---

yaml
---
r: 81535
b: refs/heads/master
c: b751eef
h: refs/heads/master
i:
  81533: 5b8b965
  81531: 8dbf9c4
  81527: ab4f1cc
  81519: 84e7ff4
  81503: ff14774
  81471: 0e06ee7
  81407: 3b11ce1
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 25543fa785a32ce22e7374ba403eb6d38854d037
+refs/heads/master: b751eef1fdffca5532344285f2fad0c60d2f0158

trunk/include/sound/asound.h

@@ -138,7 +138,7 @@ enum {
  *                                                                           *
  *****************************************************************************/
 
-#define SNDRV_PCM_VERSION		SNDRV_PROTOCOL_VERSION(2, 0, 8)
+#define SNDRV_PCM_VERSION		SNDRV_PROTOCOL_VERSION(2, 0, 9)
 
 typedef unsigned long snd_pcm_uframes_t;
 typedef signed long snd_pcm_sframes_t;
@@ -434,10 +434,16 @@ struct snd_xfern {
 	snd_pcm_uframes_t frames;
 };
 
+enum {
+	SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY = 0,	/* gettimeofday equivalent */
+	SNDRV_PCM_TSTAMP_TYPE_MONOTONIC,	/* posix_clock_monotonic equivalent */
+	SNDRV_PCM_TSTAMP_TYPE_LAST = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC,
+};
+
 enum {
 	SNDRV_PCM_IOCTL_PVERSION = _IOR('A', 0x00, int),
 	SNDRV_PCM_IOCTL_INFO = _IOR('A', 0x01, struct snd_pcm_info),
-	SNDRV_PCM_IOCTL_TSTAMP = _IOW('A', 0x02, int),
+	SNDRV_PCM_IOCTL_TTSTAMP = _IOW('A', 0x03, int),
 	SNDRV_PCM_IOCTL_HW_REFINE = _IOWR('A', 0x10, struct snd_pcm_hw_params),
 	SNDRV_PCM_IOCTL_HW_PARAMS = _IOWR('A', 0x11, struct snd_pcm_hw_params),
 	SNDRV_PCM_IOCTL_HW_FREE = _IO('A', 0x12),

trunk/include/sound/pcm.h

@@ -323,6 +323,7 @@ struct snd_pcm_runtime {
 
 	/* -- timer -- */
 	unsigned int timer_resolution;	/* timer resolution */
+	int tstamp_type;		/* timestamp type */
 
 	/* -- DMA -- */           
 	unsigned char *dma_area;	/* DMA area */
@@ -952,6 +953,15 @@ void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
 void snd_pcm_timer_init(struct snd_pcm_substream *substream);
 void snd_pcm_timer_done(struct snd_pcm_substream *substream);
 
+static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
+				   struct timespec *tv)
+{
+	if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
+		do_posix_clock_monotonic_gettime(tv);
+	else
+		getnstimeofday(tv);
+}
+
 /*
  *  Memory
  */

trunk/sound/core/pcm_lib.c

@@ -188,7 +188,7 @@ static inline int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *subs
 	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);

trunk/sound/core/pcm_native.c

@@ -598,9 +598,9 @@ int snd_pcm_status(struct snd_pcm_substream *substream,
 		if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_MMAP)
 			status->tstamp = runtime->status->tstamp;
 		else
-			getnstimeofday(&status->tstamp);
+			snd_pcm_gettime(runtime, &status->tstamp);
 	} else
-		getnstimeofday(&status->tstamp);
+		snd_pcm_gettime(runtime, &status->tstamp);
 	status->appl_ptr = runtime->control->appl_ptr;
 	status->hw_ptr = runtime->status->hw_ptr;
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
@@ -688,7 +688,7 @@ static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 	if (runtime->trigger_master == NULL)
 		return;
 	if (runtime->trigger_master == substream) {
-		getnstimeofday(&runtime->trigger_tstamp);
+		snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 	} else {
 		snd_pcm_trigger_tstamp(runtime->trigger_master);
 		runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
@@ -2519,6 +2519,21 @@ static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
 		return -EFAULT;
 	return 0;
 }
+
+static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int arg;
+
+	if (get_user(arg, _arg))
+		return -EFAULT;
+	if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
+		return -EINVAL;
+	runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
+	if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
+		runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
+	return 0;
+}
 
 static int snd_pcm_common_ioctl1(struct file *file,
 				 struct snd_pcm_substream *substream,
@@ -2531,8 +2546,8 @@ static int snd_pcm_common_ioctl1(struct file *file,
 		return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
 	case SNDRV_PCM_IOCTL_INFO:
 		return snd_pcm_info_user(substream, arg);
-	case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
-		return 0;
+	case SNDRV_PCM_IOCTL_TTSTAMP:
+		return snd_pcm_tstamp(substream, arg);
 	case SNDRV_PCM_IOCTL_HW_REFINE:
 		return snd_pcm_hw_refine_user(substream, arg);
 	case SNDRV_PCM_IOCTL_HW_PARAMS:

trunk/sound/core/timer.c

@@ -44,11 +44,14 @@
 #endif
 
 static int timer_limit = DEFAULT_TIMER_LIMIT;
+static int timer_tstamp_monotonic = 1;
 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>");
 MODULE_DESCRIPTION("ALSA timer interface");
 MODULE_LICENSE("GPL");
 module_param(timer_limit, int, 0444);
 MODULE_PARM_DESC(timer_limit, "Maximum global timers in system.");
+module_param(timer_tstamp_monotonic, int, 0444);
+MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default).");
 
 struct snd_timer_user {
 	struct snd_timer_instance *timeri;
@@ -381,7 +384,10 @@ static void snd_timer_notify1(struct snd_timer_instance *ti, int event)
 	struct snd_timer_instance *ts;
 	struct timespec tstamp;
 
-	getnstimeofday(&tstamp);
+	if (timer_tstamp_monotonic)
+		do_posix_clock_monotonic_gettime(&tstamp);
+	else
+		getnstimeofday(&tstamp);
 	snd_assert(event >= SNDRV_TIMER_EVENT_START &&
 		   event <= SNDRV_TIMER_EVENT_PAUSE, return);
 	if (event == SNDRV_TIMER_EVENT_START ||
@@ -1182,8 +1188,12 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri,
 		spin_unlock(&tu->qlock);
 		return;
 	}
-	if (tu->last_resolution != resolution || ticks > 0)
-		getnstimeofday(&tstamp);
+	if (tu->last_resolution != resolution || ticks > 0) {
+		if (timer_tstamp_monotonic)
+			do_posix_clock_monotonic_gettime(&tstamp);
+		else
+			getnstimeofday(&tstamp);
+	}
 	if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) &&
 	    tu->last_resolution != resolution) {
 		r1.event = SNDRV_TIMER_EVENT_RESOLUTION;