Re: [alsa-devel] MCP7A HDMI passthrough audio Linux/ALSA

30 Jun 2009

      Takashi Iwai a écrit :
...
At Tue, 30 Jun 2009 15:04:05 +0200,
Stéphane BERTHELOT wrote:
...
Hi Takashi,
Thanks for you answer.
I have the exact same problem and configuration than reported here 
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4406
apart :

I'm using a ION platform (Acer Revo R3600 but still MCP7A : 0x10de0007)
I never get the Dolby Digital or DTS indicator illuminated on my Amp.
My TV is a Sharp LC-52X20E

I thought this was a known problem and than someone at Nvidia could 
provide the missing HDA Verbs, if you prefer I can post to the 
alsa-devel mailing list to investigate further.
I can get a alsa-info output tonight, though it's very very similar to 
the one in the bug report. (and Raymond was saying that we should get 
"PCM AC3" on digital outputs)
Try ac3dec for a primary testing instead of mplayer.  It's included in
alsa-tools.
% ac3dec -C -H foo.ac3
Use the latest one so that it accespt -H option.
Takashi
Thank you Takashi for taking time to review my problem. I cc'ed 
alsa-devel since I have more info now and maybe some other people have 
the same problem or already a workaround.
I'm attaching the output of alsa-info.sh with my mixer settings and 
after having run ac3dec -H -C file.ac3
It works with -R instead of -C but does not work with -C or with -P 
(consumer or pro)
I also tried modifying settings using iecset (audio off / audio on and 
consumer/pro) and no combination seems to work.
When I play stereo LPCM my TV set plays sound and so does my Amp in PCM 
mode.
When I try to play in AC3 mode (-C) my TV set says "incompatible format 
received" and both the TV and Amp stay silent.
I may try again on XP/Vista tomorrow to be really sure it works on them.
When changing play mode AES0 changes from 0x00 to 0x02 and AES1 to AES3 
stay the same (0x82,0x00,0x02 if I remember well)
Is there any other test you want me to do, I'll have time tomorrow 
evening (CEST).
Thanks a lot,
Stephane.
(http://www.alsa-project.org/db/?f=cf3bc4202b4fcbf93ba68db55e492d51a3e46177)
!!################################
!!ALSA Information Script v 0.4.56
!!################################
!!Script ran on: Tue Jun 30 20:22:23 UTC 2009
!!Linux Distribution
!!------------------
Slackware 13.0.0.0.0
!!Kernel Information
!!------------------
Kernel release:    2.6.29.5
Operating System:  GNU/Linux
Architecture:      x86_64
Processor:         Intel(R) Atom(TM) CPU  230   @ 1.60GHz
SMP Enabled:       Yes
!!ALSA Version
!!------------
Driver version:     1.0.20
Library version:    1.0.18
Utilities version:  1.0.18
!!Loaded ALSA modules
!!-------------------
snd_hda_intel
!!Sound Servers on this system
!!----------------------------
ESound Daemon:
      Installed - Yes (/usr/bin/esd)
      Running - No
!!Soundcards recognised by ALSA
!!-----------------------------
0 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xfae78000 irq 22
!!PCI Soundcards installed in the system
!!--------------------------------------
00:08.0 Audio device: nVidia Corporation MCP79 High Definition Audio (rev b1)
!!Advanced information - PCI Vendor/Device/Susbsystem ID's
!!--------------------------------------------------------
00:08.0 0403: 10de:0ac0 (rev b1)
    Subsystem: 1025:0222
!!Loaded sound module options
!!--------------------------
!!Module: snd_hda_intel
bdl_pos_adj : 32,-1,-1,-1,-1,-1,-1,-1
enable : Y,Y,Y,Y,Y,Y,Y,Y
enable_msi : 0
id : <NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>
index : -1,-1,-1,-1,-1,-1,-1,-1
model : <NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>,<NULL>
position_fix : 0,0,0,0,0,0,0,0
power_save : 0
power_save_controller : Y
probe_mask : -1,-1,-1,-1,-1,-1,-1,-1
probe_only : N,N,N,N,N,N,N,N
single_cmd : N
!!HDA-Intel Codec information
!!---------------------------
--startcollapse--
Codec: Realtek ALC662 rev1
Address: 0
Function Id: 0x1
Vendor Id: 0x10ec0662
Subsystem Id: 0x10250222
Revision Id: 0x100101
No Modem Function Group found
Default PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
