ASoC: SOF: Intel: hda: make sure DAI widget is set up before IPC

With the implementation of the dynamic pipeline feature, widgets
will only be setup when a PCM is opened during the
hw_params ioctl. The BE hw_params callback is responsible for
sending the DAI_CONFIG for the DAI widgets in the DSP.
With dynamic pipelines, the DAI widgets will need to set up
first before sending the DAI_CONFIG IPC in the BE hw_params.

Update the BE hw_params/hw_free callbacks for all ALH, HDA and SSP
DAIs to set up/free the DAI widget before/after DAI_CONFIG IPC.

Signed-off-by: Ranjani Sridharan <[e-mail]>
Reviewed-by: Guennadi Liakhovetski <[e-mail]>
Reviewed-by: Pierre-Louis Bossart <[e-mail]>
Reviewed-by: Kai Vehmanen <[e-mail]>
Signed-off-by: Daniel Baluta <[e-mail]>
Signed-off-by: Peter Ujfalusi <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

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

···
 	return 0;
 }
 
-/* Send DAI_CONFIG IPC to the DAI that matches the dai_name and direction */
-static int hda_link_config_ipc(struct sof_intel_hda_stream *hda_stream,
-			       const char *dai_name, int channel, int dir)
+/* Update config for the DAI widget */
+static struct sof_ipc_dai_config *hda_dai_update_config(struct snd_soc_dapm_widget *w,
+							int channel)
 {
+	struct snd_sof_widget *swidget = w->dobj.private;
 	struct sof_ipc_dai_config *config;
 	struct snd_sof_dai *sof_dai;
-	struct sof_ipc_reply reply;
-	int ret = 0;
 
-	list_for_each_entry(sof_dai, &hda_stream->sdev->dai_list, list) {
-		if (!sof_dai->cpu_dai_name)
-			continue;
+	if (!swidget)
+		return NULL;
 
-		if (!strcmp(dai_name, sof_dai->cpu_dai_name) &&
-		    dir == sof_dai->comp_dai.direction) {
-			config = sof_dai->dai_config;
+	sof_dai = swidget->private;
 
-			if (!config) {
-				dev_err(hda_stream->sdev->dev,
-					"error: no config for DAI %s\n",
-					sof_dai->name);
-				return -EINVAL;
-			}
-
-			/* update config with stream tag */
-			config->hda.link_dma_ch = channel;
-
-			/* send IPC */
-			ret = sof_ipc_tx_message(hda_stream->sdev->ipc,
-						 config->hdr.cmd,
-						 config,
-						 config->hdr.size,
-						 &reply, sizeof(reply));
-
-			if (ret < 0)
-				dev_err(hda_stream->sdev->dev,
-					"error: failed to set dai config for %s\n",
-					sof_dai->name);
-			return ret;
-		}
+	if (!sof_dai || !sof_dai->dai_config) {
+		dev_err(swidget->scomp->dev, "error: No config for DAI %s\n", w->name);
+		return NULL;
 	}
 
-	return -EINVAL;
+	config = &sof_dai->dai_config[sof_dai->current_config];
+
+	/* update config with stream tag */
+	config->hda.link_dma_ch = channel;
+
+	return config;
+}
+
+static int hda_link_config_ipc(struct sof_intel_hda_stream *hda_stream,
+			       struct snd_soc_dapm_widget *w, int channel)
+{
+	struct snd_sof_dev *sdev = hda_stream->sdev;
+	struct sof_ipc_dai_config *config;
+	struct sof_ipc_reply reply;
+
+	config = hda_dai_update_config(w, channel);
+	if (!config) {
+		dev_err(sdev->dev, "error: no config for DAI %s\n", w->name);
+		return -ENOENT;
+	}
+
+	/* send DAI_CONFIG IPC */
+	return sof_ipc_tx_message(sdev->ipc, config->hdr.cmd, config, config->hdr.size,
+				  &reply, sizeof(reply));
+}
+
+static int hda_link_dai_widget_update(struct sof_intel_hda_stream *hda_stream,
+				      struct snd_soc_dapm_widget *w,
+				      int channel, bool widget_setup)
+{
+	struct snd_sof_dev *sdev = hda_stream->sdev;
+	struct sof_ipc_dai_config *config;
+
+	config = hda_dai_update_config(w, channel);
+	if (!config) {
+		dev_err(sdev->dev, "error: no config for DAI %s\n", w->name);
+		return -ENOENT;
+	}
+
+	/* set up/free DAI widget and send DAI_CONFIG IPC */
+	if (widget_setup)
+		return hda_ctrl_dai_widget_setup(w);
+
+	return hda_ctrl_dai_widget_free(w);
 }
 
 static int hda_link_hw_params(struct snd_pcm_substream *substream,
···
 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 	struct sof_intel_hda_stream *hda_stream;
 	struct hda_pipe_params p_params = {0};
+	struct snd_soc_dapm_widget *w;
 	struct hdac_ext_link *link;
 	int stream_tag;
 	int ret;
···
 
 	hda_stream = hstream_to_sof_hda_stream(link_dev);
 
