PDF-Document "i.MX 6 Graphics User’s Guide, Rev. 0, 06/2016" is in Yocto "fsl-yocto-L4.1.15_1.2.0-ga" directory "doc".
In chapter 4.2.2, page 31 there is the environment variable
with following description (only a part of it):
- If set to 2 or 3, VSYNC is enabled and there are double or trible frame buffer. Because of the hardware limitation of current IPU, there may be tearing on screen.
- If set to 4 or more, VSYNC is enabled and no screen tearing appears.
A question on this note: "Because of the hardware limitation of current IPU, there may be tearing on screen."
What are these limitation mentioned here? And why are the limitation away, when 4 or more frame buffers are used?