ALSA: usb-audio: Add SNDRV_PCM_TRIGGER_SUSPEND/RESUME to trigger functions

Missing SNDRV_PCM_TRIGGER_SUSPEND/RESUME, usb-audio can not enter suspend
since pcm was always running.

Change-Id: I0f7be7345f2b5c1bd42dad4c6fc4647c8636eed8
Signed-off-by: zain wang <wzz@rock-chips.com>

Author: zainwangrockchips

sound/usb/pcm.c

@@ -272,15 +272,16 @@ static int start_endpoints(struct snd_usb_substream *subs)
 
 static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
 {
-	if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
+	if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
 		snd_usb_endpoint_stop(subs->sync_endpoint);
+		if (wait)
+			snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
+	}
 
-	if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
+	if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
 		snd_usb_endpoint_stop(subs->data_endpoint);
-
-	if (wait) {
-		snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
-		snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
+		if (wait)
+			snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
 	}
 }
 
@@ -1626,12 +1627,17 @@ static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substrea
 
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
 		subs->trigger_tstamp_pending_update = true;
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
 		subs->data_endpoint->retire_data_urb = retire_playback_urb;
 		subs->running = 1;
 		return 0;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		stop_endpoints(subs, true);
+		subs->running = 0;
+		return 0;
 	case SNDRV_PCM_TRIGGER_STOP:
 		stop_endpoints(subs, false);
 		subs->running = 0;
@@ -1655,13 +1661,18 @@ static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream
 
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
 		err = start_endpoints(subs);
 		if (err < 0)
 			return err;
 
 		subs->data_endpoint->retire_data_urb = retire_capture_urb;
 		subs->running = 1;
 		return 0;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		stop_endpoints(subs, true);
+		subs->running = 0;
+		return 0;
 	case SNDRV_PCM_TRIGGER_STOP:
 		stop_endpoints(subs, false);
 		subs->running = 0;