Optimalisation for OMAP

Currently I have some QML performance issues on an OMAP l138 processor. The drawing of (simple) windows are pretty slow. I have already optimized the QML declarative code (use Item instead of Rectangle, use png images instead of drawing, etc etc).

Does anyone has a suggestion how to speed up the drawing of QML files? Is there some hardware acceleration I can use?

The platform I use:

http://www.ti.com/product/omap-l138