EGL eglCreateWindowSurface issue 3.14.28

[aznjaput]

Hello,

I am using kernel 3.14.28 on an imx6q. I did bitbake fsl-image-multimedia with the fb backend. I have two almost identical boards, one with an LVDS display and one with a parallel display. On the LVDS board, the display is connected to LVDS0. When I run the OpenGL test app located in /opt/fsl-gpu-sdk/GLES2/S01_SimpleTriangle, the application runs successfully and is displayed on the LVDS display. This works as expected.

Now before I put the same fsl-image-multimedia image on the board with a parallel display, I modified just the .dtsi file to use the parallel display instead of the LVDS display. The parallel display is connected to IPU1_DISP1. When I power up this board, I get the console output on the parallel display, which is good. Then when I run the same OpenGL test app, I get the following error:

ERROR: demo setup failed with: eglCreateWindowSurface(m_hDisplay, m_hConfig, hWindow, nullptr) failed with error code 12291 at source/FslDemoHostEGL/EGLDemoHost.cpp(473)

As I debug the app, for fb backend there are calls to fbGetDisplayByIndex() and fbCreateWindow(). I can't seem to find the source code for these functions, so I can't debug these functions.

Does anyone have an idea how I can get the OpenGL test app to work on the parallel display board? I use fb0 on both boards. Any help is much appreciated.

imx6q

kernel: 3.14.28

Galcore version 5.0.11.25762

fb backend

bitbake fsl-image-multimedia

Thanks,

[Bio_TICFSL]

Hi aznjaput,

You need to upgrade to 3.14.38 kernel based bsp, that includes vivante driver 5.0.11p7.1 that Includes many of the fb backend bug fixes and stability improvements.

fsl-image-multimedia is not tested on Fsl yocto official release.

Regards

[aznjaput]

Hi Bio,

Thanks for the suggestion, I appreciate it. However, updating to a 3.14.38 kernel with the latest vivante driver did not fix the issue, I still get the same eglCreateWindowSurface() error.

Thanks to JustinWaters​, he was able to solve the issue for me. I am currently using a 24bit parallel display, so in the .dtsi file inside fb@0, I set the default_bpp to 24. This needs to always be 16 regardless of the display. So I set default_bpp to 16 and I no longer get eglCreateWindowSurface() errors anymore!

Thanks,

[jparrish88]

Hi Bio,

Thanks for your feedback.

What recommendation would you give for the community based BSP?

Currently, the Nitrogen6x BSP is being used for a custom NIT6X look-a-like board.