Only stereo output possible with ATI Tahiti XT HDMI Audio [Radeon HD 7970 Series] [1002:aaa0]

Only stereo output possible with ATI Tahiti XT HDMI Audio [Radeon HD 7970 Series] [1002:aaa0]

[Olivier Langlois]

I have an HDMI chain with a Radeon card on 1 side and a 1080P monitor at the other end with a Pioner SC-09TX A/V Receiver in the middle.

Video is transmitted fine.
2 channels pcm plays fine on the receiver.

I am totally unable to output sound with 8 channels.

lano1106@whippet2 /proc/asound/card0 $ speaker-test -c8

speaker-test 1.0.27

Playback device is default
Stream parameters are 48000Hz, S16_LE, 8 channels
Using 16 octaves of pink noise
Channels count (8) not available for playbacks: Invalid argument
Setting of hwparams failed: Invalid argument

My neophyte instinct tells me that the problem is interoperability issue between the Radeon Audio controller and the SC-09TX receiver.
That would be great to be able to tweak the hda driver to workaround the problem but if I was able to manually program the hda codec module
to accept 8 channel LPCM input, that would be good enough for me.

My understanding is that in the advent of HDMI handshake failure, the sound source fallbacks to the bare minimum requirement that the HDMI
standard requires.

I have started to read Intel HDA manual. What I would like to know is:

Is it known if my particular HDA device is able to output 48KHz 8 channels LPCM? would it configurable manually?

Which HDA verbs should get familiar with if I want to tweak the code to configure the controller manually?

Thank you,
Olivier


lano1106@whippet2 ~ $ lspci -nn | grep Audio
01:00.1 Audio device [0403]: Advanced Micro Devices [AMD] nee ATI Tahiti XT HDMI Audio [Radeon HD 7970 Series] [1002:aaa0]

Linux: 3.8.12

alsalib:1.0.27

lano1106@whippet2 /proc/asound/card0 $ dmesg | grep ALSA
[    6.351490] ALSA sound/pci/hda/hda_intel.c:2848 0000:01:00.1: Handle VGA-switcheroo audio client
[    6.351491] ALSA sound/pci/hda/hda_intel.c:3040 0000:01:00.1: Using LPIB position fix
[    6.351493] ALSA sound/pci/hda/hda_intel.c:3157 0000:01:00.1: Force to non-snoop mode
[    6.351619] ALSA sound/pci/hda/hda_intel.c:3282 0000:01:00.1: chipset global capabilities = 0x0
[    6.354036] ALSA sound/pci/hda/hda_intel.c:1131 0000:01:00.1: codec_mask = 0x1
[    6.354061] ALSA sound/pci/hda/hda_intel.c:1600 0000:01:00.1: codec #0 probed OK
[    6.354062] ALSA sound/pci/hda/hda_intel.c:1716 0000:01:00.1: Enable sync_write for stable communication
[    6.411369] ALSA sound/pci/hda/patch_hdmi.c:1173 HDMI status: Codec=0 Pin=3 Presence_Detect=0 ELD_Valid=0
[    6.411397] ALSA sound/pci/hda/patch_hdmi.c:1173 HDMI status: Codec=0 Pin=5 Presence_Detect=0 ELD_Valid=0
[    6.411424] ALSA sound/pci/hda/patch_hdmi.c:1173 HDMI status: Codec=0 Pin=7 Presence_Detect=0 ELD_Valid=0
[    6.411453] ALSA sound/pci/hda/patch_hdmi.c:1173 HDMI status: Codec=0 Pin=9 Presence_Detect=0 ELD_Valid=0
[    6.411482] ALSA sound/pci/hda/patch_hdmi.c:1173 HDMI status: Codec=0 Pin=11 Presence_Detect=0 ELD_Valid=0
[    6.411512] ALSA sound/pci/hda/patch_hdmi.c:1173 HDMI status: Codec=0 Pin=13 Presence_Detect=0 ELD_Valid=0
[   29.487577] ALSA sound/pci/hda/patch_hdmi.c:951 HDMI hot plug event: Codec=0 Pin=3 Presence_Detect=1 ELD_Valid=0
[   29.487593] ALSA sound/pci/hda/patch_hdmi.c:1173 HDMI status: Codec=0 Pin=3 Presence_Detect=1 ELD_Valid=1
[   29.487605] ALSA sound/pci/hda/hda_eld.c:337 HDMI: ELD buf size is 0, force 128
[   29.487617] ALSA sound/pci/hda/hda_eld.c:356 HDMI: invalid ELD data byte 0

