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Partial framebuffer SPI LCD best tearing effect strategy?

MM..1
Chief II

I ask about G071 exampke code, but nobody replies, then i try use more specific question. My test display is round 240x240 SPI LCD. TE signal is fmark .(one pulse per frame)

In partial or block window send method RAM in display is updated on random places.

TE signal define start or end controller work. Without any logic controll i can see tearing on display , but used 45MHz SPI set it to relative invisible.

But i ask where is example , that handle this better, i mean line timer counter is required and compare possition of RAM reading and writing....

Pls info

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