Using DVI Output on DM365Leopard

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An accessory for the LeopardBoard 365 allows you to generate video in DVI format. Attach the LI-DVI1 module to J7, the Parallel RGB (PRGB) port, to add a DVI port to your LeopardBoard.

Dm365 leopard dvi module 2.JPG


Configuration

DVI configuration is achieved after three basic steps, done using the RidgeRun's SDK configuration tool, which can be run using:

cd $DEVDIR
make config

1) Make sure that the dm365_generic_prgb_encoder is selected. This can be enabled at:

Kernel configuration -> Device Drivers -> Multimedia support -> Video capture adapters -> Generic PRGB Encoder support 
Dvi config 1.png

2) Set the video output to PRGB, then choose the max DVI resolution size that is required (480P, 720P, 1080I).

Architecture configurations -> Video Output (PRGB)
Architecture configurations -> Maximum Video Output Buffer Size    
Dvi config 2.png

3) Add an extra parameter to the kernel command line, which in the kernel configuration is called an extram kernel argument:

Kernel configuration -> Extra kernel arguments   
Dvi config 3.png

Add the PRGB parameter that will be used by the kernel to set the mode.

A couple examples of include:

dm365_generic_prgb_encoder.mode=1280x720MR-16@60

or

dm365_generic_prgb_encoder.mode=720x480MR-16@30

Test pipelines

Test pipelines (works with dm365_generic_prgb_encoder.mode=1280x720MR-16@60)

Test Pipeline for videotestsrc to DVI output:

gst-launch videotestsrc ! TIDmaiVideoSink videoStd=PRGB

Test pipeline for 5Mp Camera to DVI output

gst-launch v4l2src chain-ipipe=true always-copy=false ! "video/x-raw-yuv,format=(fourcc)NV12, width=1280,height=720,framerate=(fraction)23/1" ! dmaiaccel ! TIDmaiVideoSink videoStd=PRGB sync=false enable-last-buffer=false


Pipeline reading mp4 file (720P)

Reserved memory from DVSDK: 0x4300000

Reserved memory for CMEM: 0x3500000


Modify pipeline location as needed

gst-launch -e -v filesrc location= /MEDIA/GRAlpha_Full.mp4 ! tee name=mp4_vid ! queue ! qtdemux ! 'video/x-h264, width=(int)1280, height=(int)720' ! tee name=h264_vid ! queue ! dmaidec_h264 numOutputBufs=22 ! 'video/x-raw-yuv, format=(fourcc)NV12, width=(int)1280, height=(int)720' ! queue ! dmaiperf print-arm-load=true ! TIDmaiVideoSink videoOutput=DVI videoStd=720P_60


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