GPIO: io=2, o=0, i=0, unsolicited=1, wake=0
  IO[0]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
  IO[1]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
Node 0x02 [Audio Output] wcaps 0x1d: Stereo Amp-Out
  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
  Amp-Out vals:  [0x00 0x00]
  Converter: stream=0, channel=0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
Node 0x03 [Audio Output] wcaps 0x1d: Stereo Amp-Out
  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
  Amp-Out vals:  [0x00 0x00]
  Converter: stream=0, channel=0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
Node 0x04 [Audio Output] wcaps 0x1d: Stereo Amp-Out
  Amp-Out caps: ofs=0x40, nsteps=0x40, stepsize=0x03, mute=0
  Amp-Out vals:  [0x00 0x00]
  Converter: stream=0, channel=0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
Node 0x05 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x06 [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
Node 0x07 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x08 [Audio Input] wcaps 0x10011b: Stereo Amp-In
  Amp-In caps: ofs=0x09, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals:  [0x89 0x89]
  Converter: stream=0, channel=0
  SDI-Select: 0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0x6]: 16 20
    formats [0x1]: PCM
  Connection: 1
     0x23
Node 0x09 [Audio Input] wcaps 0x10011b: Stereo Amp-In
  Amp-In caps: ofs=0x09, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals:  [0x00 0x00]
  Converter: stream=0, channel=0
  SDI-Select: 0
  PCM:
    rates [0x160]: 44100 48000 96000
    bits [0x6]: 16 20
    formats [0x1]: PCM
  Connection: 1
     0x22
Node 0x0a [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x0b [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals:  [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80]
  Connection: 9
     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16
Node 0x0c [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x00 0x00]
  Connection: 2
     0x02 0x0b
Node 0x0d [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x00 0x00]
  Connection: 2
     0x03 0x0b
Node 0x0e [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x00 0x00]
  Connection: 2
     0x04 0x0b
Node 0x0f [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x10 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x11 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x12 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x13 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x14 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x0001003c: IN OUT HP EAPD Detect
  EAPD 0x0:
  Pin Default 0x01214010: [Jack] HP Out at Ext Rear
    Conn = 1/8, Color = Green
    DefAssociation = 0x1, Sequence = 0x0
  Pin-ctls: 0xc0: OUT HP
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0c
Node 0x15 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x00010034: IN OUT EAPD Detect
  EAPD 0x0:
  Pin Default 0x99130120: [Fixed] Speaker at Int ATAPI
    Conn = ATAPI, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0d
Node 0x16 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x80 0x80]
  Pincap 0x00000034: IN OUT Detect
  Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
    Conn = 1/8, Color = Black
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x20: IN
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0e
Node 0x17 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x18 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-In vals:  [0x00 0x00]
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x80 0x80]
  Pincap 0x00001734: IN OUT Detect
    Vref caps: HIZ 50 GRD 80
  Pin Default 0x01a19830: [Jack] Mic at Ext Rear
    Conn = 1/8, Color = Pink
    DefAssociation = 0x3, Sequence = 0x0
  Pin-ctls: 0x24: IN VREF_80
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0e
Node 0x19 [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-In vals:  [0x00 0x00]
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x80 0x80]
  Pincap 0x0000173c: IN OUT HP Detect
