dt-bindings: display: panel: one file of all simple LVDS panels with dual ports

To complement panel-simple.yaml, create panel-simple-lvds-dual-ports.yaml.
panel-simple-lvds-dual-ports.yaml is for all simple LVDS panels that
have dual LVDS ports and require only a single power-supply.
The first port receives odd pixels, and the second port receives even pixels.
Optionally, a backlight and an enable GPIO can be specified as properties.

Panels with swapped pixel order, if any, need dedicated bindings.

Migrate 'auo,g133han01', 'auo,g185han01', 'auo,g190ean01',
'koe,tx26d202vm0bwa' and 'nlt,nl192108ac18-02d' over to the new file.

The objectives with one file for all the simple LVDS panels with dual ports are:
- Make it simpler to add bindings for this kind of LVDS panels
- Keep the number of bindings file lower
- Keep the binding documentation for this kind of LVDS panels more consistent
- Make it possible for drivers to get pixel order via
  drm_of_lvds_get_dual_link_pixel_order(), as the 'ports' property is required

Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Liu Ying <victor.liu@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1613017672-2734-1-git-send-email-victor.liu@nxp.com
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 118 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple-lvds-dual-ports.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple-lvds-dual-ports.yaml
new file mode 100644
index 000000000000..a5a596ff8e75
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple-lvds-dual-ports.yaml
@@ -0,0 +1,118 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/panel-simple-lvds-dual-ports.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Simple LVDS panels with one power supply and dual LVDS ports
+
+maintainers:
+  - Liu Ying <victor.liu@nxp.com>
+  - Thierry Reding <thierry.reding@gmail.com>
+  - Sam Ravnborg <sam@ravnborg.org>
+
+description: |
+  This binding file is a collection of the LVDS panels that
+  has dual LVDS ports and requires only a single power-supply.
+  The first port receives odd pixels, and the second port receives even pixels.
+  There are optionally a backlight and an enable GPIO.
+  The panel may use an OF graph binding for the association to the display,
+  or it may be a direct child node of the display.
+
+  If the panel is more advanced a dedicated binding file is required.
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+
+  compatible:
+    enum:
+    # compatible must be listed in alphabetical order, ordered by compatible.
+    # The description in the comment is mandatory for each compatible.
+
+        # AU Optronics Corporation 13.3" FHD (1920x1080) TFT LCD panel
+      - auo,g133han01
+        # AU Optronics Corporation 18.5" FHD (1920x1080) TFT LCD panel
+      - auo,g185han01
+        # AU Optronics Corporation 19.0" (1280x1024) TFT LCD panel
+      - auo,g190ean01
+        # Kaohsiung Opto-Electronics Inc. 10.1" WUXGA (1920 x 1200) LVDS TFT LCD panel
+      - koe,tx26d202vm0bwa
+        # NLT Technologies, Ltd. 15.6" FHD (1920x1080) LVDS TFT LCD panel
+      - nlt,nl192108ac18-02d
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: The first sink port.
+
+        properties:
+          dual-lvds-odd-pixels:
+            type: boolean
+            description: The first sink port for odd pixels.
+
+        required:
+          - dual-lvds-odd-pixels
+
+      port@1:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: The second sink port.
+
+        properties:
+          dual-lvds-even-pixels:
+            type: boolean
+            description: The second sink port for even pixels.
+
+        required:
+          - dual-lvds-even-pixels
+
+    required:
+      - port@0
+      - port@1
+
+  backlight: true
+  enable-gpios: true
+  power-supply: true
+
+additionalProperties: false
+
+required:
+  - compatible
+  - ports
+  - power-supply
+
+examples:
+  - |
+    panel: panel-lvds {
+      compatible = "koe,tx26d202vm0bwa";
+      power-supply = <&vdd_lcd_reg>;
+
+      ports {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        port@0 {
+          dual-lvds-odd-pixels;
+          reg = <0>;
+
+          panel_lvds0_in: endpoint {
+            remote-endpoint = <&lvds0_out>;
+          };
+        };
+
+        port@1 {
+          dual-lvds-even-pixels;
+          reg = <1>;
+
+          panel_lvds1_in: endpoint {
+            remote-endpoint = <&lvds1_out>;
+          };
+        };
+      };
+    };