He talked about his introduction to Buddhism (he practices Nichiren chanting, as does Tina Turner) through his bass player in a 2007 interview.
The cool thing is that jazz is really a wonderful example of the great characteristics of Buddhism and great characteristics of the human spirit. Because in jazz we share, we listen to each other, we respect each other, we are creating in the moment. At our best we’re non-judgmental. If we let judgment get in the way of improvising, it always screws us up. So we take whatever happens and try to make it work. We try to make it fit. We try to enhance it.