    Vref caps: HIZ 50 GRD 80
  Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
    Conn = 1/8, Color = Black
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x20: IN VREF_HIZ
  Unsolicited: tag=00, enabled=0
  Connection: 2
     0x0c* 0x0e
Node 0x1a [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x80 0x80]
  Pincap 0x00000034: IN OUT Detect
  Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
    Conn = 1/8, Color = Black
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x20: IN
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0d
Node 0x1b [Pin Complex] wcaps 0x40018f: Stereo Amp-In Amp-Out
  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x27, mute=0
  Amp-In vals:  [0x00 0x00]
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x80 0x80]
  Pincap 0x0000173c: IN OUT HP Detect
    Vref caps: HIZ 50 GRD 80
  Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
    Conn = 1/8, Color = Black
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x20: IN VREF_HIZ
  Unsolicited: tag=00, enabled=0
  Connection: 2
     0x0c* 0x0e
Node 0x1c [Pin Complex] wcaps 0x400001: Stereo
  Pincap 0x00000020: IN
  Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
    Conn = 1/8, Color = Black
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x20: IN
Node 0x1d [Pin Complex] wcaps 0x400000: Mono
  Pincap 0x00000020: IN
  Pin Default 0x40020601: [N/A] Line Out at Ext N/A
    Conn = 1/4, Color = Unknown
    DefAssociation = 0x0, Sequence = 0x1
  Pin-ctls: 0x20: IN
Node 0x1e [Pin Complex] wcaps 0x400300: Mono Digital
  Pincap 0x00000010: OUT
  Pin Default 0x411111f0: [N/A] Speaker at Ext Rear
    Conn = 1/8, Color = Black
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x40: OUT
  Connection: 1
     0x06
Node 0x1f [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x20 [Vendor Defined Widget] wcaps 0xf00040: Mono
  Processing caps: benign=0, ncoeff=12
  Processing Coefficient: 0x00
  Coefficient Index: 0x06
Node 0x21 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x22 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
  Connection: 10
     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x0b
Node 0x23 [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-In vals:  [0x00 0x00] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
  Connection: 10
     0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x14 0x15 0x16 0x0b
Node 0x24 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x25 [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x26 [Vendor Defined Widget] wcaps 0xf00000: Mono
Codec: Nvidia MCP7A HDMI
Address: 3
Function Id: 0x1
Vendor Id: 0x10de0007
Subsystem Id: 0x10de0101
Revision Id: 0x100100
No Modem Function Group found
Default PCM:
    rates [0x0]:
    bits [0x0]:
    formats [0x0]:
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
Node 0x04 [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital: Enabled Non-Audio Pro
  Digital category: 0x0
  PCM:
    rates [0xc0]: 48000 88200
    bits [0xf]: 8 16 20 24
    formats [0x1]: PCM
Node 0x05 [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000014: OUT Detect
  Pin Default 0x18560110: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x1, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x04
Node 0x06 [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0xc0]: 48000 88200
    bits [0xf]: 8 16 20 24
    formats [0x1]: PCM
Node 0x07 [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000014: OUT Detect
  Pin Default 0x58560121: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x1
    Misc = NO_PRESENCE
  Pin-ctls: 0x00:
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x06
Node 0x08 [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0xc0]: 48000 88200
    bits [0xf]: 8 16 20 24
    formats [0x1]: PCM
Node 0x09 [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000014: OUT Detect
  Pin Default 0x58560122: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x2
    Misc = NO_PRESENCE
  Pin-ctls: 0x00:
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x08
