writeback_chunk_size
v->writeback_dram_clock_change_watermark = v->dram_clock_change_latency + v->write_back_latency + v->writeback_chunk_size * 1024.0 / 32.0 / v->socclk;
.writeback_chunk_size = 2, /*kbytes*/
dc->dcn_ip->writeback_chunk_size,
dc->dml.ip.writeback_chunk_size_kbytes = dc->dcn_ip->writeback_chunk_size;
v->writeback_chunk_size = dc->dcn_ip->writeback_chunk_size;
float writeback_chunk_size;
int writeback_chunk_size; /*kbytes*/
write_chunk = writeback_chunk_size(inode->i_sb, wb, work);