Find Elapsed Duration for same consecutive value in pyspark

Question

I have data of following type:

Timestamp,value1,value2
10/22/2020 0:01,1,0
10/22/2020 0:04,1,0
10/22/2020 0:06,1,0
10/22/2020 0:15,2,1
10/22/2020 0:20,2,1
10/