HBP
mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->back_porch << HBP,
dpi->conf->dimension_mask << HBP);
pTiming->HST + (pTiming->HBP - margins) + HLeftBorder +
(pTiming->HST + (pTiming->HBP - margins) + xRes +
pTiming->HST + (pTiming->HBP - margins) + HLeftBorder;
var->left_margin = par->HBP;
par->HBP = info->var.left_margin;
par->HTot = par->XRES + par->HBP + par->HST + par->HFP;
u32 HBP; /* Hor Back Porch */