the CPU down to as low as 1.4 GHz
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- * and don't let the GPU go faster than 400 MHz. Note that we
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- * won't throttle the GPU lower than 400 MHz due to CPU
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- * heat--we'll let the GPU do the rest itself.
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+ * and don't let the GPU go faster than 400 MHz.
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*/
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cpu_warm_limit_cpu {
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trip = <&cpu_alert_warm>;
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@@ -86,6 +84,10 @@
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<&cpu2 THERMAL_NO_LIMIT 4>,
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<&cpu3 THERMAL_NO_LIMIT 4>;
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};
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+ cpu_warm_limit_gpu {
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+ trip = <&cpu_alert_warm>;
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+ cooling-device = <&gpu 1 1>;
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+ };
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/*
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* Add some discrete steps to help throttling system deal
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@@ -125,6 +127,12 @@
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<&cpu2 8 THERMAL_NO_LIMIT>,
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<&cpu3 8 THERMAL_NO_LIMIT>;
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};
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+
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+ /* At very hot, don't let GPU go over 300 MHz */
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+ cpu_very_hot_limit_gpu {
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+ trip = <&cpu_alert_very_hot>;
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+ cooling-device = <&gpu 2 2>;
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+ };
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};
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};
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--
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2.11.0
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