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VPSS output to PCIe

KP Singh
Intellectual 360 points

Hi there,

i am from barco electronics, right now we are using dm8148 in streaming project.

our design consist of dm8148 and fpga. Our FPGA is mapped over GPMC and video out goes from RGB lines of  LCD interface.

Now we wish to use PCIe, so our video data as well control will go to FPGA over PCIe.

can any one help me understating how can i send VPSS out to PCIe so our FPGA can get those video signal.

Br

KP

  • 0
    TI__Mastermind 43875 points

    There is no direct path from the VPSS output back to the PCIe output.

    If you are not using any of the VPSS features such as scalers, composting, color conversion etc... then you could simply send your frame buffer to PCIe through your own protocol.

    If you are using HDVPSS features then you could use the write back path to dump the resultant display data back to memory for transfer through PCIe. I do not know if the drivers currently support this feature though.

    BR,

    Steve

  • 0 in reply to Steve Clynes
    Intellectual 360 points

    Hello Steve,

    i am reading on ti wiki.

    http://processors.wiki.ti.com/index.php/TI81XX_EDMA_Driver_User_Guide

    will above help ??

    sapose if i do not use croping and scaling then how to achive it can you give me some pointer

    KP

  • 0 in reply to KP Singh
    Intellectual 360 points

    Hello steve,

    plz check

    http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/124668.aspx

    this isquestion similar to me the only difference is he wants to make DM8168 as EP and windows or linux machine as RC while i want to make DM8148 as RC and my Xlinx FPGA as EP

  • 0 in reply to KP Singh
    TI__Mastermind 43875 points

    Unfortunately I can't help any further.

    If you need help with software then I suggest posting to the software forums.

    BR,

    Steve

  • 0 in reply to KP Singh
    TI__Guru**** 170625 points

    KP Singh,

    KP Singh said:
    while i want to make DM8148 as RC and my Xlinx FPGA as EP

    Please refer to the below wiki pages:

    http://processors.wiki.ti.com/index.php/TI81XX_PSP_PCI_Express_Root_Complex_Driver_User_Guide

    http://processors.wiki.ti.com/index.php/TI81XX_PCIe_FAQs

    Best regards,
    Pavel