Sound issues with Dell Latitude 7490 (kabylake)

[Jakob Alvermark]

On 10/2/18 9:48 PM, Emmanuel Vadot wrote:
> On Tue, 2 Oct 2018 14:29:39 -0500
> Eric van Gyzen <eric at vangyzen.net> wrote:
>
>>>>> Thanks. So if you try this:
>>>>>
>>>>> sysctl dev.hdaa.0.nid24_config="as=4 seq=15"
>>>>> sysctl dev.hdaa.0.nid21_config="as=1 seq=15"
>>>>> sysctl dev.hdaa.0.reconfig=1
>>>> Works, thank you!
>>>    Dude that's some serious shit !
>>>    Jacob, is this documented somewhere ?
>>>    I haven't read the driver code but what does as/seq etc represent
>>> there ?
>> snd_hda(4) is very helpful.
>   Indeed it is but I'm not sure that everyone (me included) can produce
> what Jacob did to have headphone re-routed and muting the other outputs
> just by reading the manual.


I learned this the hard way. snd_hda(4) is a lot of help, but it took me 
a long time

to understand it. snd_hda is quite complicated!

hdaa.c by itself is 7000+ lines. On top of that is hdaa_patches.c with 
~700 lines of added quirks

for some hardware.

>
>>>    What could we do to make this
>>> easier for users ?
>> We can commit similar changes to the kernel driver.  kstaring on github
>> has ported many such changes from Linux to FreeBSD:
>>
>> 	https://github.com/freebsd/freebsd/pull/139
>> 	https://github.com/freebsd/freebsd/pull/144
>>
>> I don't know if his port includes the changes Rod needs.
>>
>> I was planning to commit these when life calms down enough to test them.
>>    If anyone beats me to it, I would be delighted.  I was also waiting
>> until after 12.0, but in hindsight, I wish I had just committed them.
>   Please do as soon as 13-CURRENT branches and let people
> test/complain :)
>
>> Eric
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