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

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Date:   Tue, 13 Dec 2022 01:24:23 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org, krzysztof.kozlowski@...aro.org
Cc:     marijn.suijten@...ainline.org,
        Konrad Dybcio <konrad.dybcio@...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: [PATCH 7/7] arm64: dts: qcom: sm8250: Add GPU speedbin support

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>
---
 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