arm64: dts: qcom: msm8998: Configure Adreno GPU and related IOMMU

The MSM8998 SoC includes an Adreno 540.1 GPU, with a maximum frequency
of 710MHz. This GPU may or may not accept a ZAP shader, depending on
platform configuration, so adding a zap-shader node is left to the
board DT.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210901183123.1087392-5-angelogioacchino.delregno@somainline.org

arch/arm64/boot/dts/qcom/msm8998.dtsi

@@ -1424,6 +1424,103 @@ glink-edge {
 			};
 		};
 
+		adreno_gpu: gpu@5000000 {
+			compatible = "qcom,adreno-540.1", "qcom,adreno";
+			reg = <0x05000000 0x40000>;
+			reg-names = "kgsl_3d0_reg_memory";
+
+			clocks = <&gcc GCC_GPU_CFG_AHB_CLK>,
+				<&gpucc RBBMTIMER_CLK>,
+				<&gcc GCC_BIMC_GFX_CLK>,
+				<&gcc GCC_GPU_BIMC_GFX_CLK>,
+				<&gpucc RBCPR_CLK>,
+				<&gpucc GFX3D_CLK>;
+			clock-names = "iface",
+				"rbbmtimer",
+				"mem",
+				"mem_iface",
+				"rbcpr",
+				"core";
+
+			interrupts = <0 300 IRQ_TYPE_LEVEL_HIGH>;
+			iommus = <&adreno_smmu 0>;
+			operating-points-v2 = <&gpu_opp_table>;
+			power-domains = <&rpmpd MSM8998_VDDMX>;
+			#stream-id-cells = <16>;
+			status = "disabled";
+
+			gpu_opp_table: opp-table {
+				compatible  = "operating-points-v2";
+				opp-710000097 {
+					opp-hz = /bits/ 64 <710000097>;
+					opp-level = <RPM_SMD_LEVEL_TURBO>;
+					opp-supported-hw = <0xFF>;
+				};
+
+				opp-670000048 {
+					opp-hz = /bits/ 64 <670000048>;
+					opp-level = <RPM_SMD_LEVEL_NOM_PLUS>;
+					opp-supported-hw = <0xFF>;
+				};
+
+				opp-596000097 {
+					opp-hz = /bits/ 64 <596000097>;
+					opp-level = <RPM_SMD_LEVEL_NOM>;
+					opp-supported-hw = <0xFF>;
+				};
+
+				opp-515000097 {
+					opp-hz = /bits/ 64 <515000097>;
+					opp-level = <RPM_SMD_LEVEL_SVS_PLUS>;
+					opp-supported-hw = <0xFF>;
+				};
+
+				opp-414000000 {
+					opp-hz = /bits/ 64 <414000000>;
+					opp-level = <RPM_SMD_LEVEL_SVS>;
+					opp-supported-hw = <0xFF>;
+				};
+
+				opp-342000000 {
+					opp-hz = /bits/ 64 <342000000>;
+					opp-level = <RPM_SMD_LEVEL_LOW_SVS>;
+					opp-supported-hw = <0xFF>;
+				};
+
+				opp-257000000 {
+					opp-hz = /bits/ 64 <257000000>;
+					opp-level = <RPM_SMD_LEVEL_MIN_SVS>;
+					opp-supported-hw = <0xFF>;
+				};
+			};
+		};
+
+		adreno_smmu: iommu@5040000 {
+			compatible = "qcom,msm8998-smmu-v2", "qcom,smmu-v2";
+			reg = <0x05040000 0x10000>;
+			clocks = <&gcc GCC_GPU_CFG_AHB_CLK>,
+				 <&gcc GCC_BIMC_GFX_CLK>,
+				 <&gcc GCC_GPU_BIMC_GFX_CLK>;
+			clock-names = "iface", "mem", "mem_iface";
+
+			#global-interrupts = <0>;
+			#iommu-cells = <1>;
+			interrupts =
+				<GIC_SPI 329 IRQ_TYPE_LEVEL_HIGH>,
+				<GIC_SPI 330 IRQ_TYPE_LEVEL_HIGH>,
+				<GIC_SPI 331 IRQ_TYPE_LEVEL_HIGH>;
+			/*
+			 * GPU-GX GDSC's parent is GPU-CX. We need to bring up the
+			 * GPU-CX for SMMU but we need both of them up for Adreno.
+			 * Contemporarily, we also need to manage the VDDMX rpmpd
+			 * domain in the Adreno driver.
+			 * Enable GPU CX/GX GDSCs here so that we can manage the
+			 * SoC VDDMX RPM Power Domain in the Adreno driver.
+			 */
+			power-domains = <&gpucc GPU_GX_GDSC>;
+			status = "disabled";
+		};
+
 		gpucc: clock-controller@5065000 {
 			compatible = "qcom,msm8998-gpucc";
 			#clock-cells = <1>;