dt-bindings: display: Convert Allwinner display pipeline to schemas

The Allwinner SoCs have a display engine composed of several controllers
assembled differently depending on the SoC, the number and type of output
they have, and the additional features they provide. A number of those are
supported in Linux, with the matching bindings.

Now that we have the DT validation in place, let's split into separate file
and convert the device tree bindings for those controllers to schemas.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20200103152801.47254-1-maxime@cerno.tech

1 files changed, 133 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/display/allwinner,sun9i-a80-deu.yaml b/Documentation/devicetree/bindings/display/allwinner,sun9i-a80-deu.yaml
new file mode 100644
index 000000000000..96de41d32b3e
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/allwinner,sun9i-a80-deu.yaml
@@ -0,0 +1,133 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/allwinner,sun9i-a80-deu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A80 Detail Enhancement Unit Device Tree Bindings
+
+maintainers:
+  - Chen-Yu Tsai <wens@csie.org>
+  - Maxime Ripard <mripard@kernel.org>
+
+description: |
+  The DEU (Detail Enhancement Unit), found in the Allwinner A80 SoC,
+  can sharpen the display content in both luma and chroma channels.
+
+properties:
+  compatible:
+    const: allwinner,sun9i-a80-deu
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: The DEU interface clock
+      - description: The DEU module clock
+      - description: The DEU DRAM clock
+
+  clock-names:
+    items:
+      - const: ahb
+      - const: mod
+      - const: ram
+
+  resets:
+    maxItems: 1
+
+  ports:
+    type: object
+    description: |
+      A ports node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+
+    properties:
+      "#address-cells":
+        const: 1
+
+      "#size-cells":
+        const: 0
+
+      port@0:
+        type: object
+        description: |
+          Input endpoints of the controller.
+
+      port@1:
+        type: object
+        description: |
+          Output endpoints of the controller.
+
+    required:
+      - "#address-cells"
+      - "#size-cells"
+      - port@0
+      - port@1
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - resets
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    #include <dt-bindings/clock/sun9i-a80-de.h>
+    #include <dt-bindings/reset/sun9i-a80-de.h>
+
+    deu0: deu@3300000 {
+        compatible = "allwinner,sun9i-a80-deu";
+        reg = <0x03300000 0x40000>;
+        interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&de_clocks CLK_BUS_DEU0>,
+                 <&de_clocks CLK_IEP_DEU0>,
+                 <&de_clocks CLK_DRAM_DEU0>;
+        clock-names = "ahb",
+                      "mod",
+                      "ram";
+        resets = <&de_clocks RST_DEU0>;
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            deu0_in: port@0 {
+                reg = <0>;
+
+                deu0_in_fe0: endpoint {
+                    remote-endpoint = <&fe0_out_deu0>;
+                };
+            };
+
+            deu0_out: port@1 {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <1>;
+
+                deu0_out_be0: endpoint@0 {
+                    reg = <0>;
+                    remote-endpoint = <&be0_in_deu0>;
+                };
+
+                deu0_out_be1: endpoint@1 {
+                    reg = <1>;
+                    remote-endpoint = <&be1_in_deu0>;
+                };
+            };
+        };
+    };
+
+...