http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=814c0371a493cf47df4e6e27253cfd5ec3cef783
for 5.1 passthrough, the application have to set the non-audio bit of
iec958 control
i.e. HDMI need to set index to 1
Codec: Nvidia MCP67 HDMI
Address: 3
AFG Function Id: 0x1 (unsol 0)
Vendor Id: 0x10de0067
Subsystem Id: 0x00670000
Revision Id: 0x100000
Node 0x04 [Audio Output] wcaps 0x211: Stereo Digital
Control: name="IEC958 Playback Con Mask", index=1, device=0
Control: name="IEC958 Playback Pro Mask", index=1, device=0
Control: name="IEC958 Playback Default", index=1, device=0
Control: name="IEC958 Playback Switch", index=1, device=0
Device: name="HDMI 0", type="HDMI", device=3
Converter: stream=8, channel=0
Digital: Enabled
Digital category: 0x0
IEC Coding Type: 0x0
PCM:
rates [0x40]: 48000
bits [0x2]: 16
formats [0x1]: PCM
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https://bugs.launchpad.net/bugs/1249705
Title:
HDMI output not available in 13.10
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