[alsa-devel] [PATCH 0/30] ALSA: HDA VIA: patch series

[Robert Hancock]

On Sun, Oct 11, 2009 at 10:18 AM, Takashi Iwai <tiwai at suse.de> wrote:
> At Sat, 10 Oct 2009 19:07:09 +0800,
> Logan Li wrote:
>>
>> Following patch series mainly includes:
>>  - support VT1718S, VT2002P, VT1812S, VT1716S, ...
>>  - support smart 5.1
>>  - add jack detection for VT1708
>>  - power saving functions
>
> Thanks for the patches.  They are all well formatted now.
>
> I applied your patches except for 17,
>        ALSA: HDA VIA: Add 2nd S/PDIF out for VT1708S and VT1702
> as Robert reported a regression.
>
> This is likely because of the behavior change by this patch.  Now
> the second SPDIF has to be specified manually with the explicit
> substream number.  This itself is fine, but I see the problem with
> pulseaudio, for example.  There is no good way to specify this substream
> automatically for PA with some symbols like "spdif" or "hdmi".
>
> This is basically a problem of the current ALSA core and HD-audio core
> implementation.  So, we should solve all together.

Actually, the latest posted version didn't have the mixer problem I
had before (I haven't looked in detail at what was different). But I
agree using a different substream for a different output isn't ideal
since there's no way for software to detect that this is the case. Can
it be a separate PCM like hw:0,2 or something?

Hopefully VIA will also look into the SPDIF no-output problem I have
with VT1828S..

>
> On most machines, it's not too big deal to have it the secondary digital
> as a slave.  If this really matters, we can add another hint to make
> the individual digital substreams conditionally.
>
> Anyway, please check the latest sound GIT tree (or alsa-driver snapshot)
> whether it works.  I only tested the compilation, so far.
>
>
> thanks,
>
> Takashi
>