ALSA: hda - Add codec delay to the capture time stamp.
For capture, the delay through the codec contributes to the time stamp
of the sample recorded at the A to D. Rename the codec time stamp
function appropriately.
Signed-off-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 63734b5..7b213d5 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1889,7 +1889,7 @@
tc->cycle_last = last;
}
-static u64 azx_subtract_codec_delay(struct snd_pcm_substream *substream,
+static u64 azx_adjust_codec_delay(struct snd_pcm_substream *substream,
u64 nsec)
{
struct azx_pcm *apcm = snd_pcm_substream_chip(substream);
@@ -1903,6 +1903,9 @@
codec_nsecs = div_u64(codec_frames * 1000000000LL,
substream->runtime->rate);
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ return nsec + codec_nsecs;
+
return (nsec > codec_nsecs) ? nsec - codec_nsecs : 0;
}
@@ -1914,7 +1917,7 @@
nsec = timecounter_read(&azx_dev->azx_tc);
nsec = div_u64(nsec, 3); /* can be optimized */
- nsec = azx_subtract_codec_delay(substream, nsec);
+ nsec = azx_adjust_codec_delay(substream, nsec);
*ts = ns_to_timespec(nsec);