2.6.28: hda_codec: Unknown model for ALC883, trying auto-probe fromBIOS...

[Justin Piszcz]

The audio for this board works fine, there are no issues, but there are 
some cosmetic issues when the driver loads:

1. Unknown model.
2. Wrong model number.

On my ABIT AW9D-MAX motherboard:
[   10.667963] Advanced Linux Sound Architecture Driver Version 1.0.18rc3.
[   10.668156] HDA Intel 0000:00:1b.0: PCI INT A -> GSI 16 (level, low) -> IRQ 1
6
[   10.668228] HDA Intel 0000:00:1b.0: setting latency timer to 64
[   10.677932] hda_codec: Unknown model for ALC883, trying auto-probe from BIOS.
..
[   10.705082] ALSA device list:
[   10.705128]   #0: HDA Intel at 0xfdff8000 irq 16

On an Intel motherboard, correctly detected, no warnings about an Unknown
model.

[    5.466951] Advanced Linux Sound Architecture Driver Version 1.0.18rc3.
[    5.470149] HDA Intel 0000:00:1b.0: PCI INT A -> GSI 22 (level, low) -> IRQ 22
[    5.473135] HDA Intel 0000:00:1b.0: setting latency timer to 64
[    5.512645] ALSA device list:
[    5.515568]   #0: HDA Intel at 0xe2420000 irq 22

Specs:
# abit AudioMAX# HD 7.1 CH
# Supports Jack Sensing and S/PDIF In/Out
# Dolby® Master Studio Certificated 
http://www.abit.com.tw/page/en/motherboard/motherboard_detail.php?pMODEL_NAME=AW9D-MAX&fMTYPE=LGA775&pPRODINFO=Specifications&fSEARCHTEXT=AW9D-MAX

Not too specific, however:
http://www.anandtech.com/mb/showdoc.aspx?i=2829

Reveals the correct model:
-> Realtek ALC882M HD-Audio 8-channel CODEC - Dolby Master Studio 
Where the kernel believes it is an ALC883.

Would it be possible to probe properly/and get the correct model number in 
there for this audio chipset?

lspci:
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)

lspci -vvvx:
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
  Subsystem: ABIT Computer Corp. Device 107a
  Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
  Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
  Latency: 0, Cache Line Size: 4 bytes
  Interrupt: pin A routed to IRQ 16
  Region 0: Memory at fdff8000 (64-bit, non-prefetchable) [size=16K]
  Capabilities: [50] Power Management version 2
    Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
    Status: D0 PME-Enable- DSel=0 DScale=0 PME-
  Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
    Address: 0000000000000000  Data: 0000
  Capabilities: [70] Express (v1) Root Complex Integrated Endpoint, MSI 00
    DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
      ExtTag- RBE- FLReset-
    DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
      RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
      MaxPayload 128 bytes, MaxReadReq 128 bytes
    DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
    LnkCap: Port #0, Speed unknown, Width x0, ASPM unknown, Latency L0 <64ns, L1 <1us
      ClockPM- Suprise- LLActRep- BwNot-
    LnkCtl: ASPM Disabled; Disabled- Retrain- CommClk-
      ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
    LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt-
  Capabilities: [100] Virtual Channel <?>
  Capabilities: [130] Root Complex Link <?>
  Kernel driver in use: HDA Intel
00: 86 80 d8 27 06 00 10 00 01 00 03 04 01 00 00 00
10: 04 80 ff fd 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 7b 14 7a 10
30: 00 00 00 00 50 00 00 00 00 00 00 00 05 01 00 00