linux-kernel - [PATCH] arm64: dts: qcom: x1e80100-romulus: Enable DP over Type-C

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Message-Id: <20250514-topic-romu_dp-v1-1-6242d6acb5e5@oss.qualcomm.com>
Date: Wed, 14 May 2025 19:47:16 +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>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>, 
 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-romulus: Enable DP over Type-C

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

Both ports seem to work, just like on other X1E laptops.

Tested with a Type-C-to-HDMI2.0 dock (translating into up to 2 DP lanes
worth of bandwidth).

Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
---
 .../boot/dts/qcom/x1e80100-microsoft-romulus.dtsi      | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi b/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
index 26ae19b34b37e0e3c67eb4543de898e94e62c678..0fd8516580b2679ee425438cb73fd4078cb20581 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
@@ -944,6 +944,24 @@ &mdss {
 	status = "okay";
 };
 
+&mdss_dp0 {
+	status = "okay";
+};
+
+&mdss_dp0_out {
+	data-lanes = <0 1>;
+	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
+};
+
+&mdss_dp1 {
+	status = "okay";
+};
+
+&mdss_dp1_out {
+	data-lanes = <0 1>;
+	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
+};
+
 &mdss_dp3 {
 	/delete-property/ #sound-dai-cells;
 

---
base-commit: edef457004774e598fc4c1b7d1d4f0bcd9d0bb30
change-id: 20250514-topic-romu_dp-10129c7b7cfa

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