: doc: Update copy_user, copy_kernel and fill_silence PCM ops
Reviewed-by: Takashi Sakamoto <o-taka...@sakamocchi.jp>
I did easy test with snd-hda-intel/snd-fireworks in below conditions.
Things work well:
1. ALSA application (aplay/arecord) for '__user *' <-> '__kernel *' copyin
ers for USB. But I don't know exactly
that USB related specifications such as USB Audio Device Class
1.0/2.0/3.0 supports the feature.
Regards
Takashi Sakamoto
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