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From: "Mathieu Rondonneau" <mathieu.rondonneau@polymtl.ca>
To: alsa-devel@lists.sourceforge.net
Subject: using preallocate pci, isa or nothing?
Date: Fri, 6 Feb 2004 20:45:33 -0600	[thread overview]
Message-ID: <006d01c3ed24$75653b40$c4f9cb18@win2K> (raw)

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Hi all,

I'm writing an ALSA driver for a CSB337 board (AT91RM9200). There is no PCI or ISA on this board. Should I preallocate memory with: snd_pcm_lib_preallocate_pages_for_all, snd_pcm_lib_preallocate_isa_pages_for_all() or snd_pcm_lib_preallocate_pci_pages_for_all()?

There is a specific DMA (PDC) on the AT91RM9200, so i'm trying to use snd_pcm_lib_preallocate_pages_for_all() but seems complicated to understand what is needed by the ALSA pcm and what i have to write.
What does the function snd_..._pointer() mean? should i need it if i don't use ISA or PCI mecanism?
What does the function snd_pcm_period_elapsed() mean? Should i need it if i don't use ISA or PCI mecanism?

Thanks
any help would be very appreciate.

Mathieu Rondonneau

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             reply	other threads:[~2004-02-07  2:45 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-02-07  2:45 Mathieu Rondonneau [this message]
  -- strict thread matches above, loose matches on Subject: below --
2004-02-09  0:29 Using preallocate pci, isa or nothing? Mathieu Rondonneau
2004-02-11 12:25 ` Takashi Iwai
2004-02-11 20:39   ` Mathieu Rondonneau
2004-02-11 19:49     ` Takashi Iwai

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