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No interrupts in VPIF display driver

Ray Z
Prodigy 200 points

Hello everybody, I want PAL video out through composite in DM6467, when I run dmai sample app video appMain.dm6467.o470MV, it blocks in VIDIOC_DQBUF, then i debug it, I found only one interrupt happened in initialization. each video channel clock is enable but I don't what else I need to do to let interrupt work continuesly. can someone help me? thanks!

  • 0
    Guru 31670 points

    Ray,

    You can quickly do this by disabling interrupt completely in video driver. This is not really recommended as it might result in display tearing, or skipping buffers or duplication of buffers etc. in display.

    Since the driver is getting blocked, I'm suspecting an issue w.r.t the driver. Ideally it should have taken the next frame available in the queue if its available or should have displayed the previous frame again.