iMX6Q GPU issue with 1GB DDR3(64Bit interface) - LTIB 4_0_0

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iMX6Q GPU issue with 1GB DDR3(64Bit interface) - LTIB 4_0_0

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dilip
Contributor II

Hi,

We are trying to run OpenGL QT examples and GPU tests in unit_tests folder on i.MX6Q based custom board all following are the images rendered on screen.

QT OpenGL test output is shown below(Run examples/opengl/hellogl_es2/hellogl_es2)

and running gpu test(./unit_tests/gpu.sh) gives following output

Both these test run fine on SABRE AUTO board. The main change in custom board is DDR. Following are the DDR connection details

Total DDR Size : 1Giga Byte

No of chips :  4(256 MB each)

Following is DDR3 interfacing diagram,

ddr3_connection.jpg

I referred following post in community  and settings looks okay

Re: Vivante and opengl broken on imx6 board

Any idea about what is going wrong?

Regards,

Dilip

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tomasznowak
Contributor II

Hello Dilip,

please verify DRAM configuration using DDR_Stress_Tester_V0.042.zip mentioned in this post on i.MX6S custom board, 32-bit mode, Booting hangs at Kernel loading..

Best regards

Tomasz

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dilip
Contributor II

Another thread which discuss about the same issue is imx6q GPU issues.

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YixingKong
Senior Contributor IV

Dilip

Since other thread discussed this issue, I will close this one.

Thanks,

Yixing

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dilip
Contributor II

Hello Tomasz,

Did DDR stress test. Test is passing without any issues. Ran test iteration till 17 and it runs fine without any issues.

Other hardware change is the display. We are using 1280*800 display with RGB24 interface over LVDS. Is there a display resolution related settings to be done for GPU to work?

Best Regards,

Dilip

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