[PATCH v2 4/6] arm64: dts: qcom: lemans: Add GEM_NOC interconnect for adreno SMMU
From: Bibek Kumar Patro
Date: Tue May 26 2026 - 10:49:46 EST
On Lemans platforms, the Adreno SMMU requires a bandwidth vote on
the GEM_NOC path (MASTER_GPU_TCU -> SLAVE_EBI1) before its registers
are accessible. Without this vote, the SMMU may become unreachable,
leading to intermittent probe failures and runtime issues.
Add the required interconnect to ensure reliable register access.
Signed-off-by: Bibek Kumar Patro <bibek.patro@xxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/lemans.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/lemans.dtsi b/arch/arm64/boot/dts/qcom/lemans.dtsi
index 522ba43836a2425a8612506f5f7113f291f34706..ac9f529d2719105609d997874a6319c7d04e1655 100644
--- a/arch/arm64/boot/dts/qcom/lemans.dtsi
+++ b/arch/arm64/boot/dts/qcom/lemans.dtsi
@@ -4796,6 +4796,8 @@ adreno_smmu: iommu@3da0000 {
<GIC_SPI 685 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 686 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 687 IRQ_TYPE_LEVEL_HIGH>;
+ interconnects = <&gem_noc MASTER_GPU_TCU QCOM_ICC_TAG_ALWAYS
+ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>;
};
serdes0: phy@8901000 {
--
2.34.1