dm_vert
input->src.source_scan = dm_vert;
access_dir = (e2e_pipe_param.pipe.src.source_scan == dm_vert); /* vp access direction: horizontal or vertical accessed */
bool surf_vert = (pipe_src_param.source_scan == dm_vert);
bool surf_vert = (source_scan == dm_vert);
surf_vert = (pipe_src_param.source_scan == dm_vert);