Rockchip Developer Guide Linux4.4 Thermal CN

Rockchip-Developer-Guide-Linux4.4-Thermal-CN

User Manual:

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Thermal开发指南

Linux4.4
2019-01-22 V1.0
Thermal  
0
ﬁnley.xiao@rock-chips.com
01.22
thermal
Thermal



1 Menuconﬁg
2 Tsadc
3 Power allocator
3.1 CPU
3.2 GPU 
3.3 Thermal Zone 
3.4 


1 
2 

Thermal governor Thermal

framework governor core cooling device sensor driver

Thermal governor cooling device Linux4.4

governor

power_allocator PID - - cooling device power

power

step_wise cooling device

fair share cooling device

userspace

Thermal core thermal governors thermal driver

Thermal sensor driver sensor tsadc

Thermal cooling device CPU GPU DDR

Governor

Cooling device

Core

Driver

3.1 Menuconﬁg

drivers/thermal/power_allocator.c  /* power allocator */

drivers/thermal/step_wise.c      /* step wise */

drivers/thermal/fair_share.c      /* fair share */

drivers/thermal/user_space.c      /* userspace */

drivers/thermal/devfreq_cooling.c

drivers/thermal/cpu_cooling.c

drivers/thermal/thermal_core.c

drivers/thermal/rockchip_thermal.c  /* RK3368 tsadc */

drivers/thermal/rk3368_thermal.c   /* RK3368 tsadc */

<*> Generic Thermal sysfs driver --->

--- Generic Thermal sysfs driver

[*]  APIs to parse thermal data out of device tree

[*]  Enable writable trip points

Default Thermal governor (power_allocator) ---> /* default thermal governor */

[ ]  Fair-share thermal governor

[ ]  Step_wise thermal governor           /* step_wise governor */

[ ]  Bang Bang thermal governor

[*]  User_space thermal governor           /* user_space governor */

-*-  Power allocator thermal governor        /* power_allocator governor */

[*]  generic cpu cooling support           /* cooling device */

[ ]  Generic clock cooling support

[*]  Generic device cooling support         /* cooling device */

[ ]  Thermal emulation mode support

< >  Temperature sensor driver for Freescale i.MX SoCs

<*>  Rockchip thermal driver             /* thermal sensor driver */

< >   rk_virtual thermal driver

<*>   rk3368 thermal driver legacy         /* thermal sensor driver */

“Default Thermal governor”

3.2 Tsadc

Tsadc thermal sensor DTSI DTS

RK3399 DTSI

DTS CRU GPIO

GPIO tsadc PMIC CRU

tsadc: tsadc@ff260000 {

compatible = "rockchip,rk3399-tsadc";

reg = <0x0 0xff260000 0x0 0x100>;        /* */

interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH 0>; /* */

assigned-clocks = <&cru SCLK_TSADC>;       /* 750KHz */

assigned-clock-rates = <750000>;

clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;  /* */

clock-names = "tsadc", "apb_pclk";

resets = <&cru SRST_TSADC>;           /* */

reset-names = "tsadc-apb";

rockchip,grf = <&grf>;              /* grf */

rockchip,hw-tshut-temp = <120000>;        /* 120 */

/* tsadc gpio otpout */

pinctrl-names = "gpio", "otpout";

pinctrl-0 = <&otp_gpio>;

pinctrl-1 = <&otp_out>;

* thermal sensor tsadc thermal sensor

* tsadc

* SoC tsadc 0 1

#thermal-sensor-cells = <1>;

status = "disabled";

};

/* IO */

pinctrl: pinctrl {

...

tsadc {

/* gpio */

otp_gpio: otp-gpio {

rockchip,pins = <1 6 RK_FUNC_GPIO &pcfg_pull_none>;

};

/* over temperature protection */

otp_out: otp-out {

rockchip,pins = <1 6 RK_FUNC_1 &pcfg_pull_none>;

};

....

