[PATCH v17 19/20] arm: dts: qcom: sm845: Set the compatible string for the GPU SMMU

[Rob Clark]

From: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>

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: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
---
 arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi | 9 +++++++++
 arch/arm64/boot/dts/qcom/sdm845.dtsi       | 2 +-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
index 64fc1bfd66fa..39f23cdcbd02 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
@@ -633,6 +633,15 @@ &mdss_mdp {
 	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>;
diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
index 2884577dcb77..76a8a34640ae 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -4058,7 +4058,7 @@ opp-257000000 {
 		};
 
 		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>;
-- 
2.26.2