[PATCH v4 0/2] Enable lt8713sx bridge with displayport for monaco-evk

[PATCH v4 0/2] Enable lt8713sx bridge with displayport for monaco-evk

[Vishnu Saini]

This series enables lt8713sx bridge and displayport on Qualcomm
monaco-evk platform.

Signed-off-by: Vishnu Saini <vishnu.saini@oss.qualcomm.com>
---
Changes in v4:
- Rebased on top of for-next branch.
- Renamed dp connector node and labels.
- Placed config as per savedefconfig
- Addressed review comments from: https://lore.kernel.org/r/20260317-lt8713sx_dt_for_next-v1-0-8195fa931ff1@oss.qualcomm.com
- Link to v3: https://lore.kernel.org/r/20251228-lt8713sx-bridge-linux-for-next-v3-0-3f77ad84d7d1@oss.qualcomm.com

Changes in v3:
- Used  existing qup_i2c0_data_clk as default i2c0 pinctrl and provided it's drive-strength, bias-pull-up.
- Link to v2: https://lore.kernel.org/r/20251219-lt8713sx-bridge-linux-for-next-v2-0-2e53f5490eb9@oss.qualcomm.com

Changes in v2:
- Configure DP PHY supplies and DP pinctrl
- Configure in/out ports and connectors for lt8713sx bridge
- Use correct base commit and fixed build issues 
- Link to v1: https://lore.kernel.org/r/20251120-lt8713sx-bridge-linux-for-next-v1-0-2246fc5fb490@qti.qualcomm.com

---
Vishnu Saini (2):
      arm64: dts: qcom: monaco-evk: add lt8713sx bridge with displayport
      arm64: defconfig: Enable Lontium LT8713sx driver

 arch/arm64/boot/dts/qcom/monaco-evk.dts | 89 +++++++++++++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/monaco.dtsi    |  6 +++
 arch/arm64/configs/defconfig            |  1 +
 3 files changed, 96 insertions(+)
---
base-commit: d639565b64d4781b3b36ff76b71ce1e68bda70c0
change-id: 20251120-lt8713sx-bridge-linux-for-next-30838c5a2719
prerequisite-message-id: <20260303-lt8713sx-bridge-driver-v5-0-6cc2a855aafa@oss.qualcomm.com>
prerequisite-patch-id: c5155e9804a0e30aba47c54471cf6870482d0738
prerequisite-patch-id: 44e87c690845b24fb4dd88bba67e89fcfd18048a

Best regards,
-- 
Vishnu Saini <vishnu.saini@oss.qualcomm.com>

[PATCH v4 1/2] arm64: dts: qcom: monaco-evk: add lt8713sx bridge with displayport

[Vishnu Saini]

Monaco-evk has LT8713sx which act as DP to 3 DP output
converter. Edp PHY from monaco soc is connected to lt8713sx
as input and output of lt8713sx is connected to 3 mini DP ports.

Two ports are available in mainboard and one port
is available on Mezz board.

lt8713sx is connected to soc over i2c0 and with reset gpio
connected to pin6 of ioexpander5.

Enable the edp nodes from monaco and enable lontium lt8713sx
bridge node.

Co-developed-by: Prahlad Valluru <vvalluru@qti.qualcomm.com>
Signed-off-by: Prahlad Valluru <vvalluru@qti.qualcomm.com>
Signed-off-by: Vishnu Saini <vishnu.saini@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/monaco-evk.dts | 89 +++++++++++++++++++++++++++++++++
 arch/arm64/boot/dts/qcom/monaco.dtsi    |  6 +++
 2 files changed, 95 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/monaco-evk.dts b/arch/arm64/boot/dts/qcom/monaco-evk.dts
index 0b26cc334a69..0a91e421edbd 100644
--- a/arch/arm64/boot/dts/qcom/monaco-evk.dts
+++ b/arch/arm64/boot/dts/qcom/monaco-evk.dts
@@ -52,6 +52,30 @@ dmic: audio-codec-0 {
 		num-channels = <1>;
 	};
 
