discard_buffer
struct mxc_isi_dma_buffer discard_buffer[MXC_MAX_PLANES];
struct mxc_isi_dma_buffer *buf = &video->discard_buffer[i];
struct mxc_isi_dma_buffer *buf = &video->discard_buffer[i];
buf->dma_addrs[j] = video->discard_buffer[j].dma;
discard_buffer(bh);