[PATCHv2] dt-bindings: dp-connector: add binding for DisplayPort connector

[Tomi Valkeinen]

Add binding for DisplayPort connector. A few notes:

* Similar to hdmi-connector, it has hpd-gpios as an optional property,
  as the HPD could also be handled by, e.g., the DP bridge.

* dp-pwr-supply, which provides 3.3V on DP_PWR pin, is optional, as it
  is not strictly required: standard DP cables do not even have the pin
  connected.

* Connector type. Full size and mini connectors are identical except for
  the connector size and form, so I believe there is no functional need
  for this property. But similar to 'label' property, it might be used
  to present information about the connector to the userspace.

* No eDP. There's really no "eDP connector", as it's always a custom
  made connection between the DP and the DP panel. So possibly there is
  no need for edp-connector binding, but even if there is, I don't want
  to guess what it could look like, and could it be part of the
  dp-connector binding.

* No DP++. I'm not familiar with DP++, but I think it's all handled by
  the DP bridge, and does not need any new properties to the dp-connector.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
---

Changes in v2: Add connector type.


 .../display/connector/dp-connector.yaml       | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/connector/dp-connector.yaml

diff --git a/Documentation/devicetree/bindings/display/connector/dp-connector.yaml b/Documentation/devicetree/bindings/display/connector/dp-connector.yaml
new file mode 100644
index 000000000000..b5fc3e52899e
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/connector/dp-connector.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/connector/dp-connector.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: DisplayPort Connector
+
+maintainers:
+  - Tomi Valkeinen <tomi.valkeinen at ti.com>
+
+properties:
+  compatible:
+    const: dp-connector
+
+  label: true
+
+  type:
+    enum:
+      - full-size
+      - mini
+
+  hpd-gpios:
+    description: A GPIO line connected to HPD
+    maxItems: 1
+
+  dp-pwr-supply:
+    description: Power supply for the DP_PWR pin
+    maxItems: 1
+
+  port:
+    description: Connection to controller providing DP signals
+
+required:
+  - compatible
+  - type
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    connector {
+        compatible = "dp-connector";
+        label = "dp0";
+        type = "full-size";
+
+        port {
+            dp_connector_in: endpoint {
+                remote-endpoint = <&dp_out>;
+            };
+        };
+    };
+
+...
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