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SaLoopBack alignment\offset of live image issue

Alexander Fagrell
Prodigy 65 points
Other Parts Discussed in Thread: TVP7002

Hello!

We have connected our 1920p60 camera (component) to our board TI8148 EVM. From the board we use the HDMI as output to a monitor. Running the SaLoopBack works good, however it seems like the live image is a bit offset to the left, see image below (there is a black strip to the right). 

It is only visible if the monitor's aspect ratio is set to underScan. We've also connected the device to a PC with a framegrabber to verify we don't have the black stripe there (not a camera issue).

Has anyone else encountered this issue and have any ideas how to solve it? 

We are using the V4L2 firmware brought by the ezsdk package version 5.05.02.00. 

Thanks! 

  • 0
    TI__Guru* 80190 points

    Hello,

    Could you check the settings of the monitor, is the input select  is it set to hdmi (PC or AV)?

    Could you check with other monitor?

    BR

    Margarita

  • 0 in reply to Margarita Gashova
    Prodigy 65 points

    HI Margarita,

    The image attached in the first post is saved directly from the buffer hence the issue is independent of monitor. We've tried before with different monitors and the black bar is still there

    Now I'm thinking of changing the duration (or any other parameter?) in the tvp7002 driver. We could adjust the vertical alignment by changing the following registers;
    TVP7002_VBLK_F_0_START_L_OFF, 
    TVP7002_VBLK_F_0_DURATION
    for different resolutions,
     
    However, I couldn't find a way to adjust the horizontal adjustment, can you please advice?

    Thanks!