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@gmail.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@gmail.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@40260000 {
+ 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>;
+ };
+ };
+ };
--
2.43.0On Mon, 26 Jan 2026 16:57:25 +0800, Joey Lu wrote: > 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@gmail.com> > --- > .../bindings/display/nuvoton,ma35d1-dcu.yaml | 74 +++++++++++++++++++ > 1 file changed, 74 insertions(+) > create mode 100644 Documentation/devicetree/bindings/display/nuvoton,ma35d1-dcu.yaml > My bot found errors running 'make dt_binding_check' on your patch: yamllint warnings/errors: dtschema/dtc warnings/errors: Documentation/devicetree/bindings/display/nuvoton,ma35d1-dcu.example.dtb: /example-0/display@40260000: failed to match any schema with compatible: ['nuvoton,ma35d1-drm'] doc reference errors (make refcheckdocs): See https://patchwork.kernel.org/project/devicetree/patch/20260126085727.2568958-2-a0987203069@gmail.com The base for the series is generally the latest rc1. A different dependency should be noted in *this* patch. If you already ran 'make dt_binding_check' and didn't see the above error(s), then make sure 'yamllint' is installed and dt-schema is up to date: pip3 install dtschema --upgrade Please check and re-submit after running the above command yourself. Note that DT_SCHEMA_FILES can be set to your schema file to speed up checking your schema. However, it must be unset to test all examples with your schema.
On 1/26/2026 6:30 PM, Rob Herring (Arm) wrote: > On Mon, 26 Jan 2026 16:57:25 +0800, Joey Lu wrote: >> 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@gmail.com> >> --- >> .../bindings/display/nuvoton,ma35d1-dcu.yaml | 74 +++++++++++++++++++ >> 1 file changed, 74 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/display/nuvoton,ma35d1-dcu.yaml >> > My bot found errors running 'make dt_binding_check' on your patch: > > yamllint warnings/errors: > > dtschema/dtc warnings/errors: > Documentation/devicetree/bindings/display/nuvoton,ma35d1-dcu.example.dtb: /example-0/display@40260000: failed to match any schema with compatible: ['nuvoton,ma35d1-drm'] > > doc reference errors (make refcheckdocs): > > See https://patchwork.kernel.org/project/devicetree/patch/20260126085727.2568958-2-a0987203069@gmail.com > > The base for the series is generally the latest rc1. A different dependency > should be noted in *this* patch. > > If you already ran 'make dt_binding_check' and didn't see the above > error(s), then make sure 'yamllint' is installed and dt-schema is up to > date: > > pip3 install dtschema --upgrade > > Please check and re-submit after running the above command yourself. Note > that DT_SCHEMA_FILES can be set to your schema file to speed up checking > your schema. However, it must be unset to test all examples with your schema. Thanks, I'll fix the YAML binding issues in the next revision. Joey
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