On rk3288 the CPU and GPU temperatures are correlated. Limit the GPU frequency on veyron mickey to 300 MHz for CPU temperatures >= 85°C.
This matches the configuration of the downstream Chrome OS 3.14 kernel, the 'official' kernel for mickey. Signed-off-by: Matthias Kaehlcke <[email protected]> --- Note: this patch depends on "ARM: dts: rockchip: Add #cooling-cells entry for rk3288 GPU" (https://lore.kernel.org/patchwork/patch/1075005/) --- arch/arm/boot/dts/rk3288-veyron-mickey.dts | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/boot/dts/rk3288-veyron-mickey.dts b/arch/arm/boot/dts/rk3288-veyron-mickey.dts index d889ab3c8235..f118d92a49d0 100644 --- a/arch/arm/boot/dts/rk3288-veyron-mickey.dts +++ b/arch/arm/boot/dts/rk3288-veyron-mickey.dts @@ -125,6 +125,12 @@ <&cpu2 8 THERMAL_NO_LIMIT>, <&cpu3 8 THERMAL_NO_LIMIT>; }; + + /* At very hot, don't let GPU go over 300 MHz */ + cpu_very_hot_limit_gpu { + trip = <&cpu_alert_very_hot>; + cooling-device = <&gpu 2 2>; + }; }; }; -- 2.21.0.1020.gf2820cf01a-goog
