ASoC: SOF: Introduce PCM setup/free PCM IPC ops

These will be used to perform IPC-specific PCM setup/free.
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Libin Yang <libin.yang@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230127120031.10709-8-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/sof-audio.h

@@ -85,6 +85,7 @@ struct snd_sof_widget;
 struct snd_sof_route;
 struct snd_sof_control;
 struct snd_sof_dai;
+struct snd_sof_pcm;
 
 struct snd_sof_dai_config_data {
 	int dai_index;
@@ -97,6 +98,10 @@ struct snd_sof_dai_config_data {
  * @hw_free: Function pointer for hw_free
  * @trigger: Function pointer for trigger
  * @dai_link_fixup: Function pointer for DAI link fixup
+ * @pcm_setup: Function pointer for IPC-specific PCM set up that can be used for allocating
+ *	       additional memory in the SOF PCM stream structure
+ * @pcm_free: Function pointer for PCM free that can be used for freeing any
+ *	       additional memory in the SOF PCM stream structure
  */
 struct sof_ipc_pcm_ops {
 	int (*hw_params)(struct snd_soc_component *component, struct snd_pcm_substream *substream,
@@ -106,6 +111,8 @@ struct sof_ipc_pcm_ops {
 	int (*trigger)(struct snd_soc_component *component,  struct snd_pcm_substream *substream,
 		       int cmd);
 	int (*dai_link_fixup)(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params);
+	int (*pcm_setup)(struct snd_sof_dev *sdev, struct snd_sof_pcm *spcm);
+	void (*pcm_free)(struct snd_sof_dev *sdev, struct snd_sof_pcm *spcm);
 };
 
 /**

sound/soc/sof/topology.c

@@ -1669,6 +1669,7 @@ static int sof_dai_load(struct snd_soc_component *scomp, int index,
 			struct snd_soc_tplg_pcm *pcm, struct snd_soc_dai *dai)
 {
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
+	const struct sof_ipc_pcm_ops *ipc_pcm_ops = sof_ipc_get_ops(sdev, pcm);
 	struct snd_soc_tplg_stream_caps *caps;
 	struct snd_soc_tplg_private *private = &pcm->priv;
 	struct snd_sof_pcm *spcm;
@@ -1696,6 +1697,13 @@ static int sof_dai_load(struct snd_soc_component *scomp, int index,
 	spcm->pcm = *pcm;
 	dev_dbg(scomp->dev, "tplg: load pcm %s\n", pcm->dai_name);
 
+	/* perform pcm set op */
+	if (ipc_pcm_ops && ipc_pcm_ops->pcm_setup) {
+		ret = ipc_pcm_ops->pcm_setup(sdev, spcm);
+		if (ret < 0)
+			return ret;
+	}
+
 	dai_drv->dobj.private = spcm;
 	list_add(&spcm->list, &sdev->pcm_list);
 
@@ -1773,6 +1781,8 @@ static int sof_dai_load(struct snd_soc_component *scomp, int index,
 static int sof_dai_unload(struct snd_soc_component *scomp,
 			  struct snd_soc_dobj *dobj)
 {
+	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
+	const struct sof_ipc_pcm_ops *ipc_pcm_ops = sof_ipc_get_ops(sdev, pcm);
 	struct snd_sof_pcm *spcm = dobj->private;
 
 	/* free PCM DMA pages */
@@ -1782,6 +1792,10 @@ static int sof_dai_unload(struct snd_soc_component *scomp,
 	if (spcm->pcm.capture)
 		snd_dma_free_pages(&spcm->stream[SNDRV_PCM_STREAM_CAPTURE].page_table);
 
+	/* perform pcm free op */
+	if (ipc_pcm_ops && ipc_pcm_ops->pcm_free)
+		ipc_pcm_ops->pcm_free(sdev, spcm);
+
 	/* remove from list and free spcm */
 	list_del(&spcm->list);
 	kfree(spcm);