ASoC: soc-compress: Implement trigger FE-BE sequencing as with normal PCMs

The FE-BE trigger sequence should be dynamic, similarly how soc-pcm.c
dpcm_fe_dai_do_trigger() does it.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>

Author: ujfalusi

sound/soc/soc-compress.c

@@ -273,31 +273,90 @@ static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
 	return ret;
 }
 
-static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
+static int soc_compr_trigger_fe_be(struct snd_compr_stream *cstream, int cmd,
+				   bool fe_first)
 {
 	struct snd_soc_pcm_runtime *fe = cstream->private_data;
 	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(fe, 0);
+	int ret;
+
+	if (fe_first) {
+		dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
+			fe->dai_link->name, cmd);
+
+		ret = snd_soc_dai_compr_trigger(cpu_dai, cstream, cmd);
+		if (ret < 0)
+			goto out;
+
+		ret = snd_soc_component_compr_trigger(cstream, cmd);
+		if (ret < 0)
+			goto out;
+
+		ret = dpcm_be_dai_trigger(fe, cstream->direction, cmd);
+	} else {
+		dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
+			fe->dai_link->name, cmd);
+
+		ret = dpcm_be_dai_trigger(fe, cstream->direction, cmd);
+		if (ret < 0)
+			goto out;
+
+		ret = snd_soc_dai_compr_trigger(cpu_dai, cstream, cmd);
+		if (ret < 0)
+			goto out;
+
+		ret = snd_soc_component_compr_trigger(cstream, cmd);
+	}
+
+out:
+	return ret;
+}
+
+static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
+{
+	struct snd_soc_pcm_runtime *fe = cstream->private_data;
 	int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */
+	bool fe_first = true;
 	int ret;
 
 	if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
 	    cmd == SND_COMPR_TRIGGER_DRAIN)
 		return snd_soc_component_compr_trigger(cstream, cmd);
 
+	switch (fe->dai_link->trigger[stream]) {
+	case SND_SOC_DPCM_TRIGGER_PRE:
+		fe_first = true;
+		break;
+	case SND_SOC_DPCM_TRIGGER_POST:
+		fe_first = false;
+		break;
+	default:
+		break;
+	}
+
 	snd_soc_card_mutex_lock(fe->card);
 
-	ret = snd_soc_dai_compr_trigger(cpu_dai, cstream, cmd);
-	if (ret < 0)
-		goto out;
+	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		ret = soc_compr_trigger_fe_be(cstream, cmd, fe_first);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		ret = soc_compr_trigger_fe_be(cstream, cmd, !fe_first);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
 
-	ret = snd_soc_component_compr_trigger(cstream, cmd);
 	if (ret < 0)
 		goto out;
 
-	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
-
-	ret = dpcm_be_dai_trigger(fe, stream, cmd);
-
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME: