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ALSA: hdspm - Fix buffer handling on RME MADI/MADIface/AES(32)

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Only RayDAT and AIO provide sane buffer pointers that can be used with
HDSPM_BufferPositionMask, on all other cards, this would result in a
wrong HW pointer leading to xruns and these messages:

[260808.916788] BUG: pcmC0D0p:0, pos = 2976, buffer size = 1024, period size = 512
[260808.961124] BUG: pcmC0D0c:0, pos = 4944, buffer size = 1024, period size = 512

Signed-off-by: Adrian Knoth <adi@drcomp.erfurt.thur.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Adrian Knoth 2011-02-23 11:43:09 +01:00 committed by Takashi Iwai
parent 432d2500ac
commit 483cee77d2
1 changed files with 11 additions and 2 deletions
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13
sound/pci/rme9652/hdspm.c
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@ -1231,8 +1231,17 @@ static snd_pcm_uframes_t hdspm_hw_pointer(struct hdspm *hdspm)
int position;
position = hdspm_read(hdspm, HDSPM_statusRegister);
position &= HDSPM_BufferPositionMask;
position /= 4; /* Bytes per sample */
switch (hdspm->io_type) {
case RayDAT:
case AIO:
position &= HDSPM_BufferPositionMask;
position /= 4; /* Bytes per sample */
break;
default:
position = (position & HDSPM_BufferID) ?
(hdspm->period_bytes / 4) : 0;
}
return position;
}