AnsweredAssumed Answered

display picture on screen is too slow

Question asked by Azmat Liu on Oct 9, 2018
Latest reply on Oct 17, 2018 by Azmat Liu

my bsp version is L4.1.15-2.1.0-Ga and disto configuration is fsl-imx-fb.


I am trying to display a picture to my LCD panel and find that when I memcpy picture pixel data to framebuffer0  it take nearly 4s to display it on screen  while it will take less than 1.5s on framebuffer1.Then I look up some guides and find out that framebuffer0 is background plane but framebuffer1 is foreground plane,framebuffer use IDMAC's channel 23 but framebuffer1 user channel 27.I don't know if these difference influence the delay or not.

So I come here to ask for help:

   why it take so much time to display pixel date to lcd after I put picture data on fb0? Can it be faster?How to?




any advice is welcome