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charset="utf-8" Add an optional boolean DT property "xlnx,include-stscntrl-strm" to indicate that the AXI DMA IP is configured with the AXI4-Stream status and control interface. This enables the use of APP fields in DMA descriptors for metadata reporting. This property is distinct from "xlnx,axistream-connected" and serves a different purpose: - "xlnx,include-stscntrl-strm": Indicates whether APP fields are present in DMA descriptors. When enabled, the driver can access status/control metadata through these descriptor fields. - "xlnx,axistream-connected": Indicates whether a streaming IP (client) is connected to the DMA IP. These two configurations are independent of each other. For example, in TSN (Time-Sensitive Networking) designs, a streaming client may be connected to the DMA IP, but the status/control stream interface is not enabled. In such cases, "xlnx,axistream-connected" would be present while "xlnx,include-stscntrl-strm" would be absent. Adding this property allows the driver to correctly determine descriptor layout and access APP fields only when the hardware supports them. Signed-off-by: Suraj Gupta Signed-off-by: Srinivas Neeli Reviewed-by: Rob Herring (Arm) --- .../devicetree/bindings/dma/xilinx/xlnx,axi-dma.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/dma/xilinx/xlnx,axi-dma.yaml= b/Documentation/devicetree/bindings/dma/xilinx/xlnx,axi-dma.yaml index 340ae9e91cb0..ad8afefe7ee3 100644 --- a/Documentation/devicetree/bindings/dma/xilinx/xlnx,axi-dma.yaml +++ b/Documentation/devicetree/bindings/dma/xilinx/xlnx,axi-dma.yaml @@ -105,6 +105,10 @@ properties: type: boolean description: Tells whether DMA is connected to AXI stream IP. =20 + xlnx,include-stscntrl-strm: + type: boolean + description: Tells hardware is configured with AXI4-stream status and = control interface. + patternProperties: "^dma-channel(-mm2s|-s2mm)?$": type: object --=20 2.43.0