SNDRV_PCM_IOCTL_TTSTAMP 662 sound/core/pcm_compat.c case SNDRV_PCM_IOCTL_TTSTAMP: SNDRV_PCM_IOCTL_TTSTAMP 2922 sound/core/pcm_native.c case SNDRV_PCM_IOCTL_TTSTAMP: