[PATCH 1/3] dt-bindings: arm: mediatek: mmsys: Allow single vdo/mmsys endpoint
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Date: 2026-01-08 14:39:47
Also in:
linux-arm-kernel, linux-mediatek, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
The hardware supports using just a single output while leaving all of the others unconfigured (disabled), but the binding did not really allow specifying a single endpoint@0, because in this case one must either: - Call the subnode `endpoint` and not declare any address and/or size cells; or - Call the subnode `endpoint@0` and have at least one more other endpoint(@1 or @2), and declare address/size cells. Allow specifying a single `endpoint` subnode, without the `@0` implicit suffix to suppress warnings happening on this kind of valid usecase. Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- .../bindings/arm/mediatek/mediatek,mmsys.yaml | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
index 3f4262e93c78..e3ef7540c24f 100644
--- a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
+++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml@@ -100,11 +100,12 @@ properties: the first component of one display pipeline, for example one of the available OVL or RDMA blocks. Some MediaTek SoCs support multiple display outputs per MMSYS. - properties: - endpoint@0: + patternProperties: + "^endpoint(@0)?$": $ref: /schemas/graph.yaml#/properties/endpoint description: Output to the primary display pipeline + properties: endpoint@1: $ref: /schemas/graph.yaml#/properties/endpoint description: Output to the secondary display pipeline
@@ -114,8 +115,11 @@ properties: description: Output to the tertiary display pipeline anyOf: - - required: - - endpoint@0 + - oneOf: + - required: + - endpoint + - required: + - endpoint@0 - required: - endpoint@1 - required:
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2.52.0