ASoC: SOF: sof-audio: Extend the optionality of IPC ops to IPC as well

The IPC ops are optional, but they require that the ops struct is to be
allocated with all callbacks set to NULL.

Update the code to extend the optionality to:
sdev->ipc == NULL
sdev->ipc->ops == NULL
sdev->ipc->ops->[ops_group] == NULL
sdev->ipc->ops->[pcmops_group]->ops == NULL (treated optional currently)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20221221102328.9635-7-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/sof-audio.c

@@ -16,12 +16,12 @@
 
 static void sof_reset_route_setup_status(struct snd_sof_dev *sdev, struct snd_sof_widget *widget)
 {
-	const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
+	const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
 	struct snd_sof_route *sroute;
 
 	list_for_each_entry(sroute, &sdev->route_list, list)
 		if (sroute->src_widget == widget || sroute->sink_widget == widget) {
-			if (sroute->setup && tplg_ops->route_free)
+			if (sroute->setup && tplg_ops && tplg_ops->route_free)
 				tplg_ops->route_free(sdev, sroute);
 
 			sroute->setup = false;
@@ -30,7 +30,7 @@ static void sof_reset_route_setup_status(struct snd_sof_dev *sdev, struct snd_so
 
 int sof_widget_free(struct snd_sof_dev *sdev, struct snd_sof_widget *swidget)
 {
-	const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
+	const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
 	int err = 0;
 	int ret;
 
@@ -47,7 +47,7 @@ int sof_widget_free(struct snd_sof_dev *sdev, struct snd_sof_widget *swidget)
 	sof_reset_route_setup_status(sdev, swidget);
 
 	/* continue to disable core even if IPC fails */
-	if (tplg_ops->widget_free)
+	if (tplg_ops && tplg_ops->widget_free)
 		err = tplg_ops->widget_free(sdev, swidget);
 
 	/*
@@ -82,7 +82,7 @@ EXPORT_SYMBOL(sof_widget_free);
 
 int sof_widget_setup(struct snd_sof_dev *sdev, struct snd_sof_widget *swidget)
 {
-	const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
+	const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
 	int ret;
 
 	/* skip if there is no private data */
@@ -124,7 +124,7 @@ int sof_widget_setup(struct snd_sof_dev *sdev, struct snd_sof_widget *swidget)
 	}
 
 	/* setup widget in the DSP */
-	if (tplg_ops->widget_setup) {
+	if (tplg_ops && tplg_ops->widget_setup) {
 		ret = tplg_ops->widget_setup(sdev, swidget);
 		if (ret < 0)
 			goto core_put;
@@ -134,7 +134,7 @@ int sof_widget_setup(struct snd_sof_dev *sdev, struct snd_sof_widget *swidget)
 	if (WIDGET_IS_DAI(swidget->id)) {
 		unsigned int flags = SOF_DAI_CONFIG_FLAGS_NONE;
 
-		if (tplg_ops->dai_config) {
+		if (tplg_ops && tplg_ops->dai_config) {
 			ret = tplg_ops->dai_config(sdev, swidget, flags, NULL);
 			if (ret < 0)
 				goto widget_free;
@@ -142,7 +142,7 @@ int sof_widget_setup(struct snd_sof_dev *sdev, struct snd_sof_widget *swidget)
 	}
 
 	/* restore kcontrols for widget */
-	if (tplg_ops->control->widget_kcontrol_setup) {
+	if (tplg_ops && tplg_ops->control && tplg_ops->control->widget_kcontrol_setup) {
 		ret = tplg_ops->control->widget_kcontrol_setup(sdev, swidget);
 		if (ret < 0)
 			goto widget_free;
@@ -169,7 +169,7 @@ EXPORT_SYMBOL(sof_widget_setup);
 int sof_route_setup(struct snd_sof_dev *sdev, struct snd_soc_dapm_widget *wsource,
 		    struct snd_soc_dapm_widget *wsink)
 {
-	const struct sof_ipc_tplg_ops *ipc_tplg_ops = sdev->ipc->ops->tplg;
+	const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
 	struct snd_sof_widget *src_widget = wsource->dobj.private;
 	struct snd_sof_widget *sink_widget = wsink->dobj.private;
 	struct snd_sof_route *sroute;
@@ -211,8 +211,8 @@ int sof_route_setup(struct snd_sof_dev *sdev, struct snd_soc_dapm_widget *wsourc
 	if (sroute->setup)
 		return 0;
 
