Screen tearing on i.MX6 Quad SABRE board

[florinmaticu]

Hello,

I have an application based on the EGL framebuffer API and there is a "screen tearing" effect while running it.

I also have the  FB_MULTI_BUFFER variable set to 2. Setting a value of 3 doesn't make a difference. Also setting a value higher then 4 shows a black screen.

Any suggestions?

Thank you !#

Board: i.MX 6Quad SABRE Development Board|NXP 

Board support package :   Linux 4.9.11_1.0.0 BSP

[florinmaticu]

We have checked the test applications and we are facing an  issue with vivante library and our chromium browser running on Sabre SD iMX6QP. Worth to mention that we are using a custom Ozone EGL layer based on vivante framebuffer lib (see code here https://github.com/airtame/ozone-egl/tree/libchromiumcontent_51).

When setting the FB_MULTI_BUFFER to 2 the browser starts and we see artifacts being displayed on the screen. See attached picture.

When setting FB_MULTI_BUFFER to 4 the browser hangs when vivante’s calling eglSwapBuffers  function  (see in the attached logs Thread 16). See the attached stack trace: https://community.nxp.com/servlet/JiveServlet/download/467915-1-422025/chromium-main-process-stack-t... 

Our environment:

Linux OS : 4.9.11

Vivante libraries : 6.2.2

I also attached EGL trace collected by apitrace when  FB_MULTI_BUFFER is set to 2. We could not retrieve the ones when FB_MULTI_BUFFER is set to 4. https://community.nxp.com/servlet/JiveServlet/download/467915-1-422026/sprocket.fb0.trace.zip 

[igorpadykov]

Hi floarian

please try demo images

https://www.nxp.com/webapp/Download?colCode=L4.9.11_1.0.0_MX6QDLSOLOX&appType=license&location=null 

Best regards
igor
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