linux-kernel - [PATCH] arm64: dts: qcom: x1e80100: Describe the full 'link' region of DP hosts

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Message-Id: <20251009-topic-hamoa_dp_reg-v1-1-4c70afa5f029@oss.qualcomm.com>
Date: Thu, 09 Oct 2025 14:59:18 +0200
From: Konrad Dybcio <konradybcio@...nel.org>
To: 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>, 
 Rajendra Nayak <quic_rjendra@...cinc.com>, Abel Vesa <abel.vesa@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: [PATCH] arm64: dts: qcom: x1e80100: Describe the full 'link'
 region of DP hosts

From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

The regions are larger than currently described. Rather inconveniently,
some control registers, including some related to USB4, are in that
left-out chunk.

Extend it to cover the entire region, as per the hw specification.

Fixes: 1940c25eaa63 ("arm64: dts: qcom: x1e80100: Add display nodes")
Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/x1e80100.dtsi | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100.dtsi b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
index 51576d9c935d..ccd7f9975dac 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
@@ -5466,7 +5466,7 @@ mdss_dp0: displayport-controller@...0000 {
 				compatible = "qcom,x1e80100-dp";
 				reg = <0 0x0ae90000 0 0x200>,
 				      <0 0x0ae90200 0 0x200>,
-				      <0 0x0ae90400 0 0x600>,
+				      <0 0x0ae90400 0 0xc00>,
 				      <0 0x0ae91000 0 0x400>,
 				      <0 0x0ae91400 0 0x400>;
 
@@ -5554,7 +5554,7 @@ mdss_dp1: displayport-controller@...8000 {
 				compatible = "qcom,x1e80100-dp";
 				reg = <0 0x0ae98000 0 0x200>,
 				      <0 0x0ae98200 0 0x200>,
-				      <0 0x0ae98400 0 0x600>,
+				      <0 0x0ae98400 0 0xc00>,
 				      <0 0x0ae99000 0 0x400>,
 				      <0 0x0ae99400 0 0x400>;
 
@@ -5642,7 +5642,7 @@ mdss_dp2: displayport-controller@...a000 {
 				compatible = "qcom,x1e80100-dp";
 				reg = <0 0x0ae9a000 0 0x200>,
 				      <0 0x0ae9a200 0 0x200>,
-				      <0 0x0ae9a400 0 0x600>,
+				      <0 0x0ae9a400 0 0xc00>,
 				      <0 0x0ae9b000 0 0x400>,
 				      <0 0x0ae9b400 0 0x400>;
 
@@ -5729,7 +5729,7 @@ mdss_dp3: displayport-controller@...0000 {
 				compatible = "qcom,x1e80100-dp";
 				reg = <0 0x0aea0000 0 0x200>,
 				      <0 0x0aea0200 0 0x200>,
-				      <0 0x0aea0400 0 0x600>,
+				      <0 0x0aea0400 0 0xc00>,
 				      <0 0x0aea1000 0 0x400>,
 				      <0 0x0aea1400 0 0x400>;
 

---
base-commit: 0b2f041c47acb45db82b4e847af6e17eb66cd32d
change-id: 20251009-topic-hamoa_dp_reg-5dac7055e21b

Best regards,
-- 
Konrad Dybcio <konrad.dybcio@....qualcomm.com>