Re: [PATCH] arm64: dts: qcom: sm6115: Set up CPU cooling maps

From: Bjorn Andersson
Date: Tue Apr 18 2023 - 11:48:21 EST

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In reply to: Konrad Dybcio: "Re: [PATCH] arm64: dts: qcom: sm6115: Set up CPU cooling maps"
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On Tue, Apr 18, 2023 at 03:01:47PM +0200, Konrad Dybcio wrote:
>
>
> On 18.04.2023 15:02, Bjorn Andersson wrote:
> > On Tue, Apr 18, 2023 at 01:56:56PM +0200, Konrad Dybcio wrote:
> >> Set up CPU cooling maps to ensure the thermal framework is aware of
> >> the connection between the CPUs and the TSENS sensors.
> >>
> >> All of the maps refer to all 4 CPUs within a given cluster at a time,
> >> as that's what can be considered the smallest DVFS target unit - they
> >> all share the same voltage line and clock source.
> >>
> >
> > Generally software based CPU cooling is considered too slow to cope with
> > CPU core temperature changes, and the limits hardware working together
> > with OSM/EPSS will do a better job maintaining appropriate core
> > temperature levels.
> >
> > Is there a reason why this can't be used/relied upon on this platform?
> I haven't set up LMH yet and the default limits, at least with my dubious
> meta build, seem to let the board go to 75degC with just 4 cores working..
>
> Not sure if there's a voltage droop when I let it go full throttle or
> something, but pushing it to the limit definitely causes the board to be
> (even) less stable..
>
> >
> >
> > PS. Amending this mechanism with software based cooling to keep the
> > system at a reasonable/lower temperature is a good idea.
> We don't like burned chips around here!
>

Limits hardware will help you with that, software based cooling will
help avoid burning the user.

Regards,
Bjorn

> Konrad
> >
> > Regards,
> > Bjorn
> >
> >> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> >> ---
> >> arch/arm64/boot/dts/qcom/sm6115.dtsi | 137 +++++++++++++++++++++++++++++++++++
> >> 1 file changed, 137 insertions(+)
> >>
> >> diff --git a/arch/arm64/boot/dts/qcom/sm6115.dtsi b/arch/arm64/boot/dts/qcom/sm6115.dtsi
> >> index 631ca327e064..36ff913c1a60 100644
> >> --- a/arch/arm64/boot/dts/qcom/sm6115.dtsi
> >> +++ b/arch/arm64/boot/dts/qcom/sm6115.dtsi
> >> @@ -12,6 +12,7 @@
> >> #include <dt-bindings/gpio/gpio.h>
> >> #include <dt-bindings/interrupt-controller/arm-gic.h>
> >> #include <dt-bindings/power/qcom-rpmpd.h>
> >> +#include <dt-bindings/thermal/thermal.h>
> >>
> >> / {
> >> interrupt-parent = <&intc>;
> >> @@ -47,6 +48,8 @@ CPU0: cpu@0 {
> >> enable-method = "psci";
> >> next-level-cache = <&L2_0>;
> >> qcom,freq-domain = <&cpufreq_hw 0>;
> >> + #cooling-cells = <2>;
> >> +
> >> L2_0: l2-cache {
> >> compatible = "cache";
> >> cache-level = <2>;
> >> @@ -63,6 +66,7 @@ CPU1: cpu@1 {
> >> enable-method = "psci";
> >> next-level-cache = <&L2_0>;
> >> qcom,freq-domain = <&cpufreq_hw 0>;
> >> + #cooling-cells = <2>;
> >> };
> >>
> >> CPU2: cpu@2 {
> >> @@ -75,6 +79,7 @@ CPU2: cpu@2 {
> >> enable-method = "psci";
> >> next-level-cache = <&L2_0>;
> >> qcom,freq-domain = <&cpufreq_hw 0>;
> >> + #cooling-cells = <2>;
> >> };
> >>
> >> CPU3: cpu@3 {
> >> @@ -87,6 +92,7 @@ CPU3: cpu@3 {
> >> enable-method = "psci";
> >> next-level-cache = <&L2_0>;
> >> qcom,freq-domain = <&cpufreq_hw 0>;
> >> + #cooling-cells = <2>;
> >> };
> >>
> >> CPU4: cpu@100 {
> >> @@ -99,6 +105,8 @@ CPU4: cpu@100 {
> >> dynamic-power-coefficient = <282>;
> >> next-level-cache = <&L2_1>;
> >> qcom,freq-domain = <&cpufreq_hw 1>;
> >> + #cooling-cells = <2>;
> >> +
> >> L2_1: l2-cache {
> >> compatible = "cache";
> >> cache-level = <2>;
> >> @@ -115,6 +123,7 @@ CPU5: cpu@101 {
> >> enable-method = "psci";
> >> next-level-cache = <&L2_1>;
> >> qcom,freq-domain = <&cpufreq_hw 1>;
> >> + #cooling-cells = <2>;
> >> };
> >>
> >> CPU6: cpu@102 {
> >> @@ -127,6 +136,7 @@ CPU6: cpu@102 {
> >> enable-method = "psci";
> >> next-level-cache = <&L2_1>;
> >> qcom,freq-domain = <&cpufreq_hw 1>;
> >> + #cooling-cells = <2>;
> >> };
> >>
> >> CPU7: cpu@103 {
> >> @@ -139,6 +149,7 @@ CPU7: cpu@103 {
> >> enable-method = "psci";
> >> next-level-cache = <&L2_1>;
> >> qcom,freq-domain = <&cpufreq_hw 1>;
> >> + #cooling-cells = <2>;
> >> };
> >>
> >> cpu-map {
> >> @@ -2471,6 +2482,24 @@ cpu4-thermal {
> >> polling-delay = <0>;
> >> thermal-sensors = <&tsens0 6>;
> >>
> >> + cooling-maps {
> >> + map0 {
> >> + trip = <&cpu4_alert0>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> +
> >> + map1 {
> >> + trip = <&cpu4_alert1>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> + };
> >> +
> >> trips {
> >> cpu4_alert0: trip-point0 {
> >> temperature = <90000>;
> >> @@ -2497,6 +2526,24 @@ cpu5-thermal {
> >> polling-delay = <0>;
> >> thermal-sensors = <&tsens0 7>;
> >>
> >> + cooling-maps {
> >> + map0 {
> >> + trip = <&cpu5_alert0>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> +
> >> + map1 {
> >> + trip = <&cpu5_alert1>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> + };
> >> +
> >> trips {
> >> cpu5_alert0: trip-point0 {
> >> temperature = <90000>;
> >> @@ -2523,6 +2570,24 @@ cpu6-thermal {
> >> polling-delay = <0>;
> >> thermal-sensors = <&tsens0 8>;
> >>
> >> + cooling-maps {
> >> + map0 {
> >> + trip = <&cpu6_alert0>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> +
> >> + map1 {
> >> + trip = <&cpu6_alert1>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> + };
> >> +
> >> trips {
> >> cpu6_alert0: trip-point0 {
> >> temperature = <90000>;
> >> @@ -2549,6 +2614,24 @@ cpu7-thermal {
> >> polling-delay = <0>;
> >> thermal-sensors = <&tsens0 9>;
> >>
> >> + cooling-maps {
> >> + map0 {
> >> + trip = <&cpu7_alert0>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> +
> >> + map1 {
> >> + trip = <&cpu7_alert1>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> + };
> >> +
> >> trips {
> >> cpu7_alert0: trip-point0 {
> >> temperature = <90000>;
> >> @@ -2575,6 +2658,24 @@ cpu45-thermal {
> >> polling-delay = <0>;
> >> thermal-sensors = <&tsens0 10>;
> >>
> >> + cooling-maps {
> >> + map0 {
> >> + trip = <&cpu45_alert0>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> +
> >> + map1 {
> >> + trip = <&cpu45_alert1>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> + };
> >> +
> >> trips {
> >> cpu45_alert0: trip-point0 {
> >> temperature = <90000>;
> >> @@ -2601,6 +2702,24 @@ cpu67-thermal {
> >> polling-delay = <0>;
> >> thermal-sensors = <&tsens0 11>;
> >>
> >> + cooling-maps {
> >> + map0 {
> >> + trip = <&cpu67_alert0>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> +
> >> + map1 {
> >> + trip = <&cpu67_alert1>;
> >> + cooling-device = <&CPU4 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU5 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU6 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU7 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> + };
> >> +
> >> trips {
> >> cpu67_alert0: trip-point0 {
> >> temperature = <90000>;
> >> @@ -2627,6 +2746,24 @@ cpu0123-thermal {
> >> polling-delay = <0>;
> >> thermal-sensors = <&tsens0 12>;
> >>
> >> + cooling-maps {
> >> + map0 {
> >> + trip = <&cpu0123_alert0>;
> >> + cooling-device = <&CPU0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> +
> >> + map1 {
> >> + trip = <&cpu0123_alert1>;
> >> + cooling-device = <&CPU0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
> >> + <&CPU3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
> >> + };
> >> + };
> >> +
> >> trips {
> >> cpu0123_alert0: trip-point0 {
> >> temperature = <90000>;
> >>
> >> ---
> >> base-commit: 4aa1da8d99724f6c0b762b58a71cee7c5e2e109b
> >> change-id: 20230418-topic-cool_bengal-2f5f3f47269c
> >>
> >> Best regards,
> >> --
> >> Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> >>

Next message: Lorenzo Stoakes: "[PATCH v4 0/6] remove the vmas parameter from GUP APIs"
Previous message: Rafael J. Wysocki: "Re: [Patch 1/6] cpufreq: use correct unit when verify cur freq"
In reply to: Konrad Dybcio: "Re: [PATCH] arm64: dts: qcom: sm6115: Set up CPU cooling maps"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]