On Fri, 2009-11-06 at 13:20 +0000, Mark Brown wrote: > On Thu, Nov 05, 2009 at 08:08:30PM +0000, Liam Girdwood wrote: > > On Thu, 2009-11-05 at 21:28 +0200, Jarkko Nikula wrote: > > > > Would be nice if both the divider and frame size are calculated > > > dynamically based on CLKSRG frequency and sample rate. > > > This does sound like a useful feature and should probably exist in > > soc-core for other platforms too. > > A lot of drivers would probably have trouble using this due to the > number of different constraints in the dividers that can be set up that > random hardware has - it'd probably take more effort to finesse things > than it's worth - but a utility function for mostly unconstrained > hardware would be good. I was thinking more generic here. e.g. additions to soc.h :- static inline int snd_soc_get_framesize(int clock, struct snd_pcm_hw_params *params); A caller could vary clock based upon it's divider options. Error would be returned if there was not enough bandwidth. and static inline int snd_soc_get_divider(int clock, struct snd_pcm_hw_params *params); This would return the integer divider required or bandwidth error. and static inline int snd_soc_get_min_clock(struct snd_pcm_hw_params *params); return min bit clock required for params. Liam _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