Node 0x0a [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0xc0]: 48000 88200
    bits [0xf]: 8 16 20 24
    formats [0x1]: PCM
Node 0x0b [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000014: OUT Detect
  Pin Default 0x58560123: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x3
    Misc = NO_PRESENCE
  Pin-ctls: 0x00:
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0a
Node 0x0c [Audio Output] wcaps 0x211: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  PCM:
    rates [0xc0]: 48000 88200
    bits [0xf]: 8 16 20 24
    formats [0x1]: PCM
Node 0x0d [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000014: OUT Detect
  Pin Default 0x58560124: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x4
    Misc = NO_PRESENCE
  Pin-ctls: 0x00:
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0c
--endcollapse--
!!ALSA Device nodes
!!-----------------
crw-rw---- 1 root audio 116,  0 Jul  1  2009 /dev/snd/controlC0
crw-rw---- 1 root audio 116,  4 Jul  1  2009 /dev/snd/hwC0D0
crw-rw---- 1 root audio 116,  7 Jul  1  2009 /dev/snd/hwC0D3
crw-rw---- 1 root audio 116, 24 Jul  1  2009 /dev/snd/pcmC0D0c
crw-rw---- 1 root audio 116, 16 Jun 30 22:11 /dev/snd/pcmC0D0p
crw-rw---- 1 root audio 116, 19 Jun 30 22:21 /dev/snd/pcmC0D3p
crw-rw---- 1 root audio 116,  1 Jun 30 22:10 /dev/snd/seq
crw-rw---- 1 root audio 116, 33 Jul  1  2009 /dev/snd/timer
!!ALSA configuration files
!!------------------------
!!System wide config file (/etc/asound.conf)
#pcm.!default {
#	     type plug
#	     slave.pcm "hdmi"
#}
pcm.hdmiconv { type plug slave { pcm "hw:0,3" rate 48000 } }
pcm.headset {
    type bluetooth
}
ctl.headset {
    type bluetooth
}
!!Aplay/Arecord output
!!------------
APLAY
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: ALC662 Analog [ALC662 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
ARECORD
**** List of CAPTURE Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: ALC662 Analog [ALC662 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
!!Amixer output
!!-------------
!!-------Mixer controls for card 0 [NVidia]
Card hw:0 'NVidia'/'HDA NVidia at 0xfae78000 irq 22'
  Mixer name	: 'Nvidia MCP7A HDMI'
  Components	: 'HDA:10ec0662,10250222,00100101 HDA:10de0007,10de0101,00100100'
  Controls      : 18
  Simple ctrls  : 9
Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 64
  Mono: Playback 52 [81%] [-12.00dB] [on]
Simple mixer control 'Headphone',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 0 [0%] [-64.00dB] [on]
  Front Right: Playback 0 [0%] [-64.00dB] [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 213 [84%] [-8.40dB]
  Front Right: Playback 213 [84%] [-8.40dB]
Simple mixer control 'Front',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 64
  Mono:
  Front Left: Playback 52 [81%] [-12.00dB] [on]
  Front Right: Playback 52 [81%] [-12.00dB] [on]
Simple mixer control 'Mic',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 0 [0%] [-34.50dB] [off]
  Front Right: Playback 0 [0%] [-34.50dB] [off]
Simple mixer control 'Mic Boost',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 0 [0%]
  Front Right: 0 [0%]
Simple mixer control 'IEC958',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 31
  Front Left: Capture 0 [0%] [-13.50dB] [on]
  Front Right: Capture 0 [0%] [-13.50dB] [on]
Simple mixer control 'Beep',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 0 [0%] [-34.50dB] [on]
  Front Right: Playback 0 [0%] [-34.50dB] [on]
!!Alsactl output
!!-------------
--startcollapse--
state.NVidia {
    control.1 {
    	comment.access 'read write'
    	comment.type INTEGER
    	comment.count 2
    	comment.range '0 - 64'
    	comment.dbmin -6400
    	comment.dbmax 0
    	iface MIXER
    	name 'Front Playback Volume'
    	value.0 52
    	value.1 52
    }
    control.2 {
    	comment.access 'read write'
    	comment.type BOOLEAN
    	comment.count 2
    	iface MIXER
    	name 'Front Playback Switch'
    	value.0 true
    	value.1 true
    }
    control.3 {
    	comment.access 'read write'
    	comment.type INTEGER
    	comment.count 2
    	comment.range '0 - 64'
