linux-kernel - [PATCH] arm64: dts: qcom: x1e: bus is 40-bits (fix 64GB models)

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Message-ID: <20251127212943.24480-1-jonathan@marek.ca>
Date: Thu, 27 Nov 2025 16:29:42 -0500
From: Jonathan Marek <jonathan@...ek.ca>
To: linux-arm-msm@...r.kernel.org
Cc: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Sibi Sankar <sibi.sankar@....qualcomm.com>,
	Abel Vesa <abel.vesa@...aro.org>,
	Rajendra Nayak <quic_rjendra@...cinc.com>,
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] arm64: dts: qcom: x1e: bus is 40-bits (fix 64GB models)

Unlike the phone SoCs this was copied from, x1e has a 40-bit physical bus.
The upper address space is used to support more than 32GB of memory.

This fixes issues when DMA buffers are allocated outside the 36-bit range.

Fixes: af16b00578a7 ("arm64: dts: qcom: Add base X1E80100 dtsi and the QCP dts")
Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
---
 arch/arm64/boot/dts/qcom/x1e80100.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100.dtsi b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
index cff34d1c74b60..cd34ce5dfd63a 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
@@ -792,8 +792,8 @@ soc: soc@0 {
 
 		#address-cells = <2>;
 		#size-cells = <2>;
-		dma-ranges = <0 0 0 0 0x10 0>;
-		ranges = <0 0 0 0 0x10 0>;
+		dma-ranges = <0 0 0 0 0x100 0>;
+		ranges = <0 0 0 0 0x100 0>;
 
 		gcc: clock-controller@...000 {
 			compatible = "qcom,x1e80100-gcc";
-- 
2.51.0