Re: [PATCH v3 1/2] dt-bindings: bridge: lt8713sx: Add bindings
From: Vishnu Saini
Date: Fri Feb 20 2026 - 01:24:20 EST
On Sun, Dec 28, 2025 at 04:20:46PM +0200, Dmitry Baryshkov wrote:
> On Sun, Dec 28, 2025 at 05:10:39PM +0530, Vishnu Saini wrote:
> > Add bindings for lt8713sx.
> >
> > Co-developed-by: Prahlad Valluru <vvalluru@xxxxxxxxxxxxxxxx>
> > Signed-off-by: Prahlad Valluru <vvalluru@xxxxxxxxxxxxxxxx>
> > Signed-off-by: Vishnu Saini <vishnu.saini@xxxxxxxxxxxxxxxx>
> > ---
> > .../bindings/display/bridge/lontium,lt8713sx.yaml | 101 +++++++++++++++++++++
> > 1 file changed, 101 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/display/bridge/lontium,lt8713sx.yaml b/Documentation/devicetree/bindings/display/bridge/lontium,lt8713sx.yaml
> > new file mode 100644
> > index 000000000000..0a6dc56e337c
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/display/bridge/lontium,lt8713sx.yaml
> > @@ -0,0 +1,101 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/display/bridge/lontium,lt8713sx.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Lontium LT8713SX Type-C/DP1.4 to Type-C/DP1.4/HDMI2.0/DP++ bridge-hub
> > +
> > +maintainers:
> > + - Tony <syyang@xxxxxxxxxxx>
>
> Is he/she aware of this?
>
yes, Got the confirmation in email for upstreaming. I will add him in CC in next patch.
> > +
> > +description:
> > + The Lontium LT8713SX is a Type-C/DP1.4 to Type-C/DP1.4/HDMI2.0 converter
> > + that integrates one DP input and up to three configurable output interfaces
> > + (DP1.4 / HDMI2.0 / DP++), with SST/MST functionality and audio support.
> > +
> > +properties:
> > + compatible:
> > + enum:
> > + - lontium,lt8713sx
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + vcc-supply:
> > + description: Regulator for 3.3V vcc.
> > +
> > + vdd-supply:
> > + description: Regulator for 1.1V vdd.
> > +
> > + reset-gpios:
> > + description: GPIO connected to active low RESET pin.
> > +
> > + ports:
> > + $ref: /schemas/graph.yaml#/properties/ports
> > +
> > + properties:
> > + port@0:
> > + $ref: /schemas/graph.yaml#/properties/port
> > + description:
> > + DP port for DP input from soc to bridge chip
> > +
> > + port@1:
> > + $ref: /schemas/graph.yaml#/properties/port
> > + description:
> > + DP port for DP output from bridge
> > +
> > + port@2:
> > + $ref: /schemas/graph.yaml#/properties/port
> > + description:
> > + Additional DP port for DP output from bridge
>
> Why do you have only two output ports here? The datasheet documents
> three ports.
Currently using only 2 ports in rb4 main board, 3rd edp port is in mezz board.
Will add one more port in next patch.
> > +
> > + required:
> > + - port@0
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - ports
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/gpio/gpio.h>
> > +
> > + i2c {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + bridge@4f {
> > + compatible = "lontium,lt8713sx";
> > + reg = <0x4f>;
> > + reset-gpios = <&tlmm 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>;
> > + };
> > + };
> > + };
> > + };
> > + };
> >
> > --
> > 2.34.1
> >
Sorry maintainers for delay in update on lt8713sx driver and dt series.
I was on travel and than went on leave for a couple of weeks. Will be dedicately work on this now.
> --
> With best wishes
> Dmitry