Cannon Lake PCH cAVS (ALC892) not detected by kernel driver

[Pierre-Louis Bossart]

On 2/12/22 05:33, dmummenschanz at web.de wrote:
>    I did some more digging into the code to find out what goes boink.
>    For comparison I took my wife's desktop wich has a  Cannon Lake chipset
>    as well along with a working a ALC892 AVS device.
> 
>    It seems there is a codec mask issue selected in the chip->bus struct.
>    Inside the function
> 
>    static int azx_probe_continue(struct azx *chip)
> 
>    of hda_intel.c the bus->codec_mask on my wife's pc contains the integer
>    value "5" and both ALC892 and the HDMI is found. On my device it is "4"
>    and only the HDMI is found.
> 
>    /* create codec instances */
>    if (bus->codec_mask) {
>      err = azx_probe_codecs(chip, azx_max_codecs[chip->driver_type]);
>      if (err < 0)
>        goto out_free;
>    }
> 
>    After forcing the falue before probing: "bus->codec_mask = 5;" the
>    ALC892 is finally detected on my system and I have sound! alsa-info
>    below: Please pardon the trash printk's in the log ;-)
> 
>    http://alsa-project.org/db/?f=057aac1a0e9591de3847dca5ebc424dd65c8a221
> 
>    I'll do some more digging into it next week but it would probably
>    save tons of time if someone could point me is the right direction
>    where to look further?

Adding Kai and Takashi, in case they haven't see this codec_mask issue.
I personally don't recall having seen this before.