* ALSA: How to create multiple cards?
@ 2010-08-06 3:11 Truong Hoang
2010-08-12 7:46 ` Paul Menzel
0 siblings, 1 reply; 2+ messages in thread
From: Truong Hoang @ 2010-08-06 3:11 UTC (permalink / raw)
To: alsa-devel
Hi all,
I have a problem that I need help from the ALSA experts.
I want to write an alsa shim .ko which creates multiple cards. Let's assume
2 cards. My program calls
snd_card_create() and snd_card_register() two times. I also has 1 PCM for
each of these card.
After install the .ko to the kernal, I see the /proc/asound has card0 and
card1. But the "aplay -l" sees only card0. The snd_card_next() only returns
0 (i.e. 1 card).
What did I miss in my program? The /dev/snd/ has only hwC0D0 and pcmD0C0p.
I am a beginner in ALSA, so I appreciate if you can give the explanation in
detail.
Thank you,
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: ALSA: How to create multiple cards?
2010-08-06 3:11 ALSA: How to create multiple cards? Truong Hoang
@ 2010-08-12 7:46 ` Paul Menzel
0 siblings, 0 replies; 2+ messages in thread
From: Paul Menzel @ 2010-08-12 7:46 UTC (permalink / raw)
To: alsa-devel
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Dear Truong,
Am Donnerstag, den 05.08.2010, 20:11 -0700 schrieb Truong Hoang:
> I have a problem that I need help from the ALSA experts.
>
> I want to write an alsa shim .ko which creates multiple cards. Let's assume
> 2 cards. My program calls
> snd_card_create() and snd_card_register() two times. I also has 1 PCM for
> each of these card.
>
> After install the .ko to the kernal, I see the /proc/asound has card0 and
> card1. But the "aplay -l" sees only card0. The snd_card_next() only returns
> 0 (i.e. 1 card).
> What did I miss in my program? The /dev/snd/ has only hwC0D0 and pcmD0C0p.
>
> I am a beginner in ALSA, so I appreciate if you can give the explanation in
> detail.
please attach your source code so the experts – not me – can point out
what is missing.
Thanks,
Paul
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2010-08-06 3:11 ALSA: How to create multiple cards? Truong Hoang
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