Commit 483cee77 authored Feb 23, 2011 by Adrian Knoth Committed by Takashi Iwai Feb 23, 2011

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>

parent 432d2500

sound/pci/rme9652/hdspm.c

+11 −2

Original line number	Diff line number	Diff line
		@@ -1231,8 +1231,17 @@ static snd_pcm_uframes_t hdspm_hw_pointer(struct hdspm *hdspm)
		int position;

		position = hdspm_read(hdspm, HDSPM_statusRegister);

		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;
		}