Hans-Christian Egtvedt wrote: > Is there a chance that the following might happen: > - stop trigger, > - hw_free > - hw_params > - prepare > - start trigger > > I.e. without calling close and open? Yes. It is also possible that the same happens without hw_free, i.e., hw_params has to initialize _or_ to change the parameters. > Clemens Ladisch <clemens@xxxxxxxxxx> wrote: > > The DMA address is selected by the driver in the hw_params callback, > > but most drivers let the framework handle this by calling > > snd_pcm_lib_malloc_pages(). > > Yes, this is what I do today. I am considering if I should release the > DMA stuff in hw_free and then in the prepare callback check if it needs > to be prepared again (since it was released in hw_free). The framework guarantees that prepare is called only when the hardware parameters are set. Best regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
