[RFC PATCH 1/6] dt-bindings: display/bridge: Add binding for input mux bridge

Guido Günther
2020-05-15T13:12:36Z

The bridge allows to select the input source via a mux controller.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
---
.../display/bridge/mux-input-bridge.yaml | 123 ++++++++++++++++++
1 file changed, 123 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/bridge/mux-input-bridge.yaml

diff --git a/Documentation/devicetree/bindings/display/bridge/mux-input-bridge.yaml b/Documentation/devicetree/bindings/display/bridge/mux-input-bridge.yaml
new file mode 100644
index 000000000000..4029cf63ee5c
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/mux-input-bridge.yaml
@@ -0,0 +1,123 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/mux-input-bridge.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: DRM input source selection via multiplexer
+
+maintainers:
+ - Guido Gúnther <agx@sigxcpu.org>
+
+description: |
+ The input multiplexer bridge allows to select an input source
+ via an associated mux controller.
+
+properties:
+ compatible:
+ const: mux-input-bridge
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ default-input:
+ description: The default input to use
+
+ mux-controls:
+ description:
+ mux controller node to use for operating the input mux
+
+ ports:
+ type: object
+ properties:
+ '#address-cells':
+ const: 1
+ '#size-cells':
+ const: 0
+
+ patternProperties:
+ "^port@[0-9]+":
+ type: object
+ description:
+ At least three nodes containing endpoints connecting to the
+ pixel data inputs and outputs. The last port is always the
+ output port.
+
+ properties:
+ reg:
+ maxItems: 1
+
+ endpoint:
+ description: sub-node describing the input
+ type: object
+
+ required:
+ - reg
+
+ additionalProperties: false
+
+ required:
+ - port@0
+ - port@1
+ - port@2
+
+ additionalProperties: false
+
+required:
+ - '#address-cells'
+ - '#size-cells'
+ - mux-controls
+ - ports
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ mux: mux-controller {
+ compatible = "gpio-mux";
+ #mux-control-cells = <0>;
+
+ mux-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
+ };
+
+ mipi-mux {
+ compatible = "mux-input-bridge";
+ default-input = <0>;
+ mux-controls = <&mux 0>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+
+ dpi_mux_from_lcdif: endpoint {
+ remote-endpoint = <&lcdif_dpi_out>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+
+ dpi_mux_from_dccss: endpoint {
+ remote-endpoint = <&dcss_dpi_out>;
+ };
+ };
+
+ port@2 {
+ reg = <2>;
+
+ dpi_mux_out: endpoint {
+ remote-endpoint = <&nwl_dpi_in>;
+ };
+ };
+ };
+ };
--
2.26.1