    	comment.dbmin -6400
    	comment.dbmax 0
    	iface MIXER
    	name 'Headphone Playback Volume'
    	value.0 0
    	value.1 0
    }
    control.4 {
    	comment.access 'read write'
    	comment.type BOOLEAN
    	comment.count 2
    	iface MIXER
    	name 'Headphone Playback Switch'
    	value.0 true
    	value.1 true
    }
    control.5 {
    	comment.access 'read write'
    	comment.type INTEGER
    	comment.count 2
    	comment.range '0 - 31'
    	comment.dbmin -3450
    	comment.dbmax 1200
    	iface MIXER
    	name 'Mic Playback Volume'
    	value.0 0
    	value.1 0
    }
    control.6 {
    	comment.access 'read write'
    	comment.type BOOLEAN
    	comment.count 2
    	iface MIXER
    	name 'Mic Playback Switch'
    	value.0 false
    	value.1 false
    }
    control.7 {
    	comment.access 'read write'
    	comment.type INTEGER
    	comment.count 2
    	comment.range '0 - 3'
    	comment.dbmin 0
    	comment.dbmax 3000
    	iface MIXER
    	name 'Mic Boost'
    	value.0 0
    	value.1 0
    }
    control.8 {
    	comment.access 'read write'
    	comment.type BOOLEAN
    	comment.count 2
    	iface MIXER
    	name 'Capture Switch'
    	value.0 true
    	value.1 true
    }
    control.9 {
    	comment.access 'read write'
    	comment.type INTEGER
    	comment.count 2
    	comment.range '0 - 31'
    	comment.dbmin -1350
    	comment.dbmax 3300
    	iface MIXER
    	name 'Capture Volume'
    	value.0 0
    	value.1 0
    }
    control.10 {
    	comment.access 'read write'
    	comment.type INTEGER
    	comment.count 2
    	comment.range '0 - 31'
    	comment.dbmin -3450
    	comment.dbmax 1200
    	iface MIXER
    	name 'Beep Playback Volume'
    	value.0 0
    	value.1 0
    }
    control.11 {
    	comment.access 'read write'
    	comment.type BOOLEAN
    	comment.count 2
    	iface MIXER
    	name 'Beep Playback Switch'
    	value.0 true
    	value.1 true
    }
    control.12 {
    	comment.access 'read write'
    	comment.type INTEGER
    	comment.count 1
    	comment.range '0 - 64'
    	comment.dbmin -6400
    	comment.dbmax 0
    	iface MIXER
    	name 'Master Playback Volume'
    	value 52
    }
    control.13 {
    	comment.access 'read write'
    	comment.type BOOLEAN
    	comment.count 1
    	iface MIXER
    	name 'Master Playback Switch'
    	value true
    }
    control.14 {
    	comment.access read
    	comment.type IEC958
    	comment.count 1
    	iface MIXER
    	name 'IEC958 Playback Con Mask'
    	value '0fff000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
    }
    control.15 {
    	comment.access read
    	comment.type IEC958
    	comment.count 1
    	iface MIXER
    	name 'IEC958 Playback Pro Mask'
    	value '0f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
    }
    control.16 {
    	comment.access 'read write'
    	comment.type IEC958
    	comment.count 1
    	iface MIXER
    	name 'IEC958 Playback Default'
    	value '0782000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
    }
    control.17 {
    	comment.access 'read write'
    	comment.type BOOLEAN
    	comment.count 1
    	iface MIXER
    	name 'IEC958 Playback Switch'
    	value true
    }
    control.18 {
    	comment.access 'read write user'
    	comment.type INTEGER
    	comment.count 2
    	comment.range '0 - 255'
    	comment.tlv '0000000100000008ffffec1400000014'
    	comment.dbmin -5100
    	comment.dbmax 0
    	iface MIXER
    	name 'PCM Playback Volume'
    	value.0 213
    	value.1 213
    }
}
--endcollapse--
!!All Loaded Modules
!!------------------
Module
snd_seq_dummy
snd_seq_oss
snd_seq_midi_event
snd_seq
snd_seq_device
snd_pcm_oss
snd_mixer_oss
ipv6
ppdev
lp
parport_pc
parport
fuse
snd_hda_codec_nvhdmi
nvidia
snd_hda_codec_realtek
ath5k
mac80211
rfkill
led_class
snd_hda_intel
cfg80211
snd_hda_codec
psmouse
serio_raw
shpchp
snd_hwdep
snd_pcm
snd_timer
sg
snd
soundcore
forcedeth
snd_page_alloc
rtc_cmos
rtc_core
thermal
wmi
rtc_lib
processor
button
thermal_sys
hwmon
evdev

Re: [alsa-devel] MCP7A HDMI passthrough audio Linux/ALSA

Stephane BERTHELOT