[yocto] Sound over HDMI for ASrock IMB-151 (valleyisland)

[Chris Tapp]

I'm having trouble getting audio out of the HDMI connector on an ASrock IMB-151 board.

aplay -l reports:

**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: ALC662 rev1 Digital [ALC662 rev1 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: ID 2882 Digital [ID 2882 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

and aplay -L gives:

null
    Discard all samples (playback) or generate zero samples (capture)
sysdefault:CARD=PCH
    HDA Intel PCH, ALC662 rev1 Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, ALC662 rev1 Analog
    Front speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, ALC662 rev1 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, ALC662 rev1 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, ALC662 rev1 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, ALC662 rev1 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, ALC662 rev1 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=PCH,DEV=0
    HDA Intel PCH, ALC662 rev1 Digital
    IEC958 (S/PDIF) Digital Audio Output
hdmi:CARD=PCH,DEV=0
    HDA Intel PCH, ID 2882 Digital
    HDMI Audio Output

Running

  aplay -D plug:hdmi /usr/share/sounds/alsa/Front_Center.wav

gives nothing out of the hdmi. And

  speaker-test -D hdmi

gives:

speaker-test 1.0.27.2

Playback device is hdmi
Stream parameters are 48000Hz, S16_LE, 1 channels
Using 16 octaves of pink noise
Channels count (1) not available for playbacks: Invalid argument
Setting of hwparams failed: Invalid argument

I've not been able to find anything on the internet that gives me a clue to what's wrong, and alsa is not an area I'm familiar with!

Anyone got an idea where I need to look?

--

Chris Tapp
opensource at keylevel.com
www.keylevel.com

----
You can tell you're getting older when your car insurance gets real cheap!