John Utz wrote: > are there reasons why one might prefer one of these or the other? Because reading AC'97 registers is rather slow, there is a cache of register values. Use snd_ac97_write() for registers that should not be cached. Use snd_ac97_write_cache() to write to a register that can be cached, i.e., later reads can take the value from the cache instead of reading from the codec. Use snd_ac97_update() to write to a register where writing the same value would not have any effect. Use snd_ac97_update_bits() in the same situation as snd_ac97_update(), but when you want to update only some bits. Use snd_ac97_read() for uncached reads; and snd_ac97_read_cache() for reads from the cache, if possible. HTH Clemens ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
