Re: ioctl32 on ppc64

[Takashi Iwai <tiwai@suse.de>]

At Mon, 13 Sep 2004 03:21:07 +0200,
Juergen Kreileder wrote:
> 
> Hi,
> 
> I'm trying to get an Audigy NX working with a ppc64 kernel (2.6.9-rc1)
> and 32-bit userland.  ALSA seems to work fine (except for dmix) with
> 32-bit kernels + 32-bit userland and 64-bit kernels + 64 userland.
> 
> With mixed a mixed 32-bit/64-bit environment I wasn't able to run
> alsactl/amixer/alsamixer initially:
> 
> ,----
> | ioctl32(alsactl:2581): Unknown cmd fd(3) cmd(c2c85513){02} arg(ffffe6e0) on /dev/snd/controlC0
> | ioctl32(amixer:2582): Unknown cmd fd(3) cmd(c2c85512){02} arg(ffffe180) on /dev/snd/controlC0
> | ioctl32(alsactl:2584): Unknown cmd fd(3) cmd(c2c85513){02} arg(ffffe6e0) on /dev/snd/controlC0
> `----
> 
> After removing the packed attribute from struct sndrv_ctl_elem_value32,
> 32-bit alsactl and alsamixer seem to work fine.

Thanks, I'll apply it after checking on x86-64 environment.


> I also can play 48000 Hz wav files with 32-bit aplay now, but playing
> 41000 Hz stuff only works directly to hw:0,0 (sounds broken).
> Doing rate conversion with a plugin defined in .asoundrc works for the
> pure 32-bit and 64-bit cases but not for the mixed 32-bit/64-bit case,
> it fails with "ALSA lib pcm_hw.c:549:(snd_pcm_hw_start)
> SNDRV_PCM_IOCTL_START failed: Broken pipe":

This is likely a problem of size incompatibility of mmapped records.
Sigh, this is a bit touch to fix...


> BTW, is anybody working on a driver for the built-in soundcard of the
> PowerMac G5?

I'd like to do but no time, so far (also no machine).  Sorry.


Takashi


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