-	/* update the DSP with the new tag */
-	ret = hda_link_config_ipc(hda_stream, dai->name, stream_tag - 1,
-				  substream->stream);
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		w = dai->playback_widget;
+	else
+		w = dai->capture_widget;
+
+	/* set up the DAI widget and send the DAI_CONFIG with the new tag */
+	ret = hda_link_dai_widget_update(hda_stream, w, stream_tag - 1, true);
 	if (ret < 0)
 		return ret;
 
···
 				snd_soc_dai_get_dma_data(dai, substream);
 	struct sof_intel_hda_stream *hda_stream;
 	struct snd_soc_pcm_runtime *rtd;
+	struct snd_soc_dapm_widget *w;
 	struct hdac_ext_link *link;
 	struct hdac_stream *hstream;
 	struct hdac_bus *bus;
···
 		break;
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_STOP:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			w = dai->playback_widget;
+		else
+			w = dai->capture_widget;
+
 		/*
 		 * clear link DMA channel. It will be assigned when
 		 * hw_params is set up again after resume.
 		 */
-		ret = hda_link_config_ipc(hda_stream, dai->name,
-					  DMA_CHAN_INVALID, substream->stream);
+		ret = hda_link_config_ipc(hda_stream, w, DMA_CHAN_INVALID);
 		if (ret < 0)
 			return ret;
 
···
 	struct hdac_stream *hstream;
 	struct snd_soc_pcm_runtime *rtd;
 	struct hdac_ext_stream *link_dev;
+	struct snd_soc_dapm_widget *w;
 	int ret;
 
 	hstream = substream->runtime->private_data;
···
 
 	hda_stream = hstream_to_sof_hda_stream(link_dev);
 
-	/* free the link DMA channel in the FW */
-	ret = hda_link_config_ipc(hda_stream, dai->name, DMA_CHAN_INVALID,
-				  substream->stream);
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		w = dai->playback_widget;
+	else
+		w = dai->capture_widget;
+
+	/* free the link DMA channel in the FW and the DAI widget */
+	ret = hda_link_dai_widget_update(hda_stream, w, DMA_CHAN_INVALID, false);
 	if (ret < 0)
 		return ret;
 
···
 
 #endif
 
-static int ssp_dai_hw_params(struct snd_pcm_substream *substream,
-			     struct snd_pcm_hw_params *params,
-			     struct snd_soc_dai *dai)
+static int ssp_dai_setup_or_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai,
+				 bool setup)
 {
-	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
-	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
-	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
-	struct sof_ipc_fw_version *v = &sdev->fw_ready.version;
-	struct sof_ipc_dai_config *config;
-	struct snd_sof_dai *sof_dai;
-	struct sof_ipc_reply reply;
-	int ret;
+	struct snd_soc_component *component;
+	struct snd_sof_widget *swidget;
+	struct snd_soc_dapm_widget *w;
+	struct sof_ipc_fw_version *v;
+	struct snd_sof_dev *sdev;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		w = dai->playback_widget;
+	else
+		w = dai->capture_widget;
+
+	swidget = w->dobj.private;
+	component = swidget->scomp;
+	sdev = snd_soc_component_get_drvdata(component);
+	v = &sdev->fw_ready.version;
 
 	/* DAI_CONFIG IPC during hw_params is not supported in older firmware */
 	if (v->abi_version < SOF_ABI_VER(3, 18, 0))
 		return 0;
 
-	list_for_each_entry(sof_dai, &sdev->dai_list, list) {
-		if (!sof_dai->cpu_dai_name || !sof_dai->dai_config)
-			continue;
+	if (setup)
+		return hda_ctrl_dai_widget_setup(w);
 
-		if (!strcmp(dai->name, sof_dai->cpu_dai_name) &&
-		    substream->stream == sof_dai->comp_dai.direction) {
-			config = &sof_dai->dai_config[sof_dai->current_config];
+	return hda_ctrl_dai_widget_free(w);
+}
 
-			/* send IPC */
-			ret = sof_ipc_tx_message(sdev->ipc, config->hdr.cmd, config,
-						 config->hdr.size, &reply, sizeof(reply));
+static int ssp_dai_hw_params(struct snd_pcm_substream *substream,
+			     struct snd_pcm_hw_params *params,
+			     struct snd_soc_dai *dai)
+{
+	return ssp_dai_setup_or_free(substream, dai, true);
+}
 