lano1106@whippet2 /proc/asound/card0 $ cat eld#0.0
monitor_present         1
eld_valid               0

lano1106@whippet2 /proc/asound/card0 :( $ cat codec#0 
Codec: ATI R6xx HDMI
Address: 0
AFG Function Id: 0x1 (unsol 0)
Vendor Id: 0x1002aa01
Subsystem Id: 0x00aa0100
Revision Id: 0x100300
No Modem Function Group found
Default PCM:
    rates [0x70]: 32000 44100 48000
    bits [0x2]: 16
    formats [0x5]: PCM AC3
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
Node 0x02 [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=1, channel=0
  Digital: Enabled
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x03 [Pin Complex] wcaps 0x400381: Stereo Digital
  Control: name="HDMI/DP,pcm=3 Jack", index=0, device=0
  Control: name="IEC958 Playback Con Mask", index=0, device=0
  Control: name="IEC958 Playback Pro Mask", index=0, device=0
  Control: name="IEC958 Playback Default", index=0, device=0
  Control: name="IEC958 Playback Switch", index=0, device=0
  Control: name="ELD", index=0, device=3
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x185600f0: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=01, enabled=1
  Connection: 1
     0x02
Node 0x04 [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x05 [Pin Complex] wcaps 0x400381: Stereo Digital
  Control: name="HDMI/DP,pcm=7 Jack", index=0, device=0
  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
  Control: name="ELD", index=0, device=7
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x185600f0: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=02, enabled=1
  Connection: 1
     0x04
Node 0x06 [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x07 [Pin Complex] wcaps 0x400381: Stereo Digital
  Control: name="HDMI/DP,pcm=8 Jack", index=0, device=0
  Control: name="IEC958 Playback Con Mask", index=2, device=0
  Control: name="IEC958 Playback Pro Mask", index=2, device=0
  Control: name="IEC958 Playback Default", index=2, device=0
  Control: name="IEC958 Playback Switch", index=2, device=0
  Control: name="ELD", index=0, device=8
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x185600f0: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=03, enabled=1
  Connection: 1
     0x06
Node 0x08 [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x09 [Pin Complex] wcaps 0x400381: Stereo Digital
  Control: name="HDMI/DP,pcm=9 Jack", index=0, device=0
  Control: name="IEC958 Playback Con Mask", index=3, device=0
  Control: name="IEC958 Playback Pro Mask", index=3, device=0
  Control: name="IEC958 Playback Default", index=3, device=0
  Control: name="IEC958 Playback Switch", index=3, device=0
  Control: name="ELD", index=0, device=9
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x185600f0: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=04, enabled=1
  Connection: 1
     0x08
Node 0x0a [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x0b [Pin Complex] wcaps 0x400381: Stereo Digital
  Control: name="HDMI/DP,pcm=10 Jack", index=0, device=0
  Control: name="IEC958 Playback Con Mask", index=4, device=0
  Control: name="IEC958 Playback Pro Mask", index=4, device=0
  Control: name="IEC958 Playback Default", index=4, device=0
  Control: name="IEC958 Playback Switch", index=4, device=0
  Control: name="ELD", index=0, device=10
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x185600f0: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=05, enabled=1
  Connection: 1
     0x0a
Node 0x0c [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x0d [Pin Complex] wcaps 0x400381: Stereo Digital
  Control: name="HDMI/DP,pcm=11 Jack", index=0, device=0
  Control: name="IEC958 Playback Con Mask", index=5, device=0
  Control: name="IEC958 Playback Pro Mask", index=5, device=0
  Control: name="IEC958 Playback Default", index=5, device=0
  Control: name="IEC958 Playback Switch", index=5, device=0
  Control: name="ELD", index=0, device=11
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x185600f0: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=06, enabled=1
  Connection: 1
     0x0c

