TDA4VH-Q1: edp display not working

Hi,

If the logo is displayed, then display is working fine.. isn't it? Which demo are you running? Also are you using RTOS SDK or Linux SDK? 

Regads,

Brijesh

Hello Brijesh,

The logo is not displaying now with the same sd card untouched. That's what our query is now.

Please refer the below logs, it might be useful.

j784s4-evm login: root
[   20.919942] kauditd_printk_skb: 8 callbacks suppressed
[   20.919950] audit: type=1006 audit(1709055080.360:16): pid=1129 uid=0 old-auid=4294967295 auid=0 tty=(none) old-ses=4294967295 ses=3 res=1
[   20.937552] audit: type=1300 audit(1709055080.360:16): arch=c00000b7 syscall=64 success=yes exit=1 a0=8 a1=ffffdcbf0488 a2=1 a3=1 items=0 ppid=1 pid=1129 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=3 comm="(systemd)" exe="/usr/lib/systemd/systemd-executor" key=(null)
[   20.964103] audit: type=1327 audit(1709055080.360:16): proctitle="(systemd)"
[   20.971180] audit: type=1334 audit(1709055080.376:17): prog-id=18 op=LOAD
[   20.977983] audit: type=1300 audit(1709055080.376:17): arch=c00000b7 syscall=280 success=yes exit=8 a0=5 a1=ffffdfb31e08 a2=90 a3=0 items=0 ppid=1 pid=1129 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=3 comm="systemd" exe="/usr/lib/systemd/systemd" key=(null)
[   21.003757] audit: type=1327 audit(1709055080.376:17): proctitle="(systemd)"
[   21.010810] audit: type=1334 audit(1709055080.380:18): prog-id=18 op=UNLOAD
[   21.017774] audit: type=1300 audit(1709055080.380:18): arch=c00000b7 syscall=57 success=yes exit=0 a0=8 a1=1 a2=0 a3=ffff9a217c60 items=0 ppid=1 pid=1129 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=3 comm="systemd" exe="/usr/lib/systemd/systemd" key=(null)
[   21.043378] audit: type=1327 audit(1709055080.380:18): proctitle="(systemd)"
[   21.050434] audit: type=1334 audit(1709055080.380:19): prog-id=19 op=LOAD
root@j784s4-evm:~# r[   22.734396] cdns-mhdp8546 a000000.bridge: invalid resource (null)
[   22.740505] cdns-mhdp8546 a000000.bridge: Failed to get SAPB memory resource, HDCP not supported
[   22.749297] cdns-mhdp8546 a000000.bridge: no PHY configured
[   22.754936] platform connector-dp0: deferred probe pending
[   22.760416] platform regulator-dp0-prw: deferred probe pending
[   22.766241] platform regulator-dp1-prw: deferred probe pending
[   22.772064] platform a000000.bridge: deferred probe pending
oot
-sh: root: command not found
root@j784s4-evm:~#

Thanks & Regards,

Hariprakash Raja

Hello Brijesh,

Need quick support here. Thank you for your cooperation.

Thanks & Regards,

Hariprakash Raja

Hello Brijesh,

[FAILED] Failed to start Start psplash boot splash screen.
See 'systemctl status psplash-start.service' for details.
[DEPEND] Dependency failed for Start psplas…temd progress communication helper.

root@j784s4-evm:~# systemctl status psplash-start.service
x psplash-start.service - Start psplash boot splash screen
     Loaded: loaded (/usr/lib/systemd/system/psplash-start.service; enabled; preset: enabled)
     Active: failed (Result: exit-code) since Tue 2024-02-27 17:26:08 UTC; 1min 24s ago
    Process: 616 ExecStart=/usr/bin/psplash (code=exited, status=255/EXCEPTION)
   Main PID: 616 (code=exited, status=255/EXCEPTION)
        CPU: 16ms

Feb 27 17:26:08 j784s4-evm systemd[1]: Starting Start psplash boot splash screen...
Feb 27 17:26:08 j784s4-evm psplash[616]: Error opening /dev/fb0
Feb 27 17:26:08 j784s4-evm systemd[1]: psplash-start.service: Main process exited, code=exited, status=255/EXCEPTION
Feb 27 17:26:08 j784s4-evm systemd[1]: psplash-start.service: Failed with result 'exit-code'.
Feb 27 17:26:08 j784s4-evm systemd[1]: Failed to start Start psplash boot splash screen.
root@j784s4-evm:~#

Could you please check these logs also?

Hi,

But are you using display from rtos? Have you enabled vision apps dtb file?

Regards,

Brijesh

Hello Brijesh,

By referring a forum ticket I tried to comment some lines in vision apps dtso file. I got some background pic like this I have attached. And in app_cfg_mcu2_0 single_dss is defined. But when I tried to run vision_apps run_app_tidl.sh, it is hanging in between. It is waiting for display. Could you please tell me I'm on the correct path? My need is to check the default vision apps output in the display. I'm using sdk 10.00

Hi,

Could you please first decide which demo you want to run and this decides which core controls Display? If you want to run TIDL demo, please dont change vision apps dtb and mcu2_0 firmware. In this case, you will not see any background images from Linux, but you would see output from the TIDL demo.. 

Please note only one core can control display either Linux or R5F, not both. When using RTOS SDK, display is controlled by R5F and disabled in Linux dtb file. But in Linux SDK, display is controlled by Linux and so we cannot use/run TIDL like demos, which are available in RTOS SDK. 

Regards,

Brijesh 

Hello Brijesh,

Actually I need to use Linux+Rtos. So are you telling to build sd card from rtos sdk right? So that it'll work. But we tried that. We got nothing in the display, but demo application was running fine. 

But have you disable Display from Linux? essentially, have you used released vision apps dtb file? 

Regards,

Brijesh

Yes initially I was using default only. But as soon as I didn't get display, I changed and checked. Exactly where I can disable display in linux? 

Hello Brijesh,

I want to run tidl demos with display in r5f. Can you please guide me here? Or can we have a quick call and sort this out? It will be more helpful.

Thanks & Regards,

Hariprakash Raja

Hi,

Can you follow the steps mentioned on below link? there is no other change required. The steps also mention how to create SD card, how to flash filesystem and kernel into it and how to build vision apps and copy binaries into it.. 

Vision Apps User Guide: Build and Run

Regards,

Brijesh

Hello Brijesh,

I followed all the steps as it is and built the sd card. And tried to run the vision_apps, demo applications are running fine but I can't see the output in the display. I've attached the logs here. Please cross check and guide here.

Thanks & Regards,

Hariprakash Raja

Vision_apps_logs.txt

Hi Brijesh,

I referred this forum
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1393878/processor-sdk-j784s4-vision-apps-not-displaying-output-on-processor-sdk-j784s4-9-2?tisearch=e2e-sitesearch&keymatch=display%20vision%20apps#

I'm using Lenovo G32qc-30. Is there any patch need to be applied for this display or will it work directly?

I'll also try to change the monitor and check.

Thanks & Regards,

Hariprakash Raja

ok, as such it should work with monitor support standard 1080p 60fps display, but sure lets check with different monitor.

Regards,

Brijesh

Hello Brijesh,

After changing the monitor to Dell E2715Hf,  tidl demos started displaying on the monitor. Thanks for your support.

Thanks & Regards,

Hariprakash Raja