-			if (ret < 0)
-				dev_err(sdev->dev, "error: failed to set DAI config for %s\n",
-					sof_dai->name);
-			return ret;
-		}
-	}
-
-	return 0;
+static int ssp_dai_hw_free(struct snd_pcm_substream *substream,
+			   struct snd_soc_dai *dai)
+{
+	return ssp_dai_setup_or_free(substream, dai, false);
 }
 
 static const struct snd_soc_dai_ops ssp_dai_ops = {
 	.hw_params = ssp_dai_hw_params,
+	.hw_free = ssp_dai_hw_free,
 };
 
 /*

sound/soc/sof/intel/hda.c

···
 	return chip_info;
 }
 
+int hda_ctrl_dai_widget_setup(struct snd_soc_dapm_widget *w)
+{
+	struct snd_sof_widget *swidget = w->dobj.private;
+	struct snd_soc_component *component = swidget->scomp;
+	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
+	struct sof_ipc_dai_config *config;
+	struct snd_sof_dai *sof_dai;
+	struct sof_ipc_reply reply;
+	int ret;
+
+	sof_dai = swidget->private;
+
+	if (!sof_dai || !sof_dai->dai_config) {
+		dev_err(sdev->dev, "No config for DAI %s\n", w->name);
+		return -EINVAL;
+	}
+
+	config = &sof_dai->dai_config[sof_dai->current_config];
+
+	/*
+	 * For static pipelines, the DAI widget would already be set up and calling
+	 * sof_widget_setup() simply returns without doing anything.
+	 * For dynamic pipelines, the DAI widget will be set up now.
+	 */
+	ret = sof_widget_setup(sdev, swidget);
+	if (ret < 0) {
+		dev_err(sdev->dev, "error: failed setting up DAI widget %s\n", w->name);
+		return ret;
+	}
+
+	/* send DAI_CONFIG IPC */
+	ret = sof_ipc_tx_message(sdev->ipc, config->hdr.cmd, config, config->hdr.size,
+				 &reply, sizeof(reply));
+	if (ret < 0) {
+		dev_err(sdev->dev, "error: failed setting DAI config for %s\n", w->name);
+		return ret;
+	}
+
+	sof_dai->configured = true;
+
+	return 0;
+}
+
+int hda_ctrl_dai_widget_free(struct snd_soc_dapm_widget *w)
+{
+	struct snd_sof_widget *swidget = w->dobj.private;
+	struct snd_soc_component *component = swidget->scomp;
+	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
+	struct sof_ipc_dai_config *config;
+	struct snd_sof_dai *sof_dai;
+	struct sof_ipc_reply reply;
+	int ret;
+
+	sof_dai = swidget->private;
+
+	if (!sof_dai || !sof_dai->dai_config) {
+		dev_err(sdev->dev, "error: No config to free DAI %s\n", w->name);
+		return -EINVAL;
+	}
+
+	/* nothing to do if hw_free() is called without restarting the stream after resume. */
+	if (!sof_dai->configured)
+		return 0;
+
+	config = &sof_dai->dai_config[sof_dai->current_config];
+
+	ret = sof_ipc_tx_message(sdev->ipc, config->hdr.cmd, config, config->hdr.size,
+				 &reply, sizeof(reply));
+	if (ret < 0)
+		dev_err(sdev->dev, "error: failed resetting DAI config for %s\n", w->name);
+
+	/*
+	 * Reset the configured_flag and free the widget even if the IPC fails to keep
+	 * the widget use_count balanced
+	 */
+	sof_dai->configured = false;
+
+	return sof_widget_free(sdev, swidget);
+}
+
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_INTEL_SOUNDWIRE)
 
 /*
···
 module_param(sdw_clock_stop_quirks, int, 0444);
 MODULE_PARM_DESC(sdw_clock_stop_quirks, "SOF SoundWire clock stop quirks");
 
