Watch the Lower It On Down online guitar lesson by Brad Carlton from Chord Studies: i to V7 Vamps Vol. 1

Your first chord here is a Dsus4, and then the top voice moves down a whole step to get Dm. The next chord is an A11♭9 with no♭7, then your second and third finger will already be in place so that you lower the second and third voices a half step and you have a stock A chord.