Re: Problems with a PCM driver

[James Courtier-Dutton <James@superbug.demon.co.uk>]

Adrian McMenamin wrote:
> I am writing a PCM driver for the AICA device on the Sega Dreamcast for a 
> 2.6.0-testX kernel.
> 
> The driver is far from complete, but I am having various problems when I test 
> bits of it...
> 
> A simple write of a file gives me this...
> 
> /dev/snd # cat /test.txt > pcmC0D0p
> ALSA sound/sh/aica.c:165: In snd_aica_playback_open
> ALSA sound/sh/aica.c:80: Disabling AICA device
> ALSA sound/sh/aica.c:66: Enabling AICA device
> cat: write: File descriptor in bad state
> 
> The three snd_printk messages are just what I would expect but I am not sure 
> why I get the message about the file descriptor.
> 
Why don't you do instead: -
aplay test.txt

I don't think you can write to pcmC0D0p directly, you have to go via the 
alsa-lib.

Cheers
James




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