[ALSA] Timer API - added SUSPEND/RESUME events

PCM Midlevel,Timer Midlevel,ALSA Core
- added SNDRV_TIMER_EVENT_SUSPEND / RESUME events
- changed timer events from PAUSE / CONTINUE in PCM midlevel to SUSPEND / RESUME
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

include/sound/asound.h

@@ -560,7 +560,7 @@ enum {
  *  Timer section - /dev/snd/timer
  */
 
-#define SNDRV_TIMER_VERSION		SNDRV_PROTOCOL_VERSION(2, 0, 4)
+#define SNDRV_TIMER_VERSION		SNDRV_PROTOCOL_VERSION(2, 0, 5)
 
 enum sndrv_timer_class {
 	SNDRV_TIMER_CLASS_NONE = -1,
@@ -693,11 +693,15 @@ enum sndrv_timer_event {
 	SNDRV_TIMER_EVENT_CONTINUE,		/* val = resolution in ns */
 	SNDRV_TIMER_EVENT_PAUSE,		/* val = 0 */
 	SNDRV_TIMER_EVENT_EARLY,		/* val = 0, early event */
+	SNDRV_TIMER_EVENT_SUSPEND,		/* val = 0 */
+	SNDRV_TIMER_EVENT_RESUME,		/* val = 0 */
 	/* master timer events for slave timer instances */
 	SNDRV_TIMER_EVENT_MSTART = SNDRV_TIMER_EVENT_START + 10,
 	SNDRV_TIMER_EVENT_MSTOP = SNDRV_TIMER_EVENT_STOP + 10,
 	SNDRV_TIMER_EVENT_MCONTINUE = SNDRV_TIMER_EVENT_CONTINUE + 10,
 	SNDRV_TIMER_EVENT_MPAUSE = SNDRV_TIMER_EVENT_PAUSE + 10,
+	SNDRV_TIMER_EVENT_MSUSPEND = SNDRV_TIMER_EVENT_SUSPEND + 10,
+	SNDRV_TIMER_EVENT_MRESUME = SNDRV_TIMER_EVENT_RESUME + 10,
 };
 
 struct sndrv_timer_tread {

sound/core/pcm_native.c

@@ -1025,7 +1025,7 @@ static void snd_pcm_post_suspend(snd_pcm_substream_t *substream, int state)
 	snd_pcm_runtime_t *runtime = substream->runtime;
 	snd_pcm_trigger_tstamp(substream);
 	if (substream->timer)
-		snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MPAUSE, &runtime->trigger_tstamp);
+		snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND, &runtime->trigger_tstamp);
 	runtime->status->suspended_state = runtime->status->state;
 	runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
 	snd_pcm_tick_set(substream, 0);
@@ -1115,7 +1115,7 @@ static void snd_pcm_post_resume(snd_pcm_substream_t *substream, int state)
 	snd_pcm_runtime_t *runtime = substream->runtime;
 	snd_pcm_trigger_tstamp(substream);
 	if (substream->timer)
-		snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MCONTINUE, &runtime->trigger_tstamp);
+		snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME, &runtime->trigger_tstamp);
 	runtime->status->state = runtime->status->suspended_state;
 	if (runtime->sleep_min)
 		snd_pcm_tick_prepare(substream);

sound/core/timer.c

@@ -880,9 +880,11 @@ void snd_timer_notify(snd_timer_t *timer, enum sndrv_timer_event event, struct t
 	struct list_head *p, *n;
 
 	snd_runtime_check(timer->hw.flags & SNDRV_TIMER_HW_SLAVE, return);	
-	snd_assert(event >= SNDRV_TIMER_EVENT_MSTART && event <= SNDRV_TIMER_EVENT_MPAUSE, return);
+	snd_assert(event >= SNDRV_TIMER_EVENT_MSTART && event <= SNDRV_TIMER_EVENT_MRESUME, return);
 	spin_lock_irqsave(&timer->lock, flags);
-	if (event == SNDRV_TIMER_EVENT_MSTART || event == SNDRV_TIMER_EVENT_MCONTINUE) {
+	if (event == SNDRV_TIMER_EVENT_MSTART ||
+	    event == SNDRV_TIMER_EVENT_MCONTINUE ||
+	    event == SNDRV_TIMER_EVENT_MRESUME) {
 		if (timer->hw.c_resolution)
 			resolution = timer->hw.c_resolution(timer);
 		else
@@ -1555,10 +1557,14 @@ static int snd_timer_user_params(struct file *file, snd_timer_params_t __user *_
 			      (1<<SNDRV_TIMER_EVENT_STOP)|
 			      (1<<SNDRV_TIMER_EVENT_CONTINUE)|
 			      (1<<SNDRV_TIMER_EVENT_PAUSE)|
+			      (1<<SNDRV_TIMER_EVENT_SUSPEND)|
+			      (1<<SNDRV_TIMER_EVENT_RESUME)|
 			      (1<<SNDRV_TIMER_EVENT_MSTART)|
 			      (1<<SNDRV_TIMER_EVENT_MSTOP)|
 			      (1<<SNDRV_TIMER_EVENT_MCONTINUE)|
-			      (1<<SNDRV_TIMER_EVENT_MPAUSE))) {
+			      (1<<SNDRV_TIMER_EVENT_MPAUSE|
+			      (1<<SNDRV_TIMER_EVENT_MSUSPEND|
+			      (1<<SNDRV_TIMER_EVENT_MRESUME))) {
 		err = -EINVAL;
 		goto _end;
 	}