+static int sdw_dai_config_ipc(struct snd_sof_dev *sdev,
+			      struct snd_soc_dapm_widget *w,
+			      int link_id, int alh_stream_id, int dai_id, bool setup)
+{
+	struct snd_sof_widget *swidget = w->dobj.private;
+	struct sof_ipc_dai_config *config;
+	struct snd_sof_dai *sof_dai;
+
+	if (!swidget) {
+		dev_err(sdev->dev, "error: No private data for widget %s\n", w->name);
+		return -EINVAL;
+	}
+
+	sof_dai = swidget->private;
+
+	if (!sof_dai || !sof_dai->dai_config) {
+		dev_err(sdev->dev, "error: No config for DAI %s\n", w->name);
+		return -EINVAL;
+	}
+
+	config = &sof_dai->dai_config[sof_dai->current_config];
+
+	/* update config with link and stream ID */
+	config->dai_index = (link_id << 8) | dai_id;
+	config->alh.stream_id = alh_stream_id;
+
+	if (setup)
+		return hda_ctrl_dai_widget_setup(w);
+
+	return hda_ctrl_dai_widget_free(w);
+}
+
 static int sdw_params_stream(struct device *dev,
 			     struct sdw_intel_stream_params_data *params_data)
 {
+	struct snd_pcm_substream *substream = params_data->substream;
 	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
 	struct snd_soc_dai *d = params_data->dai;
-	struct sof_ipc_dai_config config;
-	struct sof_ipc_reply reply;
-	int link_id = params_data->link_id;
-	int alh_stream_id = params_data->alh_stream_id;
-	int ret;
-	u32 size = sizeof(config);
+	struct snd_soc_dapm_widget *w;
 
-	memset(&config, 0, size);
-	config.hdr.size = size;
-	config.hdr.cmd = SOF_IPC_GLB_DAI_MSG | SOF_IPC_DAI_CONFIG;
-	config.type = SOF_DAI_INTEL_ALH;
-	config.dai_index = (link_id << 8) | (d->id);
-	config.alh.stream_id = alh_stream_id;
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		w = d->playback_widget;
+	else
+		w = d->capture_widget;
 
-	/* send message to DSP */
-	ret = sof_ipc_tx_message(sdev->ipc,
-				 config.hdr.cmd, &config, size, &reply,
-				 sizeof(reply));
-	if (ret < 0) {
-		dev_err(sdev->dev,
-			"error: failed to set DAI hw_params for link %d dai->id %d ALH %d\n",
-			link_id, d->id, alh_stream_id);
-	}
-
-	return ret;
+	return sdw_dai_config_ipc(sdev, w, params_data->link_id, params_data->alh_stream_id,
+				  d->id, true);
 }
 
 static int sdw_free_stream(struct device *dev,
 			   struct sdw_intel_stream_free_data *free_data)
 {
+	struct snd_pcm_substream *substream = free_data->substream;
 	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
 	struct snd_soc_dai *d = free_data->dai;
-	struct sof_ipc_dai_config config;
-	struct sof_ipc_reply reply;
-	int link_id = free_data->link_id;
-	int ret;
-	u32 size = sizeof(config);
+	struct snd_soc_dapm_widget *w;
 
-	memset(&config, 0, size);
-	config.hdr.size = size;
-	config.hdr.cmd = SOF_IPC_GLB_DAI_MSG | SOF_IPC_DAI_CONFIG;
-	config.type = SOF_DAI_INTEL_ALH;
-	config.dai_index = (link_id << 8) | d->id;
-	config.alh.stream_id = 0xFFFF; /* invalid value on purpose */
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		w = d->playback_widget;
+	else
+		w = d->capture_widget;
 
-	/* send message to DSP */
-	ret = sof_ipc_tx_message(sdev->ipc,
-				 config.hdr.cmd, &config, size, &reply,
-				 sizeof(reply));
-	if (ret < 0) {
-		dev_err(sdev->dev,
-			"error: failed to free stream for link %d dai->id %d\n",
-			link_id, d->id);
-	}
-
-	return ret;
+	/* send invalid stream_id */
+	return sdw_dai_config_ipc(sdev, w, free_data->link_id, 0xFFFF, d->id, false);
 }
 
 static const struct sdw_intel_ops sdw_callback = {

sound/soc/sof/intel/hda.h

···
 /* PCI driver selection and probe */
 int hda_pci_intel_probe(struct pci_dev *pci, const struct pci_device_id *pci_id);
 
+struct snd_sof_dai;
+struct sof_ipc_dai_config;
+int hda_ctrl_dai_widget_setup(struct snd_soc_dapm_widget *w);
+int hda_ctrl_dai_widget_free(struct snd_soc_dapm_widget *w);
+
 #endif

sound/soc/sof/sof-audio.c

···
 			return -ENOMEM;
 
 		dai = swidget->private;
+		dai->configured = false;
 		memcpy(comp, &dai->comp_dai, sizeof(struct sof_ipc_comp_dai));
 
 		/* append extended data to the end of the component */

sound/soc/sof/sof-audio.h

···
 struct snd_sof_dai {
 	struct snd_soc_component *scomp;
 	const char *name;
-	const char *cpu_dai_name;
 
 	struct sof_ipc_comp_dai comp_dai;
 	int number_configs;
 	int current_config;
+	bool configured; /* DAI configured during BE hw_params */
 	struct sof_ipc_dai_config *dai_config;
 	struct list_head list;	/* list in sdev dai list */
 };

sound/soc/sof/topology.c

