fill_px
fill_px(&desc->px, dst, src, len);
fill_px(&desc->px, dst, src, period_len);
fill_px(&desc->px, pch->fifo_dma, sg_dma_address(sg),
fill_px(&desc->px, sg_dma_address(sg), pch->fifo_dma,
fill_px(pt, vm->scratch[lvl]->encode);
fill_px(obj, vm->scratch[i - 1]->encode);
fill_px(pde, vm->scratch[1]->encode);
fill_px((px), v__ << 32 | v__); \