Porcelain patio

[Patat]

Hello all,

 

I do porcelain patio on my own I’m not the landscaper. I already dug out soil and got mot type1. But found out the problem. I’m doing 6cm fall on 3.6m long patio and on the end of the patio I got lawn which will be visible with uncovered soil. What to do with that 6cm of soil and lawn as I have read lawn should be below or at least on the same level as patio. Should I dig out soil and lower the whole level of garden or do the drainage with a pipe going under the lawn and going straight into the ground. The pipe could get blocked when I do so?