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Display frame-rate control

ranchu
Guru 20755 points

Hello,

I would like to understand how we can configure the frame rate of display (with Links API) ? I tried to find in the code, but didn't.
I actually refer to the following passage from HDVPSS USER'S GUIDE:
"As shown in the figure, display driver controls configuration of VCOMP, CIG, EDE (TI816X only), CPROC (TI816X only), CSC, COMP and all the VENCs. It also configures the muxes to enable/disable the different paths to a particular VENC. It provides APIs to the application to configure these paths and to set the different frame rates and resolutions in the VENC. The display controller will provide necessary information to the display driver about the resolution and frame rate that it has to  operate. This is abstracted from the application."

 Best Regards,

Ran

  • 0
    TI__Guru**** 475345 points

    Hi Ran,

     

    Please go through the system link, you will get the idea about how resolution is configured. It uses display controller to configure display output.

     

    Thx,

    Brijesh 

  • 0 in reply to Brijesh Jadav
    Guru 20755 points

    Hi Brijesh,

    System Link initialize display controller with the standard resolutions as listed in fvid2.h.
    In my case all video goes out to vout0 and vout1. I would like to ask if you can give me some directions as to what changes should be made in hdvpss firmware in order to support new resolution in vout0 and vout1.

    Regards,

    Ran

  • 0 in reply to ranchu
    TI__Guru**** 475345 points

    Hi Ran,

     

    There is an interface supported in the display controller to cofigure output for the custom resolution. Please go through the user guide to know about this interface.

    Do you want to change the output resolution dynamically? This is not supported, you need to stop the display and then only you can change the resolution.

     

    Thx,

    Brijesh

  • 0 in reply to Brijesh Jadav
    Guru 20755 points

    Hi Brijesh,

    I don't need to change display dynamically. I need to support custom resolution for example:
    720x576    59.94 fps
    1280x720 59.94 fps
    960x576    25  fps     and more.
    I searched in HDVPSS user's guide for custom interface or custom resolution, but found none.

    Regards,

    Ran