[1/2] dt-bindings: display: bridge: lt9211: Add Lontium LT9211 bridge driver

Add bindings for Lontium LT9211 Single/Dual-Link DSI/LVDS or Single DPI to
Single-link/Dual-Link DSI/LVDS or Single DPI bridge. This chip is highly
capable at converting formats, but sadly it is also highly undocumented.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: devicetree@vger.kernel.org
To: dri-devel@lists.freedesktop.org
---
 .../display/bridge/lontium,lt9211.yaml        | 117 ++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml

On Wed, Mar 30, 2022 at 11:22:30PM +0200, Marek Vasut wrote:
> Add bindings for Lontium LT9211 Single/Dual-Link DSI/LVDS or Single DPI to
> Single-link/Dual-Link DSI/LVDS or Single DPI bridge. This chip is highly
> capable at converting formats, but sadly it is also highly undocumented.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: Lucas Stach <l.stach@pengutronix.de>
> Cc: Maxime Ripard <maxime@cerno.tech>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Robert Foss <robert.foss@linaro.org>
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Cc: Thomas Zimmermann <tzimmermann@suse.de>
> Cc: devicetree@vger.kernel.org
> To: dri-devel@lists.freedesktop.org
> ---
>  .../display/bridge/lontium,lt9211.yaml        | 117 ++++++++++++++++++
>  1 file changed, 117 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml b/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml
> new file mode 100644
> index 000000000000..2faa855b3824
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/lontium,lt9211.yaml
> @@ -0,0 +1,117 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/lontium,lt9211.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Lontium LT9211 DSI/LVDS/DPI to DSI/LVDS/DPI bridge.
> +
> +maintainers:
> +  - Marek Vasut <marex@denx.de>
> +
> +description: |
> +  The LT9211 are bridge devices which convert Single/Dual-Link DSI/LVDS
> +  or Single DPI to Single/Dual-Link DSI/LVDS or Single DPI.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - lontium,lt9211
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  reset-gpios:
> +    maxItems: 1
> +    description: GPIO connected to active high RESET pin.
> +
> +  vccio-supply:
> +    description: Regulator for 1.8V IO power.
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description:
> +          Primary MIPI DSI port-1 for MIPI input or
> +          LVDS port-1 for LVDS input or DPI input.
> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description:
> +          Additional MIPI port-2 for MIPI input or LVDS port-2
> +          for LVDS input. Used in combination with primary
> +          port-1 to drive higher resolution displays
> +
> +      port@2:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description:
> +          Primary MIPI DSI port-1 for MIPI output or
> +          LVDS port-1 for LVDS output or DPI output.
> +
> +      port@3:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description:
> +          Additional MIPI port-2 for MIPI output or LVDS port-2
> +          for LVDS output. Used in combination with primary
> +          port-1 to drive higher resolution displays.
> +
> +    required:
> +      - port@0
> +      - port@2
> +
> +required:
> +  - compatible
> +  - reg
> +  - vccio-supply
> +  - ports
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    i2c10 {

i2c {

With that,

Reviewed-by: Rob Herring <robh@kernel.org>

> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      hdmi-bridge@3b {
> +        compatible = "lontium,lt9211";
> +        reg = <0x3b>;
> +
> +        reset-gpios = <&tlmm 128 GPIO_ACTIVE_HIGH>;
> +        interrupts-extended = <&tlmm 84 IRQ_TYPE_EDGE_FALLING>;
> +
> +        vccio-supply = <&lt9211_1v8>;
> +
> +        ports {
> +          #address-cells = <1>;
> +          #size-cells = <0>;
> +
> +          port@0 {
> +            reg = <0>;
> +
> +            endpoint {
> +              remote-endpoint = <&dsi0_out>;
> +            };
> +          };
> +
> +          port@2 {
> +            reg = <2>;
> +
> +            endpoint {
> +              remote-endpoint = <&panel_in_lvds>;
> +            };
> +          };
> +        };
> +      };
> +    };
> +
> +...
> -- 
> 2.35.1
> 
>