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From:   Jordan Crouse <jcrouse@codeaurora.org>
To:     linux-arm-msm@vger.kernel.org
Cc:     Rob Clark <robdclark@chromium.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Andy Gross <agross@kernel.org>,
        Rob Herring <robh+dt@kernel.org>, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH v18 4/4] arm: dts: qcom: sm845: Set the compatible string for the GPU SMMU
Date:   Tue, 27 Oct 2020 16:34:08 -0600
Message-Id: <20201027223408.469893-5-jcrouse@codeaurora.org>
In-Reply-To: <20201027223408.469893-1-jcrouse@codeaurora.org>
References: <20201027223408.469893-1-jcrouse@codeaurora.org>
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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@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---

 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 40e8c11f23ab..0508e86140bd 100644
--- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
@@ -4103,7 +4103,7 @@ 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>;
-- 
2.25.1