[alsa-devel] [Fwd: [Alsa-user] Intel Poulsbo(SCH) chipset does not recognize Adi 1986 codec under linux]]

[Kan-I Jyo]

Dear Takashi,

Thank you for your reply.

2008/6/25 Takashi Iwai <tiwai at suse.de>:

> The patch below enables the probe on 4th slot on SCH.

Thank you for your patch.
I have applied your patch and recompiled the snd-hda-intel kernel
module. A reload of the newly compiled driver stiil gives me the "no
codec found!" output in dmesg.

After inserting some snd_printk() into the hda_intel.c, it seems that
this "azx_readw()" macro in azx_reset() function returns a "0" to
chip->codec_mask on our not-working device. It is returns a "1" on the
other working device though.

<hda_intel.c>
-- snip --
 751         /* detect codecs */
 752         if (!chip->codec_mask) {
 753                 chip->codec_mask = azx_readw(chip, STATESTS);
 754                 snd_printk("codec_mask = 0x%x\n", chip->codec_mask);
-- snip --

<dmesg>
-- snip --
PCI: Setting latency timer of device 0000:00:1b.0 to 64
ALSA /root/alsa-driver-1.0.17rc2/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:2069:
chipset global capabilities = 0x2200
ALSA /root/alsa-driver-1.0.17rc2/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:912:
HDA snoop disabled, enabling ... OK
ALSA /root/alsa-driver-1.0.17rc2/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:754:
codec_mask = 0x0
ALSA /root/alsa-driver-1.0.17rc2/pci/hda/../../alsa-kernel/pci/hda/hda_intel.c:2142:
hda-intel: no codecs found!
ACPI: PCI interrupt for device 0000:00:1b.0 disabled

For I am not an expert in sound driver development, the above are
provided for reference. But would this be some kind of hint?

-- 
Sincerely,

Jyo