TDA4VM: GPU output image full screen mosaic

There is no PVR related printing in stdout. Please check the above log to see if the problem can be found, because the probability of occurrence in the product is very low. We are investigating whether it is a hardware problem.

Hello Li,

This is a new issue I have not seen before. Usually GPU issues are followed by PVR logs in the console. One good way to check this is to capture the input and output of the GPU to see if the scene came in distorted to the GPU or if the GPU is the culprit creating the bad output.

Do you have any details on how many units are showing this behavior?

Regards,

Erick

Hello, Eric,

We obtained the image before the GPU input，image not distorted。

There is no PVR related printing in stdout. the probability of occurrence in the product is very low. Less than ten motherboards have this problem.We would like to prioritize whether there is a hardware issue

Details：Between one to two hours of normal operation of the board, the appearance of the above image suddenly appears. During this period, you can switch views or execute 3D animations. it will automatically return to its normal display at random time.

There are logs we have collected on it. Do you need any other content？

Li,

Would you be able to capture a PVRCarbon of this activity? Instructions are here: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1218307/faq-how-can-i-analyze-a-gpu-graphics-process-unit-driver-or-hardware-issue

Last section describes it.

It will replicate the OpenGL calls, so we can see if the GPU is the culprit. If this does not work due to your implementation, we can look at alternatives.

Regards,

Erick

Erick,

I have obtained the information using the tool. Please help me check it,The file is linked below,thanks.

Link：pan.baidu.com/.../1piCA4sBlNiCRxegeCAAtVw
Extracted code：ykzr

Li,

I'm not able to access the image. Could you please upload it to the E2E ticket? It's available for upload on the Insert->Image/Video/file option

Then you click on the Upload button:

Thanks,

Erick

1007.main.out.pvrcbn.zip

Li,

Thanks. I'm getting errors reading back the contents of the file, but I believe it is a limitation on the tool itself. Let me check with our vendor and get back to you soon. And I'm checking if there are any other traces that might be useful.

Thanks,

Erick

Erick,

Okay, if you have any other way to obtain logs or other needs, please feel free to contact us at any time.

Thanks Li.

Li,

The traces that would be useful would be if the GPU reports an error, you'll see the debug output in the console.

But if this issue does not report an error, it indicates something else could be the issue. Do you know how reproduceable the error is? We will need to catch the error. If you have how long it usually takes to replicate, and how long it replicates, this would be valuable information.

Thanks,

Erick

Erick,

The occurrence of this error is quite random, usually it takes about three hours to run. When an error occurs, what error message will appear on the debugging platform? I can go and grab it when it appears.

Li,

The logs would occur on the console. But if they don't then the GPU driver does not indicate that it has hit an error.

Is this occurring on all platforms? Or just one?

Regards,

Erick

Erick,

Currently, less than ten have been found, and attempts have been made to call glFinish twice during the rendering process. This issue has not recurred at present

Li,

Interesting, calling glFinish() twice should not do anything, but I can check with our GPU vendor on this point if that should have any special effects.

Thanks,

Erick

Hi, Eric,
In the real car test, there was a flash screen problem. Help analyze why. thank you.

pvrlogdump_2311281512.txt.gz

Li,

Thanks for the logs, I'll get these analyzed and provide further instruction.

Regards,

Erick

Hi, Eric,

Today's test, there is a flower screen problem.The patch package added for this test. The name of the patch package is patch_11.13_PP131820_CL633615.tgz.
Help analyze the problem. thank you.

Flower screen front ：HWR Event Count：1
Flower Screen  ：HWR Event Count：2
Screen restoration  ： HWR Event Count：3

pvrlogdump_2312131613.txt.gz

Hello Li,

li daming said:

The patch package added for this test. The name of the patch package is patch_11.13_PP131820_CL633615.tgz.

Where did you get this patch? Are these pre-built GPU libraries provided by someone?

Regards,

Erick

Hi， Ercik

This the UM with patch for Baidu previous black display issue. Patch is PP131820_CL6336153_reduce_tiles_in_flight.patch. This patch fix the black display issue.

Link is below:

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1270364/tda4vm-gpu-performance-degradation-and-black-screen-issues/4816291?tisearch=e2e-sitesearch&keymatch=black%252520display#4816291

Regards

Zekun

Li, Zekun,

Understood.

Can you please run the following command before you start your application:

echo Y > /sys/kernel/debug/pvr/apphint/0/AssertOnHWRTrigger
pvrdebug -loggroups main,mts,cleanup,csw,bif,pm,rtd,spm,pow,hwr

Then, collect the pvrlogdump when you experience a hardware recovery. The first command will cause the GPU to freeze and save the firmware state when an issue occurs. That will provide us a snapshot and give us something to analyze.

Thanks,

Erick

Hi,Ercik

In the process of repetition avm does not have a Mosaic screen, but the screen continues to be black once. I have obtained the relevant log according to the method, please help analyze it.

Thanks.

debug_dump.logfirmware_trace.logstdout.txt

Li,

Thanks, I'm sharing these logs with the team for analysis. The black screen is expected as the FW is frozen using this method and no more GPU processing is handled.

Regards,

Erick

Hi Erick,

Any update here? 

BR,

Biao

Biao,

The logs were just sent yesterday. Please expect delays as the team in the US and in Europe that are looking into this might be on holidays.

Thanks,

Erick

Hello Biao,

This thread got locked, and the team has released some new updates to the GPU driver that might help this situation.

Is this still an issue?

Thanks,

Erick

Biao,

Closing this thread, please re-open or submit a new thread if you still need assistance.

Thanks,

Erick