tree f1bc9f20c69d1245e1c7d70d384f3c17bcbdfa8c
parent 7ca3a18b055ac6667f4e7e34eae6637270002402
author Mark Brown <broonie@opensource.wolfsonmicro.com> 1318157525 +0100
committer Mark Brown <broonie@opensource.wolfsonmicro.com> 1318158468 +0100

ASoC: Cache connected input and output recursions

The number of connected input and output endpoints for a given widgets
can't change during a DAPM run so there is no need to redo the recursion
through branches of the tree we've already visited. Doing this on one of
my test systems gives an improvement of:

         Power    Path   Neighbour
Before:  63       607    731
After:   63       141    181

which scales up well as more widgets are involved in paths.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>