I do not enter in HSYNC interrupt DCIM STM32H743

[esukh]

I want to fetch video data from camera via decoder (TVP5150AM1) through DCIM.

I configure decoder to output 4:2:2 8-bit YCbCr video with discrete synchronization and I do not get HSYNC interrupt,

DCMI->IER |= (0x1 << 4) | (0x1 << 0);

so, first time when I enter into the interrupt routine my DMA->NDTR register is already 0x0, what means that I filled up full buffer already, when I expect get HSYNC interrupt after ~760 data transfers.

What do I do wrong?