Re: [PATCH 6/8] arm64: dts: qcom: kaanapali: Add GPU cooling

[Gaurav Kohli <gaurav.kohli@oss.qualcomm.com>]

On 5/13/2026 11:23 PM, Dmitry Baryshkov wrote:
> On Tue, May 12, 2026 at 03:53:20AM +0530, Akhil P Oommen wrote:
>> From: Gaurav Kohli <gaurav.kohli@oss.qualcomm.com>
>>
>> Unlike the CPU, the GPU does not throttle its speed automatically when it
>> reaches high temperatures.
>>
>> Set up GPU cooling by throttling the GPU speed
>> when reaching 105°C.
>>
>> Signed-off-by: Gaurav Kohli <gaurav.kohli@oss.qualcomm.com>
>> Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
>> ---
>>   arch/arm64/boot/dts/qcom/kaanapali.dtsi | 165 ++++++++++++++++++++++++++------
>>   1 file changed, 135 insertions(+), 30 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/kaanapali.dtsi b/arch/arm64/boot/dts/qcom/kaanapali.dtsi
>> index c57aea44218e..5089416ec32c 100644
>> --- a/arch/arm64/boot/dts/qcom/kaanapali.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/kaanapali.dtsi
>> @@ -26,6 +26,7 @@
>>   #include <dt-bindings/soc/qcom,gpr.h>
>>   #include <dt-bindings/soc/qcom,rpmh-rsc.h>
>>   #include <dt-bindings/sound/qcom,q6dsp-lpass-ports.h>
>> +#include <dt-bindings/thermal/thermal.h>
>>   
>>   #include "kaanapali-ipcc.h"
>>   
>> @@ -7045,13 +7046,15 @@ nsphmx-3-critical {
>>   		};
>>   
>>   		gpuss-0-thermal {
>> +			polling-delay-passive = <200>;
> 
> Other DT files use 10 for GPU thermal zones polling interval.
> 

Sure, let me update.

>> +
>>   			thermal-sensors = <&tsens5 0>;
>>   
>>   			trips {
>> -				gpuss-0-hot {
>> -					temperature = <120000>;
>> +				gpuss_0_alert0: gpuss-0-alert0 {
>> +					temperature = <105000>;
>>   					hysteresis = <5000>;
>> -					type = "hot";
>> +					type = "passive";
>>   				};
> 
> Why don't we keep both passive and hot trip points?
> 

Need guidance here, we are keeping passive at low temp so still hot trip 
is needed for such cases.

>>   
>>   				gpuss-0-critical {
>>
>