[PATCH v5 0/3] thermal: mediatek: Add cpu dynamic power cooling model.

[PATCH v5 0/3] thermal: mediatek: Add cpu dynamic power cooling model.

[Dawei Chien]

Use Intelligent Power Allocation (IPA) technical to add dynamic power model
for binding CPU thermal zone. The power allocator governor allocates power
budget to control CPU temperature.

Power Allocator governor is able to keep SOC temperature within a defined
temperature range to avoid SOC overheat and keep it's performance.
mt8173-cpufreq.c need to register its' own power model with power allocator
thermal governor, so that power allocator governor can allocates suitable
power budget to control CPU temperature.

Binding document is refer to this patchset
https://lkml.org/lkml/2015/11/30/239

Change since V4:
1. Remove unnecessary error-checking for mt8173-cpufreq.c
2. Initializing variable capacitance with 0

Change since V3:
1. Remove static power model
2. Split V3's device tree in two for thermal zones and dynamic power models respectively

Change since V2:
1. Move dynamic/static power model in device tree

Change since V1:
1. Include mt8171.h and sort header file for mt8173.dtsi

Dawei Chien (3):
  thermal: mediatek: Add cpu dynamic power cooling model.
  arm64: dts: mt8173: Add thermal zone node.
  arm64: dts: mt8173: Add dynamic power node.

 arch/arm64/boot/dts/mediatek/mt8173.dtsi |   47 ++++++++++++++++++++++++++++++
 drivers/cpufreq/mt8173-cpufreq.c         |   12 ++++++--
 2 files changed, 57 insertions(+), 2 deletions(-)

--
1.7.9.5

[PATCH v5 1/3] thermal: mediatek: Add cpu dynamic power cooling model.

[Dawei Chien]

MT8173 cpufreq driver select of_cpufreq_power_cooling_register registering
cooling devices with dynamic power coefficient.

Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
---
This patch is base on patchset:
https://lkml.org/lkml/2015/11/17/251
---
 drivers/cpufreq/mt8173-cpufreq.c |   11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/mt8173-cpufreq.c b/drivers/cpufreq/mt8173-cpufreq.c
index 83001dc..d00bab5 100644
--- a/drivers/cpufreq/mt8173-cpufreq.c
+++ b/drivers/cpufreq/mt8173-cpufreq.c
@@ -263,17 +263,24 @@ static int mtk_cpufreq_set_target(struct cpufreq_policy *policy,
 	return 0;
 }
 
+#define DYNAMIC_POWER "dynamic-power-coefficient"
+
 static void mtk_cpufreq_ready(struct cpufreq_policy *policy)
 {
 	struct mtk_cpu_dvfs_info *info = policy->driver_data;
 	struct device_node *np = of_node_get(info->cpu_dev->of_node);
+	u32 capacitance = 0;
 
 	if (WARN_ON(!np))
 		return;
 
 	if (of_find_property(np, "#cooling-cells", NULL)) {
-		info->cdev = of_cpufreq_cooling_register(np,
-							 policy->related_cpus);
+		of_property_read_u32(np, DYNAMIC_POWER, &capacitance);
+
+		info->cdev = of_cpufreq_power_cooling_register(np,
+						policy->related_cpus,
+						capacitance,
+						NULL);
 
 		if (IS_ERR(info->cdev)) {
 			dev_err(info->cpu_dev,
-- 
1.7.9.5

[PATCH v5 2/3] arm64: dts: mt8173: Add thermal zone node.

[Dawei Chien]

This adds thermal zone node to Mediatek MT8173 dtsi file.

Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
---
This patch is base on patchset:
https://lkml.org/lkml/2015/11/30/239
---
 arch/arm64/boot/dts/mediatek/mt8173.dtsi |   43 ++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
index fda805d..4114cee 100644
--- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
@@ -188,6 +188,49 @@
 		clock-output-names = "cpum_ck";
 	};
 
+	thermal-zones {
+		cpu_thermal: cpu_thermal {
+			polling-delay-passive = <1000>; /* milliseconds */
+			polling-delay = <1000>; /* milliseconds */
+
+			thermal-sensors = <&thermal 0>;
+			sustainable-power = <1500>; /* milliwatts */
+
+			trips {
+				threshold: trip-point@0 {
+					temperature = <68000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				target: trip-point@1 {
+					temperature = <85000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+
+				cpu_crit: cpu_crit@0 {
+					temperature = <115000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+
+			cooling-maps {
+				map@0 {
+					trip = <&target>;
+					cooling-device = <&cpu0 0 0>;
+					contribution = <1024>;
+				};
+				map@1 {
+					trip = <&target>;
+					cooling-device = <&cpu2 0 0>;
+					contribution = <2048>;
+				};
+			};
+		};
+	};
+
 	timer {
 		compatible = "arm,armv8-timer";
 		interrupt-parent = <&gic>;
-- 
1.7.9.5

Re: [PATCH v5 2/3] arm64: dts: mt8173: Add thermal zone node.

