The SMMUs on sc7280 are cache-coherent. APPS_SMMU is marked as such,
mark the GPU one as well.

Fixes: 96c471970b7b ("arm64: dts: qcom: sc7280: Add gpu support")
Reviewed-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
 arch/arm64/boot/dts/qcom/sc7280.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
index db47af668232..6964c14ffce5 100644
--- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
@@ -2787,6 +2787,7 @@ adreno_smmu: iommu@3da0000 {
 					"gpu_cc_hub_aon_clk";
 
 			power-domains = <&gpucc GPU_CC_CX_GDSC>;
+			dma-coherent;
 		};
 
 		remoteproc_mpss: remoteproc@4080000 {

-- 
2.42.1