TDA4VM-Q1: 3D Object Depth Error Issue when Porting OpenGL ES Graphics Program to TDA4VM

Hello, 

Could you share a PVRTune of the application? This will help us see what the GPU memory, bandwidth, and overall performance is at. You can find more information here:

https://developer.imaginationtech.com/solutions/pvrtune/

I will also consult our IP vendor to see if they are familiar with any limitations of the 8XE-series that could cause this. 

Dear Sarabesh Srinivasan,

Understood, we are awaiting your response concerning the GPU characteristics. We believe that configuration changes may be necessary for EGL and OpenGL ES, but we have not found the relevant documentation for the TDA4VM. If you have any information, please share it with us first.

Also, it will take us a few days to run PVRTune and share the results with you.

Thank you.

Best Regards,

Damon

Hi Damon, 

Could you provide a PVRDebug Dump when you are seeing this problem in object depth. You can find instructions to do that in this FAQ:  [FAQ] How can I analyze a GPU (Graphics Process Unit) driver or hardware issue? 

Additionally could you let me know if this is happening on custom hardware and whether this is reproducible on the EVM?

Thanks,
Sarabesh S.

Dear Sarabesh S.,

1. PVRDebug Dump is as follows.

PVRDebug_Dump_20251209.zip

2. The issue is occurring on the TDA4VM EVM board.

Best Regards,

Damon

Dear Sarabesh S.,

Are there any new developments?

Also, could you please confirm if there are any special configuration settings required for OpenGL ES and EGL programming on the TI GPU? For example, the ones I mentioned: EGL_DEPTH_SIZE, glDepthFunc(GL_LEQUAL), etc.

Best Regards,

Damon

Hi Damon, 

Yes, I have an ticket open with our IP vendor. After speaking with them earlier this week they suggested that the best course of action so they can replicate the GPU driver and OpenGL calls would be through getting a PVRCarbon of the issue. 

You can find the steps for getting a PVRCarbon in the last section of the FAQ I sent earlier:  [FAQ] How can I analyze a GPU (Graphics Process Unit) driver or hardware issue? 

If you share this then we can certainly determine what is causing this issue.

Thank you,

Sarabesh S.

Hi Sarabesh,

We provide reproduce procedure and software package offline and you can see the symptom on top of TI EVM and SDK.

Please cowork with team to make progress.

Hello James, 

Thank you for providing steps to reproduce on the EVM. I will replicate and share this with our IP vendor. I'll keep you updated with any findings.  

Hello James,

Got a PVR Carbon to our IP Vendor who has passed this information to their engineering team. There are no DDK errors that are being produced so more investigation is ongoing to discuss what is attributing the depth quality.

Thank you for your patience, I will continue to keep you updated.

I am wondering have you been able to reproduce this issue on a newer DDK and SDK version? Are you seeing this is 11.x? Lots of issues get resolved between DDK releases so you may have a better result when using a newer SDK.

Regards,
Sarabesh S.