2013-11-28 22:57, Lin, Mengdong skrev:
Hi Takashi,
We're trying to reduce the HD-A driver initialization time when more than one codecs are connected to the bus, but are blocked. Would you please share some advices on this?
Usually, there is one HD-A controller connecting to two codecs: one on-board codec and one integrated display codec. During initialization, the codecs are created and configured in a serial way.
Creating a codec may cost 6~20ms, and then building controls make cost about 15~30ms.
Sorry for interrupting, but I just wonder - I assume you have a maximum of 4 CPUs. Can't the other 3 CPUs be used to load other non-audio hardware in parallel instead? It sounds you're going to run into lock contention instead if you try to modify the same card from two threads simultaneously.