ASoC: SOF: pcm/Intel: Handle IPC dependent sequencing

Merge series from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>:

IPC3 and IPC4 firmwares handle and execute tasks at different
stages, like managing DMAs.  In most cases these are aligned, but
we have few exceptions that needs to be handled differently.

This series introduces flags to handle the differing cases to make sure that
the correct sequencing is used regerless of the IPC version.

sound/soc/sof/intel/hda-dai.c

@@ -305,7 +305,6 @@ static int hda_dai_trigger(struct snd_pcm_substream *substream, int cmd, struct
 
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_SUSPEND:
-	case SNDRV_PCM_TRIGGER_STOP:
 		ret = hda_link_dma_cleanup(substream, hext_stream, dai, codec_dai);
 		if (ret < 0) {
 			dev_err(sdev->dev, "%s: failed to clean up link DMA\n", __func__);

sound/soc/sof/ipc3-pcm.c

@@ -382,4 +382,5 @@ const struct sof_ipc_pcm_ops ipc3_pcm_ops = {
 	.hw_free = sof_ipc3_pcm_hw_free,
 	.trigger = sof_ipc3_pcm_trigger,
 	.dai_link_fixup = sof_ipc3_pcm_dai_link_fixup,
+	.reset_hw_params_during_stop = true,
 };

sound/soc/sof/ipc4-pcm.c

@@ -835,5 +835,6 @@ const struct sof_ipc_pcm_ops ipc4_pcm_ops = {
 	.dai_link_fixup = sof_ipc4_pcm_dai_link_fixup,
 	.pcm_setup = sof_ipc4_pcm_setup,
 	.pcm_free = sof_ipc4_pcm_free,
-	.delay = sof_ipc4_pcm_delay
+	.delay = sof_ipc4_pcm_delay,
+	.ipc_first_on_start = true
 };

sound/soc/sof/pcm.c

@@ -301,6 +301,8 @@ static int sof_pcm_trigger(struct snd_soc_component *component,
 		ipc_first = true;
 		break;
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (pcm_ops && pcm_ops->ipc_first_on_start)
+			ipc_first = true;
 		break;
 	case SNDRV_PCM_TRIGGER_START:
 		if (spcm->stream[substream->stream].suspend_ignored) {
@@ -312,6 +314,9 @@ static int sof_pcm_trigger(struct snd_soc_component *component,
 			spcm->stream[substream->stream].suspend_ignored = false;
 			return 0;
 		}
+
+		if (pcm_ops && pcm_ops->ipc_first_on_start)
+			ipc_first = true;
 		break;
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 		if (sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
@@ -328,26 +333,36 @@ static int sof_pcm_trigger(struct snd_soc_component *component,
 		fallthrough;
 	case SNDRV_PCM_TRIGGER_STOP:
 		ipc_first = true;
-		reset_hw_params = true;
+		if (pcm_ops && pcm_ops->reset_hw_params_during_stop)
+			reset_hw_params = true;
 		break;
 	default:
 		dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd);
 		return -EINVAL;
 	}
 
-	/*
-	 * DMA and IPC sequence is different for start and stop. Need to send
-	 * STOP IPC before stop DMA
-	 */
 	if (!ipc_first)
 		snd_sof_pcm_platform_trigger(sdev, substream, cmd);
 
 	if (pcm_ops && pcm_ops->trigger)
 		ret = pcm_ops->trigger(component, substream, cmd);
 
-	/* need to STOP DMA even if trigger IPC failed */
-	if (ipc_first)
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+	case SNDRV_PCM_TRIGGER_START:
+		/* invoke platform trigger to start DMA only if pcm_ops is successful */
+		if (ipc_first && !ret)
+			snd_sof_pcm_platform_trigger(sdev, substream, cmd);
+		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+	case SNDRV_PCM_TRIGGER_STOP:
+		/* invoke platform trigger to stop DMA even if pcm_ops failed */
 		snd_sof_pcm_platform_trigger(sdev, substream, cmd);
+		break;
+	default:
+		break;
+	}
 
 	/* free PCM if reset_hw_params is set and the STOP IPC is successful */
 	if (!ret && reset_hw_params)

sound/soc/sof/sof-audio.h

@@ -104,6 +104,10 @@ struct snd_sof_dai_config_data {
  * @pcm_free: Function pointer for PCM free that can be used for freeing any
  *	       additional memory in the SOF PCM stream structure
  * @delay: Function pointer for pcm delay calculation
+ * @reset_hw_params_during_stop: Flag indicating whether the hw_params should be reset during the
+ *				 STOP pcm trigger
+ * @ipc_first_on_start: Send IPC before invoking platform trigger during
+ *				START/PAUSE_RELEASE triggers
  */
 struct sof_ipc_pcm_ops {
 	int (*hw_params)(struct snd_soc_component *component, struct snd_pcm_substream *substream,
@@ -117,6 +121,8 @@ struct sof_ipc_pcm_ops {
 	void (*pcm_free)(struct snd_sof_dev *sdev, struct snd_sof_pcm *spcm);
 	snd_pcm_sframes_t (*delay)(struct snd_soc_component *component,
 				   struct snd_pcm_substream *substream);
+	bool reset_hw_params_during_stop;
+	bool ipc_first_on_start;
 };
 
 /**