[alsa-devel] [patch][saa7134] do not change mute state for capturing audio

[Stas Sergeev]

15.07.2011 05:38, Mauro Carvalho Chehab wrote:
> If you want, feel free to propose a patch fixing that logic at saa7134, instead
> of just removing it.
Hi, I've just verified that pulseaudio indeed does
the sound capturing on startup:
---
saa7134[0]/alsa: saa7134[0] at 0xfe8fb800 irq 22 registered as card 2
saa7134[0]/alsa: rec_start: afmt=2 ch=1  =>  fmt=0xcd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=1  =>  fmt=0xcd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=2  =>  fmt=0xdd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=2  =>  fmt=0xdd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=2  =>  fmt=0xdd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=2  =>  fmt=0xdd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=1  =>  fmt=0xcd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=1  =>  fmt=0xcd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=2  =>  fmt=0xdd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=2  =>  fmt=0xdd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=2  =>  fmt=0xdd swap=-
saa7134[0]/alsa: rec_start: afmt=2 ch=2  =>  fmt=0xdd swap=-
saa7134[0]/alsa: irq: field oops [even]
---

So your proposal is not going to fix anything at all.

Can we get back to discussing/applying mine then?
And if the other drivers has that autounmute logic,
then I suggest removing it there as well. You have
not named any use-case for it, so I think there is none.
I also think that the whole auto-unmute logic in your
drivers is entirely flawed: for instance, I don't think
recording from the sound card will automatically
unmute its line-in or something else, so you are probably
not following the generic alsa style here.
I am adding alsa-devel to CC to find out what they
think about that whole auto-unmute question.