Avinash,
basically in order to be able to pass in multiple values... you need to include them with single quotes... 'value1','value2','value3' ... and so on... you can also try this:
select *
from <yourView>(PLACEHOLDER.$$"<YOUR_INPUT_PARAM>"$$ => <yourConcatIputValueCommaSeparatedIfMultiple>);
if you have multiple input params, you can include more by separating them with a comma