[Daniel Kurtz]

On Wed, Dec 16, 2015 at 11:59 AM, Dawei Chien <dawei.chien@mediatek.com> wrote:
>
> This adds thermal zone node to Mediatek MT8173 dtsi file.
>
> Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
> ---
> This patch is base on patchset:
> https://lkml.org/lkml/2015/11/30/239
> ---
>  arch/arm64/boot/dts/mediatek/mt8173.dtsi |   43 ++++++++++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> index fda805d..4114cee 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> @@ -188,6 +188,49 @@
>                 clock-output-names = "cpum_ck";
>         };
>
> +       thermal-zones {
> +               cpu_thermal: cpu_thermal {
> +                       polling-delay-passive = <1000>; /* milliseconds */
> +                       polling-delay = <1000>; /* milliseconds */
> +
> +                       thermal-sensors = <&thermal 0>;

This should be <&thermal> with the MTK temp sensor node in
https://lkml.org/lkml/2015/11/30/239 patch series.

-Dan

Re: [PATCH v5 2/3] arm64: dts: mt8173: Add thermal zone node.

[dawei chien]

On Wed, 2015-12-16 at 16:34 +0800, Daniel Kurtz wrote:
> On Wed, Dec 16, 2015 at 11:59 AM, Dawei Chien <dawei.chien@mediatek.com> wrote:
> >
> > This adds thermal zone node to Mediatek MT8173 dtsi file.
> >
> > Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
> > ---
> > This patch is base on patchset:
> > https://lkml.org/lkml/2015/11/30/239
> > ---
> >  arch/arm64/boot/dts/mediatek/mt8173.dtsi |   43 ++++++++++++++++++++++++++++++
> >  1 file changed, 43 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> > index fda805d..4114cee 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> > @@ -188,6 +188,49 @@
> >                 clock-output-names = "cpum_ck";
> >         };
> >
> > +       thermal-zones {
> > +               cpu_thermal: cpu_thermal {
> > +                       polling-delay-passive = <1000>; /* milliseconds */
> > +                       polling-delay = <1000>; /* milliseconds */
> > +
> > +                       thermal-sensors = <&thermal 0>;
> 
> This should be <&thermal> with the MTK temp sensor node in
> https://lkml.org/lkml/2015/11/30/239 patch series.
> 
> -Dan

Hi Dan,
Sascha's thermal driver V12 only register sensor id as 0, so we need to
register sensor id as 0 to device tree as well.

Either <&thermal 0> or <&thermal>, sensor id should be 0 for two cases.
I try this two case, function all work fine for two cases. May I have
any misunderstand? Please kindly give your comment.
I will re-send this patch again once you tell me the reason, thank you.

BR,
Dawei

Re: [PATCH v5 2/3] arm64: dts: mt8173: Add thermal zone node.

[Daniel Kurtz]

On Wed, Dec 16, 2015 at 6:09 PM, dawei chien <dawei.chien@mediatek.com> wrote:
> On Wed, 2015-12-16 at 16:34 +0800, Daniel Kurtz wrote:
>> On Wed, Dec 16, 2015 at 11:59 AM, Dawei Chien <dawei.chien@mediatek.com> wrote:
>> >
>> > This adds thermal zone node to Mediatek MT8173 dtsi file.
>> >
>> > Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
>> > ---
>> > This patch is base on patchset:
>> > https://lkml.org/lkml/2015/11/30/239
>> > ---
>> >  arch/arm64/boot/dts/mediatek/mt8173.dtsi |   43 ++++++++++++++++++++++++++++++
>> >  1 file changed, 43 insertions(+)
>> >
>> > diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
>> > index fda805d..4114cee 100644
>> > --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
>> > +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
>> > @@ -188,6 +188,49 @@
>> >                 clock-output-names = "cpum_ck";
>> >         };
>> >
>> > +       thermal-zones {
>> > +               cpu_thermal: cpu_thermal {
>> > +                       polling-delay-passive = <1000>; /* milliseconds */
>> > +                       polling-delay = <1000>; /* milliseconds */
>> > +
>> > +                       thermal-sensors = <&thermal 0>;
>>
>> This should be <&thermal> with the MTK temp sensor node in
>> https://lkml.org/lkml/2015/11/30/239 patch series.
>>
>> -Dan
>
> Hi Dan,
> Sascha's thermal driver V12 only register sensor id as 0, so we need to
> register sensor id as 0 to device tree as well.
>
> Either <&thermal 0> or <&thermal>, sensor id should be 0 for two cases.
> I try this two case, function all work fine for two cases. May I have
> any misunderstand? Please kindly give your comment.
> I will re-send this patch again once you tell me the reason, thank you.

In the new patchset, Sascha changed it to:
#thermal-sensor-cells = <0>;

Which means the <&thermal> phandle no longer has any arguments.

Thanks!
-Dan

Re: [PATCH v5 2/3] arm64: dts: mt8173: Add thermal zone node.

