arm: dts: qcom: sm845: Set the compatible string for the GPU SMMU

Set the qcom,adreno-smmu compatible string for the GPU SMMU to enable
split pagetables and per-instance pagetables for drm/msm.
Signed-off-by: NJordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: NRob Clark <robdclark@chromium.org>
Reviewed-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20201109184728.2463097-5-jcrouse@codeaurora.orgSigned-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi

@@ -633,6 +633,15 @@ ap_ts_i2c: &i2c14 {
 	status = "okay";
 };
 
+/*
+ * Cheza fw does not properly program the GPU aperture to allow the
+ * GPU to update the SMMU pagetables for context switches.  Work
+ * around this by dropping the "qcom,adreno-smmu" compat string.
+ */
+&adreno_smmu {
+	compatible = "qcom,sdm845-smmu-v2", "qcom,smmu-v2";
+};
+
 &mss_pil {
 	iommus = <&apps_smmu 0x781 0x0>,
 		 <&apps_smmu 0x724 0x3>;

arch/arm64/boot/dts/qcom/sdm845.dtsi

@@ -4106,7 +4106,7 @@
 		};
 
 		adreno_smmu: iommu@5040000 {
-			compatible = "qcom,sdm845-smmu-v2", "qcom,smmu-v2";
+			compatible = "qcom,sdm845-smmu-v2", "qcom,adreno-smmu", "qcom,smmu-v2";
 			reg = <0 0x5040000 0 0x10000>;
 			#iommu-cells = <1>;
 			#global-interrupts = <2>;