From: Konrad Dybcio <quic_kdybcio@quicinc.com>
Date: Wed, 18 Sep 2024 22:57:21 +0000 (+0200)
Subject: arm64: dts: qcom: sm8150: Affirm IDR0.CCTW on apps_smmu
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=05bd9923d15e8508cd0fa4f3d03437df1a9362aa;p=users%2Fjedix%2Flinux-maple.git

arm64: dts: qcom: sm8150: Affirm IDR0.CCTW on apps_smmu

On RPMh-based SoCs, the APPS SMMU advertizes support for cache-coherent
pagetable walk via the IDR0 register. This however is not respected by
the arm-smmu driver unless dma-coherent is set.

Mark the node as dma-coherent to ensure this (and other) implementations
take this coherency into account.

Signed-off-by: Konrad Dybcio <quic_kdybcio@quicinc.com>
Tested-by: Steev Klimaszewski <steev@kali.org> # Thinkpad X13s (sc8280xp)
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on sdm845-rb3
Link: https://lore.kernel.org/r/20240919-topic-apps_smmu_coherent-v1-8-5b3a8662403d@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
---

diff --git a/arch/arm64/boot/dts/qcom/sm8150.dtsi b/arch/arm64/boot/dts/qcom/sm8150.dtsi
index 27f87835bc55..28e57ad885f4 100644
--- a/arch/arm64/boot/dts/qcom/sm8150.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8150.dtsi
@@ -4296,6 +4296,7 @@
 				     <GIC_SPI 407 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 408 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 409 IRQ_TYPE_LEVEL_HIGH>;
+			dma-coherent;
 		};
 
 		remoteproc_adsp: remoteproc@17300000 {