[PATCH V3 1/2] dt-bindings: drm/bridge: ti-sn65dsi83: Add TI SN65DSI83 and SN65DSI84 bindings

[Marek Vasut]

Add DT binding document for TI SN65DSI83 and SN65DSI84 DSI to LVDS bridge.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Douglas Anderson <dianders at chromium.org>
Cc: Jagan Teki <jagan at amarulasolutions.com>
Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Linus Walleij <linus.walleij at linaro.org>
Cc: Rob Herring <robh+dt at kernel.org>
Cc: Sam Ravnborg <sam at ravnborg.org>
Cc: Stephen Boyd <swboyd at chromium.org>
Cc: devicetree at vger.kernel.org
To: dri-devel at lists.freedesktop.org
---
V2: Add compatible string for SN65DSI84, since this is now tested on it
V3: - Add 0x2c as valid i2c address
    - Switch to schemas/graph.yaml
    - Constraint data-lanes to <1>, <1 2>, <1 2 3>, <1 2 3 4> only
    - Indent example by 4 spaces
    - Handle dual-link LVDS with two ports and describe the second DSI
      channel-B port as well. Based on the register defaults of DSI83
      and DSI84, it is likely that the LVDS-channel-B and DSI-channel-B
      hardware is present in all the chips, so just reuse port at 0 and 2
      for DSI83, port at 0,2,3 for DSI84 and all of 0,1,2,3 for DSI85 when
      that is supported
---
 .../bindings/display/bridge/ti,sn65dsi83.yaml | 171 ++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml

diff --git a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml
new file mode 100644
index 000000000000..4e7df92446a9
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi83.yaml
@@ -0,0 +1,171 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/ti,sn65dsi83.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SN65DSI83 and SN65DSI84 DSI to LVDS bridge chip
+
+maintainers:
+  - Marek Vasut <marex at denx.de>
+
+description: |
+  Texas Instruments SN65DSI83 1x Single-link MIPI DSI
+  to 1x Single-link LVDS
+  https://www.ti.com/lit/gpn/sn65dsi83
+  Texas Instruments SN65DSI84 1x Single-link MIPI DSI
+  to 1x Dual-link or 2x Single-link LVDS
+  https://www.ti.com/lit/gpn/sn65dsi84
+
+properties:
+  compatible:
+    oneOf:
+      - const: ti,sn65dsi83
+      - const: ti,sn65dsi84
+
+  reg:
+    oneOf:
+      - const: 0x2c
+      - const: 0x2d
+
+  enable-gpios:
+    maxItems: 1
+    description: GPIO specifier for bridge_en pin (active high).
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port at 0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Video port for MIPI DSI Channel-A input
+
+        properties:
+          endpoint:
+            $ref: /schemas/graph.yaml#/$defs/endpoint-base
+            unevaluatedProperties: false
+
+            properties:
+              data-lanes:
+                description: array of physical DSI data lane indexes.
+                minItems: 1
+                maxItems: 4
+                items:
+                  - const: 1
+                  - const: 2
+                  - const: 3
+                  - const: 4
+
+      port at 1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Video port for MIPI DSI Channel-B input
+
+        properties:
+          endpoint:
+            $ref: /schemas/graph.yaml#/$defs/endpoint-base
+            unevaluatedProperties: false
+
+            properties:
+              data-lanes:
+                description: array of physical DSI data lane indexes.
+                minItems: 1
+                maxItems: 4
+                items:
+                  - const: 1
+                  - const: 2
+                  - const: 3
+                  - const: 4
+
+      port at 2:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Video port for LVDS Channel-A output (panel or bridge).
+
+        properties:
+          endpoint:
+            $ref: /schemas/graph.yaml#/$defs/endpoint-base
+            description: LVDS Channel-A output endpoint
+            unevaluatedProperties: false
+
+      port at 3:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Video port for LVDS Channel-A output (panel or bridge).
+
+        properties:
+          endpoint:
+            $ref: /schemas/graph.yaml#/$defs/endpoint-base
+            description: LVDS Channel-B output endpoint
+            unevaluatedProperties: false
+
+    required:
+      - port at 0
+      - port at 2
+
+required:
+  - compatible
+  - reg
+  - enable-gpios
+  - ports
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,sn65dsi83
+    then:
+      properties:
+        ports:
+          properties:
+            port at 1: false
+            port at 3: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,sn65dsi84
+    then:
+      properties:
+        ports:
+          properties:
+            port at 1: false
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        bridge at 2d {
+            compatible = "ti,sn65dsi83";
+            reg = <0x2d>;
+
+            enable-gpios = <&gpio2 1 GPIO_ACTIVE_HIGH>;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port at 0 {
+                    reg = <0>;
+
+                    endpoint {
+                        remote-endpoint = <&dsi0_out>;
+                        data-lanes = <1 2 3 4>;
+                    };
+                };
+
+                port at 2 {
+                    reg = <2>;
+
+                    endpoint {
+                        remote-endpoint = <&panel_in_lvds>;
+                    };
+                };
+            };
+        };
+    };
-- 
2.30.2