+	dp-connector-0 {
+		compatible = "dp-connector";
+		label = "DP0";
+		type = "mini";
+
+		port {
+			dp0_connector_in: endpoint {
+				remote-endpoint = <&lt8713sx_dp0_out>;
+			};
+		};
+	};
+
+	dp-connector-1 {
+		compatible = "dp-connector";
+		label = "DP1";
+		type = "mini";
+
+		port {
+			dp1_connector_in: endpoint {
+				remote-endpoint = <&lt8713sx_dp1_out>;
+			};
+		};
+	};
+
 	max98357a: audio-codec-1 {
 		compatible = "maxim,max98357a";
 		#sound-dai-cells = <0>;
@@ -355,6 +379,42 @@ &gpu_zap_shader {
 	firmware-name = "qcom/qcs8300/a623_zap.mbn";
 };
 
+&i2c0 {
+	status = "okay";
+
+	bridge@4f {
+		compatible = "lontium,lt8713sx";
+		reg = <0x4f>;
+		reset-gpios = <&expander5 6 GPIO_ACTIVE_LOW>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				lt8713sx_dp_in: endpoint {
+					remote-endpoint = <&mdss_dp0_out>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				lt8713sx_dp0_out: endpoint {
+					remote-endpoint = <&dp0_connector_in>;
+				};
+			};
+
+			port@2 {
+				reg = <2>;
+				lt8713sx_dp1_out: endpoint {
+					remote-endpoint = <&dp1_connector_in>;
+				};
+			};
+		};
+	};
+};
+
 &i2c1 {
 	pinctrl-0 = <&qup_i2c1_default>;
 	pinctrl-names = "default";
@@ -483,6 +543,30 @@ &iris {
 	status = "okay";
 };
 
+&mdss {
+	status = "okay";
+};
+
+&mdss_dp0 {
+	pinctrl-0 = <&dp_hot_plug_det>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
+&mdss_dp0_out {
+	data-lanes = <0 1 2 3>;
+	link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
+	remote-endpoint = <&lt8713sx_dp_in>;
+};
+
+&mdss_dp0_phy {
+	vdda-phy-supply = <&vreg_l5a>;
+	vdda-pll-supply = <&vreg_l4a>;
+
+	status = "okay";
+};
+
 &pcie0 {
 	pinctrl-0 = <&pcie0_default_state>;
 	pinctrl-names = "default";
@@ -531,6 +615,11 @@ usb2_id: usb2-id-state {
 	};
 };
 
+&qup_i2c0_data_clk {
+	drive-strength = <2>;
+	bias-pull-up;
+};
+
 &qupv3_id_0 {
 	firmware-name = "qcom/qcs8300/qupv3fw.elf";
 	status = "okay";
diff --git a/arch/arm64/boot/dts/qcom/monaco.dtsi b/arch/arm64/boot/dts/qcom/monaco.dtsi
index f92fdb1cefa0..5741cdbde3f5 100644
--- a/arch/arm64/boot/dts/qcom/monaco.dtsi
+++ b/arch/arm64/boot/dts/qcom/monaco.dtsi
@@ -5893,6 +5893,12 @@ tlmm: pinctrl@f100000 {
 			#interrupt-cells = <2>;
 			wakeup-parent = <&pdc>;
 
+			dp_hot_plug_det: dp-hot-plug-det-state {
+				pins = "gpio94";
+				function = "edp0_hot";
+				bias-disable;
+			};
+
 			hs0_mi2s_active: hs0-mi2s-active-state {
 				pins = "gpio106", "gpio107", "gpio108", "gpio109";
 				function = "hs0_mi2s";

-- 
2.34.1

[PATCH v4 2/2] arm64: defconfig: Enable Lontium LT8713sx driver

[Vishnu Saini]

Lontium LT8713sx DP bridge hub can be found on a Qualcomm
Monaco EVK board for converting 1 DP to 3 DP outputs.