}

"Documentation/devicetree/bindings/thermal/rockchip-thermal.txt"

3.3 Power allocator

Power allocator PID - - cooling device

power power power

3.3.1 CPU

CPU cooling device #cooling-cells dynamic-power-coeﬃcient

RK3399

3.3.2 GPU

GPU cooling device #cooling-cells power_model

RK3399

&tsadc {

rockchip,hw-tshut-mode = <1>;   /* tshut mode 0:CRU 1:GPIO */

rockchip,hw-tshut-polarity = <1>; /* tshut polarity 0:LOW 1:HIGH */

status = "okay";

};

cpu_l0: cpu@0 {

device_type = "cpu";

compatible = "arm,cortex-a53", "arm,armv8";

reg = <0x0 0x0>;

enable-method = "psci";

#cooling-cells = <2>; /* cooling device cooling device */

clocks = <&cru ARMCLKL>;

cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>;

dynamic-power-coefficient = <100>; /* C Pdyn=C*V^2*F */

};

...

cpu_b0: cpu@100 {

device_type = "cpu";

compatible = "arm,cortex-a72", "arm,armv8";

reg = <0x0 0x100>;

enable-method = "psci";

#cooling-cells = <2>; /* cooling device cooling device */

clocks = <&cru ARMCLKB>;

cpu-idle-states = <&CPU_SLEEP &CLUSTER_SLEEP>;

dynamic-power-coefficient = <436>; /* */

};

gpu: gpu@ff9a0000 {

compatible = "arm,malit860",

"arm,malit86x",

3.3.3 Thermal Zone

Termal zone

RK3399

"arm,malit8xx",

"arm,mali-midgard";

reg = <0x0 0xff9a0000 0x0 0x10000>;

interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH 0>,

<GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH 0>,

<GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH 0>;

interrupt-names = "GPU", "JOB", "MMU";

clocks = <&cru ACLK_GPU>;

clock-names = "clk_mali";

#cooling-cells = <2>; /* cooling device cooling device */

power-domains = <&power RK3399_PD_GPU>;

power-off-delay-ms = <200>;

status = "disabled";

gpu_power_model: power_model {

compatible = "arm,mali-simple-power-model";

static-coefficient = <411000>; /* */

dynamic-coefficient = <733>;  /* */

ts = <32000 4700 (-80) 2>;   /* */

thermal-zone = "gpu-thermal"; /* gpu-thermal */

};

thermal_zones: thermal-zones {

/* thermal zone */

soc_thermal: soc-thermal {

   /* trip-point-0 20ms */

polling-delay-passive = <20>; /* milliseconds */

   /* trip-point-0 1000ms */

polling-delay = <1000>; /* milliseconds */

   /* trip-point-1 cooling device */

sustainable-power = <1000>; /* milliwatts */

/* thermal zone tsadc0 */

thermal-sensors = <&tsadc 0>;

   /* trips */

trips {

     /*

      *

      * power

      */

threshold: trip-point-0 {

       /* 70 70 tsadc */

temperature = <70000>; /* millicelsius */

       /* temperature-hysteresis */

hysteresis = <2000>; /* millicelsius */

type = "passive"; /* polling-delay-passive */

};

     /* */

target: trip-point-1 {

       /* 85 85 tsadc */

temperature = <85000>; /* millicelsius */

        /* temperature-hysteresis */

hysteresis = <2000>; /* millicelsius */

type = "passive"; /* polling-delay-passive */

};

     /* */

soc_crit: soc-crit {

       /* 115 115 tsadc */

temperature = <115000>; /* millicelsius */

       /* temperature-hysteresis */

hysteresis = <2000>; /* millicelsius */

type = "critical"; /* */

};

   /* cooling device cooling device */

cooling-maps {

map0 {

       /*

        * target trip cooling device

        * power allocater target

        */

trip = <&target>;

       /* A53 cooloing device THERMAL_NO_LIMIT */

cooling-device =

<&cpu_l0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

contribution = <4096>; /* 4096/1024 */

};

map1 {

       /*

        * target trip cooling device

        * power allocater target

        */

trip = <&target>;

       /* A72 cooloing device THERMAL_NO_LIMIT */

cooling-device =

<&cpu_b0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

contribution = <1024>;/* 1024/1024 */

};

map2 {

       /*

        * target trip cooling device

        * power allocater target

        */

trip = <&target>;

       /* GPU cooloing device THERMAL_NO_LIMIT */

"Documentation/devicetree/bindings/thermal/thermal.txt" "Documentation/thermal/power_allocator.txt