-	if (ipc_tplg_ops->route_setup) {
-		int ret = ipc_tplg_ops->route_setup(sdev, sroute);
+	if (tplg_ops && tplg_ops->route_setup) {
+		int ret = tplg_ops->route_setup(sdev, sroute);
 
 		if (ret < 0)
 			return ret;
@@ -268,16 +268,17 @@ static int sof_setup_pipeline_connections(struct snd_sof_dev *sdev,
 static void
 sof_unprepare_widgets_in_path(struct snd_sof_dev *sdev, struct snd_soc_dapm_widget *widget)
 {
-	const struct sof_ipc_tplg_ops *ipc_tplg_ops = sdev->ipc->ops->tplg;
-	const struct sof_ipc_tplg_widget_ops *widget_ops = ipc_tplg_ops->widget;
+	const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
 	struct snd_sof_widget *swidget = widget->dobj.private;
+	const struct sof_ipc_tplg_widget_ops *widget_ops;
 	struct snd_soc_dapm_path *p;
 
 	/* return if the widget is in use or if it is already unprepared */
 	if (!swidget->prepared || swidget->use_count > 1)
 		return;
 
-	if (widget_ops[widget->id].ipc_unprepare)
+	widget_ops = tplg_ops ? tplg_ops->widget : NULL;
+	if (widget_ops && widget_ops[widget->id].ipc_unprepare)
 		/* unprepare the source widget */
 		widget_ops[widget->id].ipc_unprepare(swidget);
 
@@ -299,12 +300,16 @@ sof_prepare_widgets_in_path(struct snd_sof_dev *sdev, struct snd_soc_dapm_widget
 			    struct snd_sof_platform_stream_params *platform_params,
 			    struct snd_pcm_hw_params *pipeline_params, int dir)
 {
-	const struct sof_ipc_tplg_ops *ipc_tplg_ops = sdev->ipc->ops->tplg;
-	const struct sof_ipc_tplg_widget_ops *widget_ops = ipc_tplg_ops->widget;
+	const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
 	struct snd_sof_widget *swidget = widget->dobj.private;
+	const struct sof_ipc_tplg_widget_ops *widget_ops;
 	struct snd_soc_dapm_path *p;
 	int ret;
 
+	widget_ops = tplg_ops ? tplg_ops->widget : NULL;
+	if (!widget_ops)
+		return 0;
+
 	if (!widget_ops[widget->id].ipc_prepare || swidget->prepared)
 		goto sink_prepare;
 
@@ -485,7 +490,7 @@ int sof_widget_list_setup(struct snd_sof_dev *sdev, struct snd_sof_pcm *spcm,
 			  struct snd_sof_platform_stream_params *platform_params,
 			  int dir)
 {
-	const struct sof_ipc_tplg_ops *ipc_tplg_ops = sdev->ipc->ops->tplg;
+	const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
 	struct snd_soc_dapm_widget_list *list = spcm->stream[dir].list;
 	struct snd_soc_dapm_widget *widget;
 	int i, ret;
@@ -539,8 +544,8 @@ int sof_widget_list_setup(struct snd_sof_dev *sdev, struct snd_sof_pcm *spcm,
 		if (pipe_widget->complete)
 			continue;
 
-		if (ipc_tplg_ops->pipeline_complete) {
-			pipe_widget->complete = ipc_tplg_ops->pipeline_complete(sdev, pipe_widget);
+		if (tplg_ops && tplg_ops->pipeline_complete) {
+			pipe_widget->complete = tplg_ops->pipeline_complete(sdev, pipe_widget);
 			if (pipe_widget->complete < 0) {
 				ret = pipe_widget->complete;
 				goto widget_free;
@@ -628,11 +633,11 @@ bool snd_sof_stream_suspend_ignored(struct snd_sof_dev *sdev)
 int sof_pcm_stream_free(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream,
 			struct snd_sof_pcm *spcm, int dir, bool free_widget_list)
 {
-	const struct sof_ipc_pcm_ops *pcm_ops = sdev->ipc->ops->pcm;
+	const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
 	int ret;
 
 	/* Send PCM_FREE IPC to reset pipeline */
-	if (pcm_ops->hw_free && spcm->prepared[substream->stream]) {
+	if (pcm_ops && pcm_ops->hw_free && spcm->prepared[substream->stream]) {
 		ret = pcm_ops->hw_free(sdev->component, substream);
 		if (ret < 0)
 			return ret;
@@ -762,13 +767,13 @@ static int sof_dai_get_clk(struct snd_soc_pcm_runtime *rtd, int clk_type)
 	struct snd_sof_dai *dai =
 		snd_sof_find_dai(component, (char *)rtd->dai_link->name);
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
-	const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
+	const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
 
 	/* use the tplg configured mclk if existed */
 	if (!dai)
 		return 0;
 
-	if (tplg_ops->dai_get_clk)
+	if (tplg_ops && tplg_ops->dai_get_clk)
 		return tplg_ops->dai_get_clk(sdev, dai, clk_type);
 
 	return 0;