ASoC: SOF: IPC: Introduce IPC ops

In preparation for supporting a new IPC version that will be introduced
in the SOF firmware, add a new set of ops that will be version specific.

For now, the IPC ops contain only the topology-related ops for setting
up widgets and pipeline connections. It will be expanded later to also
abstract the IPC-specific items in the component driver and DAI driver.
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220314200520.1233427-4-ranjani.sridharan@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/sof-audio.h

@@ -30,6 +30,42 @@
 
 #define WIDGET_IS_DAI(id) ((id) == snd_soc_dapm_dai_in || (id) == snd_soc_dapm_dai_out)
 
+struct snd_sof_widget;
+struct snd_sof_route;
+
+/**
+ * struct sof_ipc_tplg_widget_ops - IPC-specific ops for topology widgets
+ * @ipc_setup: Function pointer for setting up widget IPC params
+ * @ipc_free: Function pointer for freeing widget IPC params
+ * @token_list: List of token ID's that should be parsed for the widget
+ * @token_list_size: number of elements in token_list
+ * @bind_event: Function pointer for binding events to the widget
+ */
+struct sof_ipc_tplg_widget_ops {
+	int (*ipc_setup)(struct snd_sof_widget *swidget);
+	void (*ipc_free)(struct snd_sof_widget *swidget);
+	enum sof_tokens *token_list;
+	int token_list_size;
+	int (*bind_event)(struct snd_soc_component *scomp, struct snd_sof_widget *swidget,
+			  u16 event_type);
+};
+
+/**
+ * struct sof_ipc_tplg_ops - IPC-specific topology ops
+ * @widget: Array of pointers to IPC-specific ops for widgets. This should always be of size
+ *	    SND_SOF_DAPM_TYPE_COUNT i.e one per widget type. Unsupported widget types will be
+ *	    initialized to 0.
+ * @route_setup: Function pointer for setting up pipeline connections
+ * @token_list: List of all tokens supported by the IPC version. The size of the token_list
+ *		array should be SOF_TOKEN_COUNT. The unused elements in the array will be
+ *		initialized to 0.
+ */
+struct sof_ipc_tplg_ops {
+	const struct sof_ipc_tplg_widget_ops *widget;
+	int (*route_setup)(struct snd_sof_dev *sdev, struct snd_sof_route *sroute);
+	const struct sof_token_info *token_list;
+};
+
 /** struct snd_sof_tuple - Tuple info
  * @token:	Token ID
  * @value:	union of a string or a u32 values

sound/soc/sof/sof-priv.h

@@ -360,6 +360,16 @@ struct snd_sof_ipc_msg {
 	bool ipc_complete;
 };
 
+struct sof_ipc_tplg_ops;
+
+/**
+ * struct sof_ipc_ops - IPC-specific ops
+ * @tplg:	Pointer to IPC-specific topology ops
+ */
+struct sof_ipc_ops {
+	const struct sof_ipc_tplg_ops *tplg;
+};
+
 /* SOF generic IPC data */
 struct snd_sof_ipc {
 	struct snd_sof_dev *sdev;
@@ -370,6 +380,9 @@ struct snd_sof_ipc {
 	bool disable_ipc_tx;
 
 	struct snd_sof_ipc_msg msg;
+
+	/* IPC ops based on version */
+	const struct sof_ipc_ops *ops;
 };
 
 /*