Signed-off-by: Vishnu Saini <vishnu.saini@oss.qualcomm.com>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 1d967a81b82a..57ea37e4d9ac 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -1005,6 +1005,7 @@ CONFIG_DRM_ITE_IT6263=m
 CONFIG_DRM_LONTIUM_LT8912B=m
 CONFIG_DRM_LONTIUM_LT9611=m
 CONFIG_DRM_LONTIUM_LT9611UXC=m
+CONFIG_DRM_LONTIUM_LT8713SX=m
 CONFIG_DRM_ITE_IT66121=m
 CONFIG_DRM_NWL_MIPI_DSI=m
 CONFIG_DRM_PARADE_PS8640=m

-- 
2.34.1

Re: [PATCH v4 1/2] arm64: dts: qcom: monaco-evk: add lt8713sx bridge with displayport

[Konrad Dybcio]

On 3/18/26 8:08 PM, Vishnu Saini wrote:
> Monaco-evk has LT8713sx which act as DP to 3 DP output
> converter. Edp PHY from monaco soc is connected to lt8713sx
> as input and output of lt8713sx is connected to 3 mini DP ports.
> 
> Two ports are available in mainboard and one port
> is available on Mezz board.
> 
> lt8713sx is connected to soc over i2c0 and with reset gpio
> connected to pin6 of ioexpander5.
> 
> Enable the edp nodes from monaco and enable lontium lt8713sx
> bridge node.
> 
> Co-developed-by: Prahlad Valluru <vvalluru@qti.qualcomm.com>
> Signed-off-by: Prahlad Valluru <vvalluru@qti.qualcomm.com>
> Signed-off-by: Vishnu Saini <vishnu.saini@oss.qualcomm.com>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---

[...]

> +			port@0 {
> +				reg = <0>;
> +				lt8713sx_dp_in: endpoint {

nit: it'd be neat to have a \n before the property and the following
subnodes

otherwise

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

Konrad

Re: [PATCH v4 1/2] arm64: dts: qcom: monaco-evk: add lt8713sx bridge with displayport

[Vishnu Saini]

On Thu, Mar 19, 2026 at 11:11:20AM +0100, Konrad Dybcio wrote:
> On 3/18/26 8:08 PM, Vishnu Saini wrote:
> > Monaco-evk has LT8713sx which act as DP to 3 DP output
> > converter. Edp PHY from monaco soc is connected to lt8713sx
> > as input and output of lt8713sx is connected to 3 mini DP ports.
> > 
> > Two ports are available in mainboard and one port
> > is available on Mezz board.
> > 
> > lt8713sx is connected to soc over i2c0 and with reset gpio
> > connected to pin6 of ioexpander5.
> > 
> > Enable the edp nodes from monaco and enable lontium lt8713sx
> > bridge node.
> > 
> > Co-developed-by: Prahlad Valluru <vvalluru@qti.qualcomm.com>
> > Signed-off-by: Prahlad Valluru <vvalluru@qti.qualcomm.com>
> > Signed-off-by: Vishnu Saini <vishnu.saini@oss.qualcomm.com>
> > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> > ---
> 
> [...]
> 
> > +			port@0 {
> > +				reg = <0>;
> > +				lt8713sx_dp_in: endpoint {
> 
> nit: it'd be neat to have a \n before the property and the following
> subnodes

sure, will add a blank line between reg property and lt8713sx_dp endpoint subnodes in next revision.
 
> otherwise
> 
> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
> 
> Konrad

Re: (subset) [PATCH v4 0/2] Enable lt8713sx bridge with displayport for monaco-evk

[Bjorn Andersson]

On Thu, 19 Mar 2026 00:38:18 +0530, Vishnu Saini wrote:
> This series enables lt8713sx bridge and displayport on Qualcomm
> monaco-evk platform.
> 
> 

Applied, thanks!

[1/2] arm64: dts: qcom: monaco-evk: add lt8713sx bridge with displayport
      commit: fbe9b798a54a2fefb9345cf546ad74c24577337a

Best regards,
-- 
Bjorn Andersson <andersson@kernel.org>