3.3.4

70 85 115

cooling-device =

<&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

contribution = <4096>;/* 4096/1024 */

};

/* thermal zone thermal zone */

gpu_thermal: gpu-thermal {

   /* */

polling-delay-passive = <100>; /* milliseconds */

   /* 1000ms */

polling-delay = <1000>; /* milliseconds */

   /* thermal zone tsadc1 */

thermal-sensors = <&tsadc 1>;

};

thermal_zones: thermal-zones {

soc_thermal: soc-thermal {

....

trips {

threshold: trip-point-0 {

       /*

        * 70

        * sustainable-power

        */

temperature = <70000>; /* millicelsius */

hysteresis = <2000>; /* millicelsius */

type = "passive";

};

target: trip-point-1 {

       /* 85 */

temperature = <85000>; /* millicelsius */

hysteresis = <2000>; /* millicelsius */

type = "passive";

};

soc_crit: soc-crit {

       /* 115 */

temperature = <115000>; /* millicelsius */

2 cooling device

RK3399 CPU GPU

CPU

hysteresis = <2000>; /* millicelsius */

type = "critical";

};

   ...

 }

};

thermal_zones: thermal-zones {

soc_thermal: soc-thermal {

...

   /* A53 A72 GPU cooling device */

cooling-maps {

map0 {

trip = <&target>;

cooling-device =

<&cpu_l0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

contribution = <4096>;

};

map1 {

trip = <&target>;

cooling-device =

<&cpu_b0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

contribution = <1024>;

};

map2 {

trip = <&target>;

cooling-device =

<&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

contribution = <4096>;

};

   ...

};

thermal_zones: thermal-zones {

soc_thermal: soc-thermal {

...

   /* A53 A72 cooling device */

cooling-maps {

map0 {

trip = <&target>;

cooling-device =

<&cpu_l0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

contribution = <4096>;

3 sustainable-power

1 70 85 70 power

power power

70 sustainable

70 75

85 75 power cooling

device

RK3399 A53 A72 GPU 1416MHz 1125mV

1800MHz 1200mV 800MHz 1100mV

};

map1 {

trip = <&target>;

cooling-device =

<&cpu_b0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

contribution = <1024>;

};

   ...

};

/* a b c d C DTSI T V */

t_scale = (a * T^3) + (b * T^2) + (c * T) + d

 v_scale = V^3

 P(s)= C * T_scale * V_scale

/* C DTSI V F */

P(d)= C * V^2 * F

A53 C = 100 dynamic-power-coefficient 100 V = 1125mV F = 1416MHz

P_d_a53 = 100 * 1125 * 1125 * 1416 * 4 / 1000000000 = 716 mW

A72 C = 436 dynamic-power-coefficient 436 V = 1200mV F = 1800MHz

P_d_a72 = 436 * 1200 * 1200 * 1800 * 2 / 1000000000 = 2260 mW

GPU C = 733 dynamic-coefficient 733 V = 1100mV F = 800MHz

P_d_gpu = 733 * 1100 * 1100 * 800 / 1000000000 = 709 mW

GPU DTSI static-coefficient 411000 ts 32000 4700 -80 2C = 411000

a = 2b = -80 c = 4700 d = 32000 T = 75000mC V = 1100mV

t_scale = ( 2 * 75000 * 75000 * 75000 / 1000000 ) + ( -80 * 75000 * 75000 / 1000) +

 ( 4700 * 75000 ) + 32000 * 1000 = 778250

v_scale = 1100 * 1100 * 1100 / 1000000 = 1331

75 75 power power sustainable

DTSI sustainable-power 1761 Antutu Geekbench trace

lisa

4 contribution

cooling device contribution 1024

A53 A72 A53 A72 A53

contribution

5 trace

menuconﬁg trace

P_s_gpu = 411000 * 778250 / 1000000 * 1331 / 1000000 = 425mW

P_max = P_d_a53 + P_d_a72 + P_d_gpu + P_s_gpu = 4110mW

GPU exel

sustainable + 2 * sustainable / (target- threshold) * (target- 75) = P_75

sustainable + 2 * sustainable / (85 - 70) * (85 - 75) = 4110

sustainable = 1761mW

thermal_zones: thermal-zones {

soc_thermal: soc-thermal {

...

cooling-maps {

map0 {

trip = <&target>;

cooling-device =

<&cpu_l0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

contribution = <4096>; /* 1024 4096 */

};

map1 {

trip = <&target>;

cooling-device =

<&cpu_b0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;

contribution = <1024>;

};

   ...

};

Kernel hacking --->

[*] Tracers --->

trace-cmd log lisa trace-cmd lisa lisa adb

trace-cmd push log

Ctrl+C log trace.dat

adb pull PC lisa trace.dat pull PC PC

trace-cmd trace.txt

trace-cmd log

trace

adb pull

--- Tracers

[ ]  Kernel Function Tracer

[ ]  Enable trace events for preempt and irq disable/enable

[ ]  Interrupts-off Latency Tracer

[ ]  Preemption-off Latency Tracer

[ ]  Scheduling Latency Tracer

[*]  Trace process context switches and events

[ ]  Trace syscalls

[ ]  Create a snapshot trace buffer

Branch Profiling (No branch profiling) --->

[ ]  Trace max stack

[ ]  Support for tracing block IO actions

[ ]  Add tracepoint that benchmarks tracepoints

< >  Ring buffer benchmark stress tester

[ ]  Ring buffer startup self test

[ ]  Show enum mappings for trace events

[*]  Trace gpio events

/* -b Kb DDR */

trace-cmd record -e thermal -e thermal_power_allocator -b 102400

trace-cmd report trace.dat > trace.txt

echo 1 > /sys/kernel/debug/tracing/events/thermal/enable

echo 1 > /sys/kernel/debug/tracing/events/thermal_power_allocator/enable

echo 1 > /sys/kernel/debug/tracing/tracing_on

cat /sys/kernel/debug/tracing/trace

/* trace.txt lisa */

adb pull /sys/kernel/debug/tracing/trace ./trace.txt

/sys/class/thermal/ DTSI thermal zone thermal

zone /sys/class/thermal/ thermal_zone0

/sys/class/thermal/ thermal_zone0 thermal_zone1

RK3399 /sys/class/thermal/thermal_zone0/

“Documentation/thermal/sysfs-api.txt”

5.1

menuconﬁg user_space

echo 0 > /sys/kernel/debug/tracing/tracing_on /* */

echo 0 > /sys/kernel/debug/tracing/trace    /* */

temp          /* */

available_policies /* */

policy /* */

sustainable_power /* power */

integral_cutoff /* PID I - <integral_cutoff */

k_d /* PID D */

k_i /* PID I */

k_po /* PID P */

k_pu /* PID P */

mode /* enabled disabled */

type /* thermal zone */

/* trips */

trip_point_0_hyst

trip_point_0_temp

trip_point_0_type

trip_point_1_hyst

trip_point_1_temp

trip_point_1_type

trip_point_2_hyst

trip_point_2_temp

trip_point_2_type

/* cooling devic cooling-maps */

cdev0 /* cooling devic cdev1 cdev2 */

cur_state /* cooling device */

max_state /* cooling device */

type /* cooling device */

cdev0_weight /* cooling devic power */

user_space policy user_space mode

disabled cdev cur_state 0

RK3399 user_space

mode disabled

5.2

thermal_zone0 thermal_zone1 temp

RK3399 CPU

GPU



<*> Generic Thermal sysfs driver --->

--- Generic Thermal sysfs driver

[*]  APIs to parse thermal data out of device tree

[*]  Enable writable trip points

Default Thermal governor (user_space) ---> /* power_allocator user_space */

echo user_space > /sys/class/thermal/thermal_zone0/policy

echo disabled > /sys/class/thermal/thermal_zone0/mode

/* cdev */

echo 0 > /sys/class/thermal/thermal_zone0/cdev0/cur_state

echo 0 > /sys/class/thermal/thermal_zone0/cdev1/cur_state

echo 0 > /sys/class/thermal/thermal_zone0/cdev2/cur_state

cat /sys/class/thermal/thermal_zone0/temp

cat /sys/class/thermal/thermal_zone1/temp

Rockchip Developer Guide Linux4.4 Thermal CN

Rockchip-Developer-Guide-Linux4.4-Thermal-CN

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