detail_place.tcl doesn't have environment variables for detailed placement

[cham666]

Description

###############################################
In detail_place.tcl:

...
  set_placement_padding -global \
    -left $::env(CELL_PAD_IN_SITES_DETAIL_PLACEMENT) \
    -right $::env(CELL_PAD_IN_SITES_DETAIL_PLACEMENT)
  detailed_placement

  if { $::env(ENABLE_DPO) } {
    if { [env_var_exists_and_non_empty DPO_MAX_DISPLACEMENT] } {
      improve_placement -max_displacement $::env(DPO_MAX_DISPLACEMENT)
    } else {
      improve_placement
    }
  }
...

###############################################
Sometimes max_displacement can fix the detail placement error by setting to a large number

detailed_placement [-max_displacement disp|{disp_x disp_y}]
[-disallow_one_site_gaps] [-report_file_name file_name]

Suggested Solution

...
  set_placement_padding -global \
    -left $::env(CELL_PAD_IN_SITES_DETAIL_PLACEMENT) \
    -right $::env(CELL_PAD_IN_SITES_DETAIL_PLACEMENT)
  detailed_placement  -max_displacement $::env(CELL_PAD_IN_SITES_DETAIL_DISPLACEMENT)

  if { $::env(ENABLE_DPO) } {
    if { [env_var_exists_and_non_empty DPO_MAX_DISPLACEMENT] } {
      improve_placement -max_displacement $::env(DPO_MAX_DISPLACEMENT)
    } else {
      improve_placement
    }
  }
...

Additional Context

No response