On Fri, 13 Mar 2026 11:55:32 +0530, Srinivas Neeli wrote:

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 <redacted>
Signed-off-by: Srinivas Neeli <srinivas.neeli@amd.com>
---
 .../devicetree/bindings/dma/xilinx/xlnx,axi-dma.yaml          | 4 ++++
 1 file changed, 4 insertions(+)

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>