whippet2 /sys/kernel/debug/tracing # cat trace_pipe
     kworker/u:5-130   [002] ...1 79390.094652: hda_send_cmd: [0:0] val=3f0900
     kworker/u:5-130   [002] ...1 79390.094665: hda_get_response: [0:0] val=ffffffff
     kworker/u:5-130   [002] ...1 79390.094667: hda_send_cmd: [0:0] val=3f2e08
     kworker/u:5-130   [002] ...1 79390.094677: hda_get_response: [0:0] val=0
     kworker/u:5-130   [002] ...1 79390.094679: hda_send_cmd: [0:0] val=3f2f00
     kworker/u:5-130   [002] ...1 79390.094689: hda_get_response: [0:0] val=0
     kworker/u:5-130   [002] ...1 79390.394001: hda_send_cmd: [0:0] val=3f2e08
     kworker/u:5-130   [002] ...1 79390.394045: hda_get_response: [0:0] val=0
     kworker/u:5-130   [002] ...1 79390.394050: hda_send_cmd: [0:0] val=3f2f00
     kworker/u:5-130   [002] ...1 79390.394071: hda_get_response: [0:0] val=0
     kworker/u:5-130   [002] ...1 79390.694227: hda_send_cmd: [0:0] val=3f2e08
     kworker/u:5-130   [002] ...1 79390.694281: hda_get_response: [0:0] val=0
     kworker/u:5-130   [002] ...1 79390.694286: hda_send_cmd: [0:0] val=3f2f00
     kworker/u:5-130   [002] ...1 79390.694307: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28163.617406: hda_send_cmd: [0:0] val=3f2e08
     kworker/u:5-130   [000] ...1 28163.617420: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28163.617425: hda_send_cmd: [0:0] val=3f2f00
     kworker/u:5-130   [000] ...1 28163.617436: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28163.917628: hda_send_cmd: [0:0] val=3f2e08
     kworker/u:5-130   [000] ...1 28163.917642: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28163.917647: hda_send_cmd: [0:0] val=3f2f00
     kworker/u:5-130   [000] ...1 28163.917657: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28164.217846: hda_send_cmd: [0:0] val=3f2e08
     kworker/u:5-130   [000] ...1 28164.217860: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28164.217865: hda_send_cmd: [0:0] val=3f2f00
     kworker/u:5-130   [000] ...1 28164.217875: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28164.518101: hda_send_cmd: [0:0] val=3f2e08
     kworker/u:5-130   [000] ...1 28164.518115: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28164.518119: hda_send_cmd: [0:0] val=3f2f00
     kworker/u:5-130   [000] ...1 28164.518130: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28164.818310: hda_send_cmd: [0:0] val=3f2e08
     kworker/u:5-130   [000] ...1 28164.818323: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28164.818328: hda_send_cmd: [0:0] val=3f2f00
     kworker/u:5-130   [000] ...1 28164.818339: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28165.118549: hda_send_cmd: [0:0] val=3f2e08
     kworker/u:5-130   [000] ...1 28165.118563: hda_get_response: [0:0] val=0
     kworker/u:5-130   [000] ...1 28165.118568: hda_send_cmd: [0:0] val=3f2f00
     kworker/u:5-130   [000] ...1 28165.118579: hda_get_response: [0:0] val=0

Re: Only stereo output possible with ATI Tahiti XT HDMI Audio [Radeon HD 7970 Series] [1002:aaa0]

[Olivier Langlois]

Hi,

Just a small update to my ALSA journey. After having read the HDA spec,
I now realize that beside the IEC958 control reg, there is not much
programmable from the HDA side and if the audio widget caps says stereo
that is pretty much it, valid ELD or not.

