dmm_read
r = dmm_read(dmm, reg[PAT_STATUS][engine->id]);
u32 status = dmm_read(dmm, DMM_PAT_IRQSTATUS);
hwinfo = dmm_read(omap_dmm, DMM_PAT_HWINFO);
pat_geom = dmm_read(omap_dmm, DMM_PAT_GEOMETRY);