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>

1 files changed, 11 insertions, 2 deletions

diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 92588975f580..509a35a881f5 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -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;
 }