mesa/src/freedreno/.dir-locals.el

((prog-mode
  (indent-tabs-mode . nil)
  (tab-width . 3)
  (c-basic-offset . 3)
  (c-file-style . "k&r")
  (fill-column . 78)
  (c-file-offsets
   (arglist-cont-nonempty . ++)
   )
  )
 )