PROCESSOR-SDK-AM68: Boot Problem

Hi, any updates on this? On the side I managed to boot the board but now I'm not able to see any output on the connected HDMI monitor. Is there a good reference on this issue as well?

-Robert

Hi Robert,

Regarding booting the board (glad you are able to boot), are you able to just use minicom separately and forego the setup.sh script? I personally use picocom to connect to my board.

For the HDMI monitor, can you send me the dmesg log as well as the outputs for the following commands:

dmesg | grep -i hdmi
dmesg | grep -i deferred
dmesg | grep -i dss
modetest -M tidss
kmsprint
kmstest

Best,
Jared

Hi Jared,

Here are tho outputs I get:

root@am68a-sk:/opt/edgeai-gst-apps# dmesg | grep -i hdmi
[    0.335106] platform connector-hdmi: Fixed dependency cycle(s) with /bridge-dvi
[    0.349842] platform bridge-dvi: Fixed dependency cycle(s) with /connector-hdmi

root@am68a-sk:/opt/edgeai-gst-apps# dmesg | grep -i dss     
[    0.297446] platform 4800000.dsi: Fixed dependency cycle(s) with /bus@100000/ds0
[    0.317121] platform 4800000.dsi: Fixed dependency cycle(s) with /bus@100000/ds0
[    0.325430] platform 4a00000.dss: Fixed dependency cycle(s) with /bus@100000/ds0
[    0.342617] platform 4a00000.dss: Fixed dependency cycle(s) with /bridge-dvi
[    0.357350] platform bridge-dvi: Fixed dependency cycle(s) with /bus@100000/dss0
[    9.129794] [drm] Initialized tidss 1.0.0 20180215 for 4a00000.dss on minor 1
[    9.569000] tidss 4a00000.dss: [drm] fb0: tidssdrmfb frame buffer device

root@am68a-sk:/opt/edgeai-gst-apps# kmsprint
Connector 0 (40) HDMI-A-1 (disconnected)
  Encoder 0 (39) NONE
    Crtc 0 (38) 1920x1080@60.00 148.500 1920/88/44/148/+ 1080/4/5/36/+ 60 (60.08
      Plane 0 (31) fb-id: 65 (crtcs: 0 1) 0,0 1920x1080 -> 0,0 1920x1080 (AR12 )
        FB 65 1920x1080
Connector 1 (50) eDP-1 (disconnected)
  Encoder 1 (49) NONE

root@am68a-sk:/opt/edgeai-gst-apps# kmstest                                     
Connector 0/@40: HDMI-A-1                                                       
  Crtc 0/@38: 1920x1080@60.00 148.500 1920/88/44/148/+ 1080/4/5/36/+ 60 (60.00)8
  Plane 0/@31: 0,0-1920x1080                                                    
    Fb 66 1920x1080-XR24                                                        
press enter to exit

dmesg | grep -i deferred does not give any output

For some reason it shows the HDMI is disconnected, but it is physically connected. I used the same display with a RPI5 and a Beagley-ai and they are both able to drive the display!

Thanks,

Robert

I tried it with another display I bought and it's able to drive it with no issues. This other one that's not working is a larger 27'' display that has it's own power supply.

Thanks,

Robert

Hi Robert,

It's strange that the device is enumerating but is showing as disconnected. Can you send the non-functioning display's product name as well as your full dmesg logs?

Best,
Jared