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OMAP DSS V4L Device Nods

Sebastian Kruber
Intellectual 690 points


Hello everybody!

I am working on my filesystem build with buildroot. Everything works fine so far.... except no v4l device nods for the omap dss are created (/dev/video1 and /dev/video2).

I am using kernels 2.6.28 and 2.6.29. Both compiled including omapfb and v4l2. udev also works fine - all (other) device nods are created, even one for my virtual v4l2 device (/dev/video0).

Is there something special about the omap v4l2 access? Do I have to modify udev or something else, so that the device nods will appear?

Best regards

Sebastian

  • 0
    Intellectual 690 points

    Hello Sebastian!

    When you look at the PSP UserGuide, you will find the answer witten under the kernels configuration:

    Select OMAP2/3 Frame buffer support (EXPERIMENTAL) and 1 as Number
    of Frame buffers. Select 1 will allow the Graphics pipeline of the DSS to be
    controlled by FBDEV interface and both video pipelines by V4L2 interface.
    Selecting 2 will allow graphic pipeline and 1 video pipeline to be controlled
    by FBDEV interface and one video pipeline by V4L2 interface. Selecting 3
    will allow all the three DSS pipelines to be controlled by FBDEV interface.

    Cheers, Sebastian