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imx6q gpu perference while dual display

Question asked by jie jia on Oct 14, 2018
Latest reply on Oct 28, 2018 by jie jia

There are two screen in our board. One is hdmi(1280x1024P-60 32bpp), another is lvds(1280x1024P-60 32bpp).  We enable dual frame buffer in rootfs by export FB_MULTI_BUFFER=2. We use 'eglNativeDisplayType = fbGetDisplayByIndex(x);' to render  to /dev/fb0 and /dev/fb2. 

 

(1)When we  render a  rotating texture to anyone of the screen, it's smooth(EGL_WIDTH=1280 and EGL_HEIGHT=1024). 

(2)When we  render a  rotating texture to the two screen through two process, it's smooth(EGL_WIDTH=1024 and EGL_HEIGHT=1024). 

(3)When we  render a  rotating texture to the two screen through two process, it is not smooth especially /dev/fb2(EGL_WIDTH=1280 and EGL_HEIGHT=1024). 

What's wrong with the resolution of 1280*1024 while dual display?

 

 

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