ALSA: hdspm - Fix buffer handling on RME MADI/MADIface/AES(32)
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>
diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 9258897..509a35a 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -1231,8 +1231,17 @@
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;
}