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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2015-02-06 15:55:50 -0600
committerTakashi Iwai <tiwai@suse.de>2015-02-09 16:01:21 +0100
commit0d59b814353d397ff5d00ac33acd536030252a98 (patch)
treef0204a290125e413b8ad4b07c89bcc231bd784c4
parente4940626defdf6c92da1052ad3f12741c1a28c90 (diff)
downloadop-kernel-dev-0d59b814353d397ff5d00ac33acd536030252a98.zip
op-kernel-dev-0d59b814353d397ff5d00ac33acd536030252a98.tar.gz
ALSA: pcm: don't override timestamp unconditionally
timestamp in RUNNING mode is already taken in update_hw_ptr routine, getting a new timestamp introduces offset between hw_ptr, audio_tstamp and system time Add else condition to read timestamp as fallback and only when enabled Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/core/pcm_native.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 932234d..4ecd35f 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -720,8 +720,11 @@ int snd_pcm_status(struct snd_pcm_substream *substream,
runtime->status->audio_tstamp;
goto _tstamp_end;
}
+ } else {
+ /* get tstamp only in fallback mode and only if enabled */
+ if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE)
+ snd_pcm_gettime(runtime, &status->tstamp);
}
- snd_pcm_gettime(runtime, &status->tstamp);
_tstamp_end:
status->appl_ptr = runtime->control->appl_ptr;
status->hw_ptr = runtime->status->hw_ptr;
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