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AM5718 SDK8 use XDMA drivers in poll mode always timeout

chengjie zhao
Prodigy 20 points

Other Parts Discussed in Thread: AM5718

   

System Version：Linux MI1016 5.10.100-1.0.1 Xilinx#151 SMP PREEMPT IRQPIPE Wed Nov 13 16:03:16 CST 2024 armv7l armv7l armv7l GNU/Linux
Hardware：TI AM5718

fd=open("/dev/xdma0_c2h_0")
read(fd, buffer, 131072);

make POLLING=1 DEBUG=1 

when I use  XDMA driver in AM5718, rcveiving data from FPGA , when  it is interrupt-mode , it`s ok to rcv data , but overtime about 10us sometime. it always overtime a long time when poll mode . and when I use the same driver in other platform ,it is ok to rcv realtime data. 

Hope the answering 

  • 0
    TI__Guru 54225 points

    您好，

    已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

  • 0
    TI__Guru 51570 points

    Unfortunately this is a module that is not supported by our SDK. The Linux version you are utilizing pertains to an SDK that has also been moved to as-is support model since it is from 2022. 

    Please consult with the open source community for more support.

    My initial guess is that there might be more to the DMA implementation on the backend on AM57x device.