Commit ed610af8 authored by Pierre-Louis Bossart's avatar Pierre-Louis Bossart Committed by Takashi Iwai

ALSA: hda: read trigger_timestamp immediately after starting DMA

Make sure wallclock counter and trigger timestamp are read very
close to each other for better alignment.
Signed-off-by: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 2b79d7a6
...@@ -657,6 +657,9 @@ static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) ...@@ -657,6 +657,9 @@ static int azx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
azx_writel(chip, SSYNC, azx_readl(chip, SSYNC) & ~sbits); azx_writel(chip, SSYNC, azx_readl(chip, SSYNC) & ~sbits);
if (start) { if (start) {
azx_timecounter_init(substream, 0, 0); azx_timecounter_init(substream, 0, 0);
snd_pcm_gettime(substream->runtime, &substream->runtime->trigger_tstamp);
substream->runtime->trigger_tstamp_latched = true;
if (nsync > 1) { if (nsync > 1) {
cycle_t cycle_last; cycle_t cycle_last;
......
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