ASoC: SOF: ipc4-pcm: Define pcm_setup/free ops

Define the pcm_setup/pcm_free ops for IPC4. Define a new struct
snd_sof_pcm_stream_trigger_info and add a new field trigger_info of this
type to struct snd_sof_pcm_stream. This will be used to save the list of
pipelines that need to be triggered.
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/20230127120031.10709-9-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/ipc4-pcm.c

@@ -215,8 +215,44 @@ static int sof_ipc4_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd,
 	return 0;
 }
 
+static void sof_ipc4_pcm_free(struct snd_sof_dev *sdev, struct snd_sof_pcm *spcm)
+{
+	struct snd_sof_pcm_stream_pipeline_list *pipeline_list;
+	int stream;
+
+	for_each_pcm_streams(stream) {
+		pipeline_list = &spcm->stream[stream].pipeline_list;
+		kfree(pipeline_list->pipe_widgets);
+		pipeline_list->pipe_widgets = NULL;
+	}
+}
+
+static int sof_ipc4_pcm_setup(struct snd_sof_dev *sdev, struct snd_sof_pcm *spcm)
+{
+	struct snd_sof_pcm_stream_pipeline_list *pipeline_list;
+	struct sof_ipc4_fw_data *ipc4_data = sdev->private;
+	int stream;
+
+	for_each_pcm_streams(stream) {
+		pipeline_list = &spcm->stream[stream].pipeline_list;
+
+		/* allocate memory for max number of pipeline IDs */
+		pipeline_list->pipe_widgets = kcalloc(ipc4_data->max_num_pipelines,
+						      sizeof(struct snd_sof_widget *),
+						      GFP_KERNEL);
+		if (!pipeline_list->pipe_widgets) {
+			sof_ipc4_pcm_free(sdev, spcm);
+			return -ENOMEM;
+		}
+	}
+
+	return 0;
+}
+
 const struct sof_ipc_pcm_ops ipc4_pcm_ops = {
 	.trigger = sof_ipc4_pcm_trigger,
 	.hw_free = sof_ipc4_pcm_hw_free,
 	.dai_link_fixup = sof_ipc4_pcm_dai_link_fixup,
+	.pcm_setup = sof_ipc4_pcm_setup,
+	.pcm_free = sof_ipc4_pcm_free,
 };

sound/soc/sof/sof-audio.h

@@ -285,6 +285,16 @@ struct sof_token_info {
 	int count;
 };
 
+/**
+ * struct snd_sof_pcm_stream_pipeline_list - List of pipelines associated with a PCM stream
+ * @count: number of pipeline widgets in the @pipe_widgets array
+ * @pipe_widgets: array of pipeline widgets
+ */
+struct snd_sof_pcm_stream_pipeline_list {
+	u32 count;
+	struct snd_sof_widget **pipe_widgets;
+};
+
 /* PCM stream, mapped to FW component  */
 struct snd_sof_pcm_stream {
 	u32 comp_id;
@@ -300,6 +310,7 @@ struct snd_sof_pcm_stream {
 	 * active or not while suspending the stream
 	 */
 	bool suspend_ignored;
+	struct snd_sof_pcm_stream_pipeline_list pipeline_list;
 };
 
 /* ALSA SOF PCM device */