Mailinglist Archive: radeonhd (333 mails)

["Rafał Miłecki" <zajec5@xxxxxxxxx>]

2008/10/8 Anders Eriksson <aeriksson@xxxxxxxxxxx>:
> zajec5@xxxxxxxxx said:
> > I guess it's Alsa that detects audio device on GPU and transferrs audio to it
> > (for example by setting "device" in MPlayer).
> Aha. So Alsa does this already today? It's just that it never leaves the card?
Right. That's what patch introduces: it let audio "leave the card" :)


> > But radeonhd has to enable this
> > audio output in HDMI and set timing registers. Try to use "mplayer -ao
> > alse:device=hw=X.Y" WITHOUT HDMI connected.
> What should X and Y be?
Type command:
> aplay -l (-l is small L)
You will find something like
> card 1: HDMI [HDA ATI HDMI], device 3: ATI HDMI [ATI HDMI]
so in this case X is 1 and Y is 3:
> mplayer -ao alse:device=hw=1.3


> > 1. Switching to other VT and back kills playing Audio. The key word here is
> > "back". When I switch to console audio stops playing - that's fine. But when
> > I switch again to X I expect audio to resume playing.
> Ok. Then we have different expectations. I expect audio to be orthogonal to
> the VT selection. If anything it's a _policy_ decision if you want to have
> "audio follows VT selection". It shouldn't be enforced by the architecture.
Don't know if this is even possible. Let's wait for Christian's answer.


> > Fianlly I also do not understand you :) You're happy to test it, but does it
> > actually work for you?
>
> Remains to be seen. I'm happy to test it after work. We'll see what comes out
> of it.
OK, let us know later please. If you don't want to play with all that
-ao alsa:device=hw=X.Y you may use SMPlayer from SVN (probably need to
compile yourself). It allows you to select alsa device in Preferences.


> Making an audio driver inside the X driver just seems odd to me.
As I said it's not standard audio driver. It just plays with registers
on GPU to let audio be transmitted thought HDMI. The real audio driver
is still Alsa.


> How come all of this is not in the kernel? Together with e.g. modesetting?
Don't ask me :)


-- 
Rafał Miłecki