media: dt-bindings: nuvoton: Add NPCM VCD and ECE engine

Add dt-bindings document for Video Capture/Differentiation Engine
(VCD) and Encoding Compression Engine (ECE) present on Nuvoton NPCM
SoCs.
Signed-off-by: Marvin Lin <milkfafa@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Documentation/devicetree/bindings/media/nuvoton,npcm-ece.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/nuvoton,npcm-ece.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton NPCM Encoding Compression Engine
+
+maintainers:
+  - Joseph Liu <kwliu@nuvoton.com>
+  - Marvin Lin <kflin@nuvoton.com>
+
+description: |
+  Video Encoding Compression Engine (ECE) present on Nuvoton NPCM SoCs.
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,npcm750-ece
+      - nuvoton,npcm845-ece
+
+  reg:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/reset/nuvoton,npcm7xx-reset.h>
+
+    ece: video-codec@f0820000 {
+        compatible = "nuvoton,npcm750-ece";
+        reg = <0xf0820000 0x2000>;
+        resets = <&rstc NPCM7XX_RESET_IPSRST2 NPCM7XX_RESET_ECE>;
+    };

Documentation/devicetree/bindings/media/nuvoton,npcm-vcd.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/nuvoton,npcm-vcd.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton NPCM Video Capture/Differentiation Engine
+
+maintainers:
+  - Joseph Liu <kwliu@nuvoton.com>
+  - Marvin Lin <kflin@nuvoton.com>
+
+description: |
+  Video Capture/Differentiation Engine (VCD) present on Nuvoton NPCM SoCs.
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,npcm750-vcd
+      - nuvoton,npcm845-vcd
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  nuvoton,sysgcr:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to access GCR (Global Control Register) registers.
+
+  nuvoton,sysgfxi:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to access GFXI (Graphics Core Information) registers.
+
+  nuvoton,ece:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to access ECE (Encoding Compression Engine) registers.
+
+  memory-region:
+    maxItems: 1
+    description:
+      CMA pool to use for buffers allocation instead of the default CMA pool.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - resets
+  - nuvoton,sysgcr
+  - nuvoton,sysgfxi
+  - nuvoton,ece
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/reset/nuvoton,npcm7xx-reset.h>
+
+    vcd: vcd@f0810000 {
+        compatible = "nuvoton,npcm750-vcd";
+        reg = <0xf0810000 0x10000>;
+        interrupts = <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;
+        resets = <&rstc NPCM7XX_RESET_IPSRST2 NPCM7XX_RESET_VCD>;
+        nuvoton,sysgcr = <&gcr>;
+        nuvoton,sysgfxi = <&gfxi>;
+        nuvoton,ece = <&ece>;
+    };