580d2e7c78
The doc currently mentions that the IEC958 Playback Default should be exposed on the PCM iface, and the Playback Mask on the mixer iface. It's a bit confusing to advise to have two related controls on two separate ifaces, and it looks like the drivers that currently expose those controls use any combination of the mixer and PCM ifaces. Let's try to clarify the situation a bit, and encourage to at least have the controls on the same iface. Bug: 239396464 Change-Id: Ie0fb033564972f74154c378c644c581dc4d06dfa Signed-off-by: Maxime Ripard <maxime@cerno.tech> Reviewed-by: Takashi Iwai <tiwai@suse.de> Link: https://lore.kernel.org/r/20210525132354.297468-2-maxime@cerno.tech Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com> (cherry picked from commit aa7899537a4ec63ac3d58c9ece945c2750d22168)