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J721EXCPXEVM: Is there a way to configure the resolution and refresh rate of the monitor connected to the display port 0 of the board

Arpan Dutta
Prodigy 60 points
Part Number: J721EXCPXEVM
Other Parts Discussed in Thread: SK-TDA4VM

Tool/software:

Hi Team,
Is there a way to configure the resolution and refresh rate of the monitor connected to the display port 0 of the board.

I checked the /etc/xdg/weston/weston.ini file, it shows outputs for LVDS1, VGA1 and X1 and all of them commented out. But no mention of any display port output.


#[output]
#name=LVDS1
#mode=1680x1050
#transform=90
#icc_profile=/usr/share/color/icc/colord/Bluish.icc

#[output]
#name=VGA1
#mode=173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
#transform=flipped

#[output]
#name=X1
#mode=1024x768
#transform=flipped-90

Kindly help.

Regards,
Arpan

  • 0
    TI__Mastermind 40203 points

    Hi Arpan,

    Here are some useful commands to figure out what can be put into weston.ini.

    1. kmsprint - This will print out the connector name and mode that is currently being used.
      1. For example, for me the name of DP connection comes up as DP-1
      2. Mode comes up as 1920x1080@60.00
    2. modetest -M tidss - This will print out what modes are supported

    With this, I can do something like the following in weston.ini file to change resolution and refresh rate:

    [output]
    name=DP-1
    mode=800x600@60.32

    As a note, it looks like to set refresh rate, it has to match what prints out in "modetest -M tidss" exactly to the decimal place. Otherwise, if you put just 800x600 or some other supported resolution without refresh rate, it will pick the first mode line that supports this resolution, so refresh rate may not be what you desire.

    An additional note, I tried with SK-TDA4VM since that was what I had on-hand, but the same process should apply to J721EXCPXEVM as well.

    Regards,

    Takuma