linux-kernel - [PATCH 1/3] dt-bindings: display: nuvoton: add MA35D1 DCU binding

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Message-ID: <20260126085727.2568958-2-a0987203069@gmail.com>
Date: Mon, 26 Jan 2026 16:57:25 +0800
From: Joey Lu <a0987203069@...il.com>
To: airlied@...il.com,
	simona@...ll.ch,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: ychuang3@...oton.com,
	schung@...oton.com,
	yclu4@...oton.com,
	a0987203069@...il.com,
	linux-arm-kernel@...ts.infradead.org,
	dri-devel@...ts.freedesktop.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] dt-bindings: display: nuvoton: add MA35D1 DCU binding

Add Device Tree binding documentation for the Display Control
Unit (DCU) found in Nuvoton MA35D1 SoCs.

The DCU is a DPI-based display controller supporting RGB output
with optional external bridges or panels.

Signed-off-by: Joey Lu <a0987203069@...il.com>
---
 .../bindings/display/nuvoton,ma35d1-dcu.yaml  | 74 +++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/nuvoton,ma35d1-dcu.yaml

diff --git a/Documentation/devicetree/bindings/display/nuvoton,ma35d1-dcu.yaml b/Documentation/devicetree/bindings/display/nuvoton,ma35d1-dcu.yaml
new file mode 100644
index 000000000000..e3b79b5b7dbd
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/nuvoton,ma35d1-dcu.yaml
@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/nuvoton,ma35d1-dcu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton MA35D1 Display Controller Unit (DCU)
+
+maintainers:
+  - Joey Lu <a0987203069@...il.com>
+
+description:
+  The Nuvoton MA35D1 Display Controller Unit (DCU) supports multiple
+  layers of composition, blending, and output to parallel RGB (DPI)
+  interfaces.
+
+properties:
+  compatible:
+    const: nuvoton,ma35d1-dcu
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: DCU Gate clock for register access
+      - description: DCU Pixel clock for display timing
+
+  clock-names:
+    items:
+      - const: dcu_gate
+      - const: dcup_div
+
+  resets:
+    maxItems: 1
+
+  port:
+    $ref: /schemas/graph.yaml#/properties/port
+    description: Video output port
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - resets
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/nuvoton,ma35d1-clk.h>
+    #include <dt-bindings/reset/nuvoton,ma35d1-reset.h>
+
+    display@...60000 {
+        compatible = "nuvoton,ma35d1-drm";
+        reg = <0x40260000 0x2000>;
+        interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clk DCU_GATE>, <&clk DCUP_DIV>;
+        clock-names = "dcu_gate", "dcup_div";
+        resets = <&sys MA35D1_RESET_DISP>;
+
+        port {
+            dpi_out: endpoint {
+                remote-endpoint = <&panel_in>;
+            };
+        };
+    };
-- 
2.43.0