[RFC PATCH 3/4] dt-bindings: panel: Introduce dual-link LVDS panel

[Aradhya Bhatia]

Dual-link LVDS interfaces have 2 links, with even pixels traveling on
one link, and odd pixels on the other. These panels are also generic in
nature, with no documented constraints, much like their single-link
counterparts, "panel-lvds".

Add a new compatible, "panel-dual-lvds", and a dt-binding document for
these panels.

Signed-off-by: Aradhya Bhatia <a-bhatia1 at ti.com>
---
 .../display/panel/panel-dual-lvds.yaml        | 157 ++++++++++++++++++
 MAINTAINERS                                   |   1 +
 2 files changed, 158 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/panel-dual-lvds.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/panel-dual-lvds.yaml b/Documentation/devicetree/bindings/display/panel/panel-dual-lvds.yaml
new file mode 100644
index 000000000000..88a7aa2410be
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/panel-dual-lvds.yaml
@@ -0,0 +1,157 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/panel-dual-lvds.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic Dual-Link LVDS Display Panel
+
+maintainers:
+  - Aradhya Bhatia <a-bhatia1 at ti.com>
+  - Thierry Reding <thierry.reding at gmail.com>
+
+description: |
+  A dual-LVDS interface is a dual-link connection with the even pixels
+  traveling on one link, and the odd pixels traveling on the other.
+
+allOf:
+  - $ref: panel-common.yaml#
+  - $ref: /schemas/display/lvds.yaml/#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - lincolntech,lcd185-101ct
+              - microtips,13-101hieb0hf0-s
+          - const: panel-dual-lvds
+      - const: panel-dual-lvds
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port at 0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: The sink for first set of LVDS pixels.
+
+        properties:
+          dual-lvds-odd-pixels:
+            type: boolean
+
+          dual-lvds-even-pixels:
+            type: boolean
+
+        oneOf:
+          - required: [dual-lvds-odd-pixels]
+          - required: [dual-lvds-even-pixels]
+
+      port at 1:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: The sink for second set of LVDS pixels.
+
+        properties:
+          dual-lvds-even-pixels:
+            type: boolean
+
+          dual-lvds-odd-pixels:
+            type: boolean
+
+        oneOf:
+          - required: [dual-lvds-even-pixels]
+          - required: [dual-lvds-odd-pixels]
+
+    allOf:
+      - if:
+          properties:
+            port at 0:
+              properties:
+                dual-lvds-odd-pixels: true
+              required:
+                - dual-lvds-odd-pixels
+        then:
+          properties:
+            port at 1:
+              properties:
+                dual-lvds-even-pixels: true
+                dual-lvds-odd-pixels: false
+
+      - if:
+          properties:
+            port at 0:
+              properties:
+                dual-lvds-even-pixels: true
+              required:
+                - dual-lvds-even-pixels
+        then:
+          properties:
+            port at 1:
+              properties:
+                dual-lvds-odd-pixels: true
+                dual-lvds-even-pixels: false
+
+    required:
+      - port at 0
+      - port at 1
+
+  port: false
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - width-mm
+  - height-mm
+  - data-mapping
+  - panel-timing
+  - ports
+
+examples:
+  - |+
+    panel-dual-lvds {
+      compatible = "microtips,13-101hieb0hf0-s", "panel-dual-lvds";
+
+      width-mm = <217>;
+      height-mm = <136>;
+
+      data-mapping = "vesa-24";
+
+      panel-timing {
+        clock-frequency = <150275000>;
+        hactive = <1920>;
+        vactive = <1200>;
+        hfront-porch = <32>;
+        hsync-len = <52>;
+        hback-porch = <24>;
+        vfront-porch = <24>;
+        vsync-len = <8>;
+        vback-porch = <3>;
+        de-active = <1>;
+      };
+
+      ports {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        port at 0 {
+          reg = <0>;
+          dual-lvds-odd-pixels;
+          lcd_in0: endpoint {
+            remote-endpoint = <&oldi_out0>;
+          };
+        };
+
+        port at 1 {
+          reg = <1>;
+          dual-lvds-even-pixels;
+          lcd_in1: endpoint {
+            remote-endpoint = <&oldi_out1>;
+          };
+        };
+      };
+    };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 7f86d02cb427..c13f24293ab1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6595,6 +6595,7 @@ T:	git git://anongit.freedesktop.org/drm/drm-misc
 S:	Maintained
 F:	drivers/gpu/drm/panel/panel-lvds.c
 F:	Documentation/devicetree/bindings/display/lvds.yaml
+F:	Documentation/devicetree/bindings/display/panel/panel-dual-lvds.yaml
 F:	Documentation/devicetree/bindings/display/panel/panel-lvds.yaml
 
 DRM DRIVER FOR MANTIX MLAF057WE51 PANELS
-- 
2.39.0