Documentation/devicetree/bindings/media/xilinx/xlnx,video.txt

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/media/xilinx/xlnx,video.txt

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/media/xilinx/xlnx,video.txt
Extension
.txt
Size
1402 bytes
Lines
56
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

Xilinx Video IP Pipeline (VIPP)
-------------------------------

General concept
---------------

Xilinx video IP pipeline processes video streams through one or more Xilinx
video IP cores. Each video IP core is represented as documented in video.txt
and IP core specific documentation, xlnx,v-*.txt, in this directory. The DT
node of the VIPP represents as a top level node of the pipeline and defines
mappings between DMAs and the video IP cores.

Required properties:

- compatible: Must be "xlnx,video".

- dmas, dma-names: List of one DMA specifier and identifier string (as defined
  in Documentation/devicetree/bindings/dma/dma.txt) per port. Each port
  requires a DMA channel with the identifier string set to "port" followed by
  the port index.

- ports: Video port, using the DT bindings defined in ../video-interfaces.txt.

Required port properties:

- direction: should be either "input" or "output" depending on the direction
  of stream.

Example:

	video_cap {
		compatible = "xlnx,video";
		dmas = <&vdma_1 1>, <&vdma_3 1>;
		dma-names = "port0", "port1";

		ports {
			#address-cells = <1>;
			#size-cells = <0>;

			port@0 {
				reg = <0>;
				direction = "input";
				vcap0_in0: endpoint {
					remote-endpoint = <&scaler0_out>;
				};
			};
			port@1 {
				reg = <1>;
				direction = "input";
				vcap0_in1: endpoint {
					remote-endpoint = <&switch_out1>;
				};
			};
		};
	};

Annotation

Implementation Notes