ALSA playback seems to be more reliable if the .pointer() hook reports
a value slightly into the period, rather than right on the period
boundary. This patch adds a fudge factor of 1/4 the period size
to better estimate the actual position of the DMA engine in the
audio buffer.
Signed-off-by: Grant Likely <grant.lik...@secretlab.ca>
---
sound/soc/fsl/mpc5200_dma.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/sound/soc/fsl/mpc5200_dma.c b/sound/soc/fsl/mpc5200_dma.c
index 9c88e15..ee5a606 100644
--- a/sound/soc/fsl/mpc5200_dma.c
+++ b/sound/soc/fsl/mpc5200_dma.c
@@ -297,7 +297,7 @@ psc_dma_pointer(struct snd_pcm_substream *substream)
else
s = &psc_dma->playback;
- count = s->period_current * s->period_bytes;
+ count = (s->period_current * s->period_bytes) + (s->period_bytes >> 2);
return bytes_to_frames(substream->runtime, count);
}
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