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Message-Id: <20251220-tb16-hdmi-v1-2-18b1e20b396e@oldschoolsolutions.biz>
Date: Sat, 20 Dec 2025 18:47:10 +0100
From: Jens Glathe via B4 Relay <devnull+jens.glathe.oldschoolsolutions.biz@...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: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, Val Packett <val@...kett.cool>,
Jens Glathe <jens.glathe@...schoolsolutions.biz>
Subject: [PATCH 2/2] arm64: dts: qcom: x1p42100-lenovo-thinkbook-16: add
hdmi bridge with enable pin
From: Jens Glathe <jens.glathe@...schoolsolutions.biz>
Add TLMM 119 for hdmi bridge enable. AeoB has this gpio.
In general this is the same setup as on the T14s. Since its using simple-bridge
and also is Lenovo, we also use the same realtek,rtd2171 compatible.
The real chip identity is not known yet. The bridge is wired with un-swapped
lanes, though.
As for gpio119 being used twice: It doesn't work if you don't, so it may be a case
of TLMM multiplexing hpd for both ports.
Signed-off-by: Jens Glathe <jens.glathe@...schoolsolutions.biz>
---
.../boot/dts/qcom/x1p42100-lenovo-thinkbook-16.dts | 88 ++++++++++++++++++++++
1 file changed, 88 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/x1p42100-lenovo-thinkbook-16.dts b/arch/arm64/boot/dts/qcom/x1p42100-lenovo-thinkbook-16.dts
index b505a4cbb4350a962bbf779ec788265c7583bf20..80172f3059a42c8656eb682682495194015d3bbc 100644
--- a/arch/arm64/boot/dts/qcom/x1p42100-lenovo-thinkbook-16.dts
+++ b/arch/arm64/boot/dts/qcom/x1p42100-lenovo-thinkbook-16.dts
@@ -78,6 +78,47 @@ camera {
vdd-supply = <&vreg_cam_5p0>;
};
+ hdmi-bridge {
+ compatible = "realtek,rtd2171";
+
+ enable-gpios = <&tlmm 119 GPIO_ACTIVE_HIGH>;
+
+ pinctrl-0 = <&hdmi_hpd_default>;
+ pinctrl-names = "default";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ hdmi_bridge_dp_in: endpoint {
+ remote-endpoint = <&usb_1_ss2_qmpphy_out_dp>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ hdmi_bridge_tmds_out: endpoint {
+ remote-endpoint = <&hdmi_con>;
+ };
+ };
+ };
+ };
+
+ hdmi-connector {
+ compatible = "hdmi-connector";
+ type = "a";
+
+ port {
+ hdmi_con: endpoint {
+ remote-endpoint = <&hdmi_bridge_tmds_out>;
+ };
+ };
+ };
+
gpio-keys {
compatible = "gpio-keys";
@@ -1038,6 +1079,14 @@ &mdss_dp1_out {
link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
};
+&mdss_dp2 {
+ status = "okay";
+};
+
+&mdss_dp2_out {
+ link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
+};
+
&mdss_dp3 {
/delete-property/ #sound-dai-cells;
@@ -1327,6 +1376,19 @@ hall_int_n_default: hall-int-n-state {
bias-disable;
};
+ hdmi_bridge_en: hdmi-bridge-en-state {
+ pins = "gpio119";
+ function = "gpio";
+ drive-strength = <16>;
+ bias-disable;
+ };
+
+ hdmi_hpd_default: hdmi-hpd-default-state {
+ pins = "gpio126";
+ function = "usb2_dp";
+ bias-disable;
+ };
+
kybd_default: kybd-default-state {
pins = "gpio67";
function = "gpio";
@@ -1585,6 +1647,32 @@ &usb_1_ss2_hsphy {
status = "okay";
};
+&usb_1_ss2_qmpphy {
+ vdda-phy-supply = <&vreg_l2j_1p2>;
+ vdda-pll-supply = <&vreg_l2d_0p9>;
+
+ /delete-property/ mode-switch;
+ /delete-property/ orientation-switch;
+
+ status = "okay";
+
+ ports {
+ port@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ /delete-node/ endpoint;
+
+ usb_1_ss2_qmpphy_out_dp: endpoint@0 {
+ reg = <0>;
+
+ data-lanes = <0 1 2 3>;
+ remote-endpoint = <&hdmi_bridge_dp_in>;
+ };
+ };
+ };
+};
+
&usb_2 {
status = "okay";
};
--
2.51.0
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