linux-kernel - [PATCH] arm64: tegra: smaug: Enable DisplayPort via USB-C port

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Message-Id: <20251226-smaug-typec_dp-v1-1-7eabcd59da4c@tecnico.ulisboa.pt>
Date: Fri, 26 Dec 2025 12:17:32 +0000
From: Diogo Ivo <diogo.ivo@...nico.ulisboa.pt>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Jonathan Hunter <jonathanh@...dia.com>
Cc: devicetree@...r.kernel.org, linux-tegra@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Diogo Ivo <diogo.ivo@...nico.ulisboa.pt>
Subject: [PATCH] arm64: tegra: smaug: Enable DisplayPort via USB-C port

Enable both SOR and DPAUX modules allowing the USB-C port to transmit
video in DP altmode. Tested on several monitors with USB-C to HDMI
adapter.

Signed-off-by: Diogo Ivo <diogo.ivo@...nico.ulisboa.pt>
---
 arch/arm64/boot/dts/nvidia/tegra210-smaug.dts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
index 49bf23d6f593..b88428aa831e 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra210-smaug.dts
@@ -31,6 +31,11 @@ memory@...00000 {
 	};
 
 	host1x@...00000 {
+		dpaux1: dpaux@...40000 {
+			vdd-supply = <&pp3300>;
+			status = "okay";
+		};
+
 		dsia: dsi@...00000 {
 			avdd-dsi-csi-supply = <&vdd_dsi_csi>;
 			status = "okay";
@@ -58,6 +63,13 @@ link1: panel@0 {
 			};
 		};
 
+		sor1: sor@...80000 {
+			avdd-io-hdmi-dp-supply = <&pp1800>;
+			vdd-hdmi-dp-pll-supply = <&avddio_1v05>;
+			nvidia,dpaux = <&dpaux1>;
+			status = "okay";
+		};
+
 		dpaux: dpaux@...c0000 {
 			status = "okay";
 		};

---
base-commit: c100317dc8c40c71bfb572353d87ca1735d39fd5
change-id: 20251226-smaug-typec_dp-197201aaadae

Best regards,
-- 
Diogo Ivo <diogo.ivo@...nico.ulisboa.pt>