Add support for Reset using GPUCC driver for GPU. This helps to ensure
that GPU state is reset by making sure that CX head switch is collapsed.

Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
---

(no changes since v1)

 arch/arm64/boot/dts/qcom/sc7280.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
index e66fc67..f5257d6 100644
--- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
@@ -2243,6 +2243,9 @@
 			nvmem-cells = <&gpu_speed_bin>;
 			nvmem-cell-names = "speed_bin";
 
+			resets = <&gpucc GPU_CX_COLLAPSE>;
+			reset-names = "cx_collapse";
+
 			gpu_opp_table: opp-table {
 				compatible = "operating-points-v2";
 
-- 
2.7.4

On 18/08/2022 23:18, Akhil P Oommen wrote:
> Add support for Reset using GPUCC driver for GPU. This helps to ensure
> that GPU state is reset by making sure that CX head switch is collapsed.
> 
> Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
> ---
> 
> (no changes since v1)
> 
>  arch/arm64/boot/dts/qcom/sc7280.dtsi | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index e66fc67..f5257d6 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -2243,6 +2243,9 @@
>  			nvmem-cells = <&gpu_speed_bin>;
>  			nvmem-cell-names = "speed_bin";
>  
> +			resets = <&gpucc GPU_CX_COLLAPSE>;
> +			reset-names = "cx_collapse";
> +

I think this is not allowed by bindings. Did you test your change with
dtbs_check?

Best regards,
Krzysztof

On 8/19/2022 11:47 AM, Krzysztof Kozlowski wrote:
> On 18/08/2022 23:18, Akhil P Oommen wrote:
>> Add support for Reset using GPUCC driver for GPU. This helps to ensure
>> that GPU state is reset by making sure that CX head switch is collapsed.
>>
>> Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
>> ---
>>
>> (no changes since v1)
>>
>>   arch/arm64/boot/dts/qcom/sc7280.dtsi | 3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> index e66fc67..f5257d6 100644
>> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
>> @@ -2243,6 +2243,9 @@
>>   			nvmem-cells = <&gpu_speed_bin>;
>>   			nvmem-cell-names = "speed_bin";
>>   
>> +			resets = <&gpucc GPU_CX_COLLAPSE>;
>> +			reset-names = "cx_collapse";
>> +
> I think this is not allowed by bindings. Did you test your change with
> dtbs_check?
>
> Best regards,
> Krzysztof
My bad! Thanks for pointing this out. Fixed in v4 with patch 5/6.

-Akhil.