[ALSA] Use posix clock monotonic for PCM and timer timestamps
We need an accurate and continuous (monotonic) time sources to do
accurate synchronization among more timing sources. This patch allows
to enable monotonic timestamps for ALSA PCM devices and enables monotonic
timestamps for ALSA timer devices.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 93d7ca5..db3d7e9 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -188,7 +188,7 @@
snd_pcm_sframes_t delta;
if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_MMAP)
- getnstimeofday((struct timespec *)&runtime->status->tstamp);
+ snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
if (pos == SNDRV_PCM_POS_XRUN) {
xrun(substream);