linux-kernel - Re: [PATCH 7/7] arm64: dts: qcom: sm8250: Add GPU speedbin support

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Date:   Thu, 15 Dec 2022 23:36:54 +0100
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org, krzysztof.kozlowski@...aro.org,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/7] arm64: dts: qcom: sm8250: Add GPU speedbin support

On 2022-12-13 01:24:23, Konrad Dybcio wrote:
> SM8250 has (at least) four GPU speed bins. With the support added on the
> driver side, wire up bin detection in the DTS to restrict lower-quality
> SKUs from running at frequencies they were not validated at.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Tested-by: Marijn Suijten <marijn.suijten@...ainline.org> # On Sony Xperia 5 II (speed bin 0x7)
Reviewed-by: Marijn Suijten <marijn.suijten@...ainline.org>

> ---
>  arch/arm64/boot/dts/qcom/sm8250.dtsi | 23 ++++++++++++++++++++++-
>  1 file changed, 22 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi
> index c008f49b5852..0c4ecdab1244 100644
> --- a/arch/arm64/boot/dts/qcom/sm8250.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi
> @@ -955,6 +955,18 @@ ipcc: mailbox@...000 {
>  			#mbox-cells = <2>;
>  		};
>  
> +		qfprom: efuse@...000 {
> +			compatible = "qcom,sm8250-qfprom", "qcom,qfprom";
> +			reg = <0 0x00784000 0 0x8ff>;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +
> +			gpu_speed_bin: gpu_speed_bin@19b {
> +				reg = <0x19b 0x1>;
> +				bits = <5 3>;
> +			};
> +		};
> +
>  		rng: rng@...000 {
>  			compatible = "qcom,prng-ee";
>  			reg = <0 0x00793000 0 0x1000>;
> @@ -2563,49 +2575,58 @@ gpu: gpu@...0000 {
>  
>  			qcom,gmu = <&gmu>;
>  
> +			nvmem-cells = <&gpu_speed_bin>;
> +			nvmem-cell-names = "speed_bin";
> +
>  			status = "disabled";
>  
>  			zap-shader {
>  				memory-region = <&gpu_mem>;
>  			};
>  
> -			/* note: downstream checks gpu binning for 670 Mhz */
>  			gpu_opp_table: opp-table {
>  				compatible = "operating-points-v2";
>  
>  				opp-670000000 {
>  					opp-hz = /bits/ 64 <670000000>;
>  					opp-level = <RPMH_REGULATOR_LEVEL_NOM_L1>;
> +					opp-supported-hw = <0x6>;
>  				};
>  
>  				opp-587000000 {
>  					opp-hz = /bits/ 64 <587000000>;
>  					opp-level = <RPMH_REGULATOR_LEVEL_NOM>;
> +					opp-supported-hw = <0x7>;
>  				};
>  
>  				opp-525000000 {
>  					opp-hz = /bits/ 64 <525000000>;
>  					opp-level = <RPMH_REGULATOR_LEVEL_SVS_L2>;
> +					opp-supported-hw = <0xf>;
>  				};
>  
>  				opp-490000000 {
>  					opp-hz = /bits/ 64 <490000000>;
>  					opp-level = <RPMH_REGULATOR_LEVEL_SVS_L1>;
> +					opp-supported-hw = <0xf>;
>  				};
>  
>  				opp-441600000 {
>  					opp-hz = /bits/ 64 <441600000>;
>  					opp-level = <RPMH_REGULATOR_LEVEL_SVS_L0>;
> +					opp-supported-hw = <0xf>;
>  				};
>  
>  				opp-400000000 {
>  					opp-hz = /bits/ 64 <400000000>;
>  					opp-level = <RPMH_REGULATOR_LEVEL_SVS>;
> +					opp-supported-hw = <0xf>;
>  				};
>  
>  				opp-305000000 {
>  					opp-hz = /bits/ 64 <305000000>;
>  					opp-level = <RPMH_REGULATOR_LEVEL_LOW_SVS>;
> +					opp-supported-hw = <0xf>;
>  				};
>  			};
>  		};
> -- 
> 2.39.0
>