Something that I ommited to mention in my original request, it is that I
am using the catalyst closed source driver. Apparently the video driver
has something to do in order to have audio working as the open source
radeon card has a parameter 'radeon.audio=1'.

I have also read that the opens source driver do not support yet the
7970 (aka Radeon SI Southern Islands) but I am intrigued and now that I
have hit a dead-end on the HDA front, I'll explore the radeon driver
source code to see what it does related to audio in these cards.

In the meantime, I have tried to setup an alternative with my given
wcaps:

lano1106@whippet2 ~ :( $ cat /etc/asound.conf
pcm.mypcm {
   type plug
   slave {
     pcm "hdmi:{AES0 0x6 AES1 0x82 AES2 0x0 AES3 0x2}"
   }
}

pcm.a52encode {
    type a52
    slavepcm mypcm
}

pcm.!default pcm.a52encode

lano1106@whippet2 ~ $ speaker-test -c6

speaker-test 1.0.27

Playback device is default
Stream parameters are 48000Hz, S16_LE, 6 channels
Using 16 octaves of pink noise
Access type not available for playback: Invalid argument
Setting of hwparams failed: Invalid argument

Apparently, SND_PCM_ACCESS_RW_INTERLEAVED is not supported with my
setup.

Could I have seen it with something in /proc/asound ?
Is there a way to fix this with some kind of alsa plug setup?

Greetings and thank you in advance for your help,
Olivier

Re: Only stereo output possible with ATI Tahiti XT HDMI Audio [Radeon HD 7970 Series] [1002:aaa0]

[Olivier Langlois]

On Wed, 2013-05-15 at 09:46 -0400, Olivier Langlois wrote:

> 
> In the meantime, I have tried to setup an alternative with my given
> wcaps:
> 
> lano1106@whippet2 ~ :( $ cat /etc/asound.conf
> pcm.mypcm {
>    type plug
>    slave {
>      pcm "hdmi:{AES0 0x6 AES1 0x82 AES2 0x0 AES3 0x2}"
>    }
> }
> 
> pcm.a52encode {
>     type a52
>     slavepcm mypcm
> }
> 
> pcm.!default pcm.a52encode
> 
> lano1106@whippet2 ~ $ speaker-test -c6
> 
> speaker-test 1.0.27
> 
> Playback device is default
> Stream parameters are 48000Hz, S16_LE, 6 channels
> Using 16 octaves of pink noise
> Access type not available for playback: Invalid argument
> Setting of hwparams failed: Invalid argument
> 
> Apparently, SND_PCM_ACCESS_RW_INTERLEAVED is not supported with my
> setup.
> 
I am grateful that noone has replied as it has allowed me to dig alsa
and appreciate further its design.

For completeness and help the next user stumbling on the same problem, I
am autoreplying to myself

Trivia quiz: What kind of access mode does the a52 plugin accept?
A: It depends...INTERLEAVED if libavcodec is old or NONINTERLEAVED if
you have a recent ffmpeg setup, in anycase, a plug shield you from
surprises....:

pcm.a52encode {
    type a52
    card 0
}

pcm.a52accessadapter {
    type plug
    slave {
      pcm a52encode
    }
}

pcm.!default pcm.a52accessadapter

Concerning ATI Tahiti 7.1 HDMI output. Looking into patch_hdmi.c and by
seeing the special secret magic handshake to enable 7.1 output for a nvidia
device made me thinking about a slight hope to do something similar for
my card. I'll report back if I find the ATI magic incantation to reach
7.1 nirvana.