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How To Config to use DM8168 HDCOMP(VGA)

shuisheng zhao
Prodigy 20 points


In our case,we want to use HDCOMP port on-chip, but we don't how to config it.

Best regards~

  • 0
    TI__Guru**** 483155 points

    Which application frame work are you using?

    In DVR-RDK, HDCOMP is by default enabled.

     

    Regards,

    Brijesh

  • 0 in reply to Brijesh Jadav
    Prodigy 20 points

    thank you very much for your reply, frist.

    i'm using DVR-RDK 04.00.00.03 right now.

    i have alread find out how to display video from HDCOMP, I modified some registers ,such as 0x48140894 0x48140898 and 0x48140724.

    but in our case , wo want to dispaly vedio in three defferent ways, HDMI, DVO2(off-chip HDMI), HDCOMP(tied to DVO2), SDTV. I've modifed usecase VSYS_USECASE_MULTICHN_HD_VCAP_VENC, shown below.

    it can not work, here some debug info:

    [m3vpss ]  5624: Assertion @ Line: 1134 in links_m3vpss/display/displayLink_drv.c: pObj->displayHndl != NULL : failed !!!

    is there something wrong, i need help.

    i'm looking forword to here you agine, by the way, my englisk is poor, may some mistakes up here, sorry.

    Regards,

    zhao. 

  • 0 in reply to shuisheng zhao
    TI__Guru**** 483155 points

    Hi zhao,

     

    In the diagram, it looks like input path is connected to the HDMI and HDCOMP, but you are trying to tie DVO2 and HDCOMP, this could cause display driver open to fail. You have to change the display controller try to connect input path correctly. Please refer to the links_m3vpss/system/system_dctrl_common.c file to get more about display controller tree.

     

    Regards,

    Brijesh