[dawei chien]

On Wed, 2015-12-16 at 19:22 +0800, Daniel Kurtz wrote:
> On Wed, Dec 16, 2015 at 6:09 PM, dawei chien <dawei.chien@mediatek.com> wrote:
> > On Wed, 2015-12-16 at 16:34 +0800, Daniel Kurtz wrote:
> >> On Wed, Dec 16, 2015 at 11:59 AM, Dawei Chien <dawei.chien@mediatek.com> wrote:
> >> >
> >> > This adds thermal zone node to Mediatek MT8173 dtsi file.
> >> >
> >> > Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
> >> > ---
> >> > This patch is base on patchset:
> >> > https://lkml.org/lkml/2015/11/30/239
> >> > ---
> >> >  arch/arm64/boot/dts/mediatek/mt8173.dtsi |   43 ++++++++++++++++++++++++++++++
> >> >  1 file changed, 43 insertions(+)
> >> >
> >> > diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> >> > index fda805d..4114cee 100644
> >> > --- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> >> > +++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> >> > @@ -188,6 +188,49 @@
> >> >                 clock-output-names = "cpum_ck";
> >> >         };
> >> >
> >> > +       thermal-zones {
> >> > +               cpu_thermal: cpu_thermal {
> >> > +                       polling-delay-passive = <1000>; /* milliseconds */
> >> > +                       polling-delay = <1000>; /* milliseconds */
> >> > +
> >> > +                       thermal-sensors = <&thermal 0>;
> >>
> >> This should be <&thermal> with the MTK temp sensor node in
> >> https://lkml.org/lkml/2015/11/30/239 patch series.
> >>
> >> -Dan
> >
> > Hi Dan,
> > Sascha's thermal driver V12 only register sensor id as 0, so we need to
> > register sensor id as 0 to device tree as well.
> >
> > Either <&thermal 0> or <&thermal>, sensor id should be 0 for two cases.
> > I try this two case, function all work fine for two cases. May I have
> > any misunderstand? Please kindly give your comment.
> > I will re-send this patch again once you tell me the reason, thank you.
> 
> In the new patchset, Sascha changed it to:
> #thermal-sensor-cells = <0>;
> 
> Which means the <&thermal> phandle no longer has any arguments.
> 
> Thanks!
> -Dan
Hi Dan,
Thank you for your comment. Yes, I don't need to add sensor id since new
driver add thermal-sensor-cell as 0.
(Even I checked function OK to this patch with new patchset)

I will re-send this patch soon, thank you.

BR,
Dawei

[PATCH v5 3/3] arm64: dts: mt8173: Add dynamic power node.

[Dawei Chien]

This device node is for calculating dynamic power in mW.
Since mt8173 has two clusters, there are two dynamic power
coefficient as well.

Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
---
This patch is base on patchset:
https://lkml.org/lkml/2015/11/17/251
---
 arch/arm64/boot/dts/mediatek/mt8173.dtsi |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8173.dtsi b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
index 4114cee..33fabe4 100644
--- a/arch/arm64/boot/dts/mediatek/mt8173.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8173.dtsi
@@ -71,6 +71,7 @@
 			#cooling-cells = <2>;
 			#cooling-min-level = <0>;
 			#cooling-max-level = <7>;
+			dynamic-power-coefficient = <263>;
 		};
 
 		cpu1: cpu@1 {
@@ -95,6 +96,7 @@
 			#cooling-cells = <2>;
 			#cooling-min-level = <0>;
 			#cooling-max-level = <7>;
+			dynamic-power-coefficient = <263>;
 		};
 
 		cpu2: cpu@100 {
@@ -119,6 +121,7 @@
 			#cooling-cells = <2>;
 			#cooling-min-level = <0>;
 			#cooling-max-level = <7>;
+			dynamic-power-coefficient = <530>;
 		};
 
 		cpu3: cpu@101 {
@@ -143,6 +146,7 @@
 			#cooling-cells = <2>;
 			#cooling-min-level = <0>;
 			#cooling-max-level = <7>;
+			dynamic-power-coefficient = <530>;
 		};
 
 		idle-states {
-- 
1.7.9.5

Re: [PATCH v5 0/3] thermal: mediatek: Add cpu dynamic power cooling model.

[Viresh Kumar]

On 16-12-15, 11:59, Dawei Chien wrote:
> Use Intelligent Power Allocation (IPA) technical to add dynamic power model
> for binding CPU thermal zone. The power allocator governor allocates power
> budget to control CPU temperature.
> 
> Power Allocator governor is able to keep SOC temperature within a defined
> temperature range to avoid SOC overheat and keep it's performance.
> mt8173-cpufreq.c need to register its' own power model with power allocator
> thermal governor, so that power allocator governor can allocates suitable
> power budget to control CPU temperature.
> 
> Binding document is refer to this patchset
> https://lkml.org/lkml/2015/11/30/239
> 
> Change since V4:
> 1. Remove unnecessary error-checking for mt8173-cpufreq.c
> 2. Initializing variable capacitance with 0

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh