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Currently only one stream is supported. This isn't usally a problem
until you have a multi codec audio card. Because the audio card will run
startup and shutdown on both capture and playback streams. So if your
hdmi-codec only support either playback or capture. Then ALSA can't open
for playback and capture.
This patch will ignore if startup and shutdown are called with a non
supported stream. Thus, allowing an audio card like this:
+-+
cpu1 <--@-| |-> codec1 (HDMI-CODEC)
| |<- codec2 (NOT HDMI-CODEC)
+-+
Signed-off-by: Emil Svendsen <emas@bang-olufsen.dk>
Link: https://lore.kernel.org/r/20230309065432.4150700-2-emas@bang-olufsen.dk
Signed-off-by: Mark Brown <broonie@kernel.org>