This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SK-TDA4VM: Not able to detect display after SDK build

Part Number: SK-TDA4VM

Hi,

I have built the SDK for TDA4VM-SK and am trying to run the demos on it. The board boots up and I am able to login as root. But it does not detect the display. I have attached an HDMI display to the board. When I try to run modetest to see the connector number for the display, it shows and error, "failed to open device 'tidss': No such file or directory ".

I was able to run demos and see the output on the monitor with the pre-built etcher image provided by TI. I have used the following to built the SDK.

Linux SDK version: j7-evm-08_02_00_04

RTOS SDk version: j721e-evm-08_02_00_06

Attached here is the log when I try to run the image classification demo.

:/opt/edge_ai_apps/apps_python# ./app_edgeai.py ../configs/image_classffication.yaml

Number of subgraphs:1 , 34 nodes delegated out of 34 nodes

APP: Init ... !!!
MEM: Init ... !!!
MEM: Initialized DMA HEAP (fd=5) !!!
MEM: Init ... Done !!!
IPC: Init ... !!!
IPC: Init ... Done !!!
REMOTE_SERVICE: Init ... !!!
REMOTE_SERVICE: Init ... Done !!!
1251.658313 s: GTC Frequency = 200 MHz
APP: Init ... Done !!!
1251.661773 s: VX_ZONE_INIT:Enabled
1251.661800 s: VX_ZONE_ERROR:Enabled
1251.661805 s: VX_ZONE_WARNING:Enabled
1251.665979 s: VX_ZONE_INIT:[tivxInitLocal:130] Initialization Done !!!
1251.666167 s: VX_ZONE_INIT:[tivxHostInitLocal:86] Initialization Done for HOST !!
[GST SRC STR]
[FLOW 0]
multifilesrc location=/opt/edge_ai_apps/data/images/%04d.jpg loop=true caps=image/jp
split_01. ! queue ! video/x-raw, width=454, height=256 ! tiovxdlcolorconvert out-poo
split_01. ! queue ! video/x-raw, width=1280, height=720 ! tiovxdlcolorconvert target

[GST SINK STR]
appsrc format=GST_FORMAT_TIME is-live=true block=true do-timestamp=true name=post_0
tiovxmosaic name=mosaic_0 background=/tmp/background_0
sink_0::startx=320 sink_0::starty=180 sink_0::width=1280 sink_0::height=720
! video/x-raw,format=NV12, width=1920, height=1080 ! kmssink sync=false driver-name=

[ERROR] Could not open DRM module tidss
1251.966568 s: VX_ZONE_ERROR:[vxGetStatus:713] Reference is NULL
1251.967282 s: VX_ZONE_INIT:[tivxHostDeInitLocal:100] De-Initialization Done for !
1251.971635 s: VX_ZONE_INIT:[tivxDeInitLocal:193] De-Initialization Done !!!
APP: Deinit ... !!!
REMOTE_SERVICE: Deinit ... !!!
REMOTE_SERVICE: Deinit ... Done !!!
IPC: Deinit ... !!!
IPC: DeInit ... Done !!!
MEM: Deinit ... !!!
MEM: Alloc's: 15 alloc's of 42619424 bytes
MEM: Free's : 15 free's of 42619424 bytes
MEM: Open's : 0 allocs of 0 bytes
MEM: Deinit ... Done !!!