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DM385 Display question

han wei
Intellectual 650 points
Other Parts Discussed in Thread: DM385

hi all

  I have a problem about use DM385. we use software is IPNC_RDK_3_8.

1.if we insmod vpss.ko use args "mode=hdmi:1080p-60"  I can not display 720P on hdmi port. (The link is nullsrc -> display) But DM8168 can do this. I had check the reg of HD-ENC value. all of the value is same of when inmod vpss.ko use args "mode=hdmi:720p-60" . So where is wrong? why can not output 720P on hdmi when insmod vpss.ko use "mode=hdmi:1080p-60"?

 

2. is dm385 can tri-display some time with different resolution.(eg: hdmi 1920x1080@60 hdcomp:1280x720@60 cvbs:720x480@60)

 

thank you very much~

  • 0
    TI__Guru**** 476655 points

    Yes, possible to have tri display with different resolution, but only on HDMI, Vout0 and cvbs output. hdcomp output has to be tied with one of the other display.

     

    Rgds,

    Brijesh

     

  • 0 in reply to Brijesh Jadav
    Intellectual 650 points
    hi Brijesh
    thank you for your reply~
  • 0
    TI__Guru**** 170625 points

    Hi Han Wei,

    han wei said:
    1.if we insmod vpss.ko use args "mode=hdmi:1080p-60"  I can not display 720P on hdmi port. (The link is nullsrc -> display) But DM8168 can do this. I had check the reg of HD-ENC value. all of the value is same of when inmod vpss.ko use args "mode=hdmi:720p-60" . So where is wrong? why can not output 720P on hdmi when insmod vpss.ko use "mode=hdmi:1080p-60"?

    In DM814x, PSP comes up with 1080p60 for hdmi by default ($ insmod vpss.ko mode=hdmi:1080p-60). If mode is not assigned during the boot time, driver uses the following mode: hdmi: 1080p-60, hdcomp: 1080i-60, dvo2:1080p-60, sd:ntsc.

    For switch to 720p, you should modify this as:

    $ insmod vpss.ko mode=hdmi:720p-60

    See the below wiki page for more info:


    Regards,
    Pavel