From: Jens Glathe <jens.glathe@oldschoolsolutions.biz>

Add TLMM 120 for hdmi bridge enable.
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.

Signed-off-by: Jens Glathe <jens.glathe@oldschoolsolutions.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 b4a40904f0a01b36ff2fc72e801a5fe7d6971e2a..1e5eb8c5dc988c3c4655f0019e53fc19e0884e4e 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 120 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 = "gpio120";
+		function = "gpio";
+		drive-strength = <16>;
+		bias-pull-down;
+	};
+
+	hdmi_hpd_default: hdmi-hpd-default-state {
+		pins = "gpio126";
+		function = "usb2_dp";
+		bias-disable;
+	};
+
 	kybd_default: kybd-default-state {
 		pins = "gpio67";
 		function = "gpio";
@@ -1573,6 +1635,32 @@ &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

On 1/3/26 10:00 AM, Jens Glathe via B4 Relay wrote:
> From: Jens Glathe <jens.glathe@oldschoolsolutions.biz>
> 
> Add TLMM 120 for hdmi bridge enable.
> 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.
> 
> Signed-off-by: Jens Glathe <jens.glathe@oldschoolsolutions.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 b4a40904f0a01b36ff2fc72e801a5fe7d6971e2a..1e5eb8c5dc988c3c4655f0019e53fc19e0884e4e 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";

Since we're not sure, a comment to draw attention to it would be neat

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad