How to get mat select selected value in tool tip using angular material

I am displaying a drop down using angular material mat select. I want to display selected element using material tool tip.

<mat-select [(ngModel)]="emp" [(value)]="selected" matTooltip="{{selected}} 
(openedChange)="oChange($event)" placeholder="Employee" [formControl]="toppings" multiple>
<mat-option  *ngFor="let p of emp" [value]="p" >{{p.name}}</mat-option>
</mat-select>
</mat-form-field>

But its showing [object object]

Here is content of emp

emp[
{"id":0101,"name":"damshad"},
{"id":0102,"name":"ranjan"},
{"id":0103,"name":"himanshu"},
{"id":0104,"name":"gourge"},
{"id":0105,"name":"taffic"},
{"id":0106,"name":"ajir"},
{"id":0107,"name":"mallom"}
]

Please help

You missed {{}} close curly braces.

I have create demo on stackblitz

Html code

 <mat-select [(ngModel)]="selected" matTooltip="{{getToolTipDEata(selected)}}"  multiple>
    <mat-option  *ngFor="let p of emp" [value]="p" >{{p.name}}</mat-option>
</mat-select>

ts code

selected=null;
  emp=[{
    name:'emp 1'
  },{
    name:'emp 2'
  }]

  getToolTipDEata(data){
    if(data && data.length){
      let msg="";
      data.forEach(res=>{
        msg+=res.name + " ";
      })
      return msg;
    }else{
      return "please select employee";
    }
  }