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To take advantage of DWC3 internal TRB prefetch and cache for performance, inform the controller the last request with stream_id before switching to a different stream transfer. This allows the controller to maintain its transfer burst within the stream ID. Introduce the usb-request is_last field to help inform the DWC3 controller of this. Signed-off-by: Thinh Nguyen <thinhn@synopsys.com> Signed-off-by: Felipe Balbi <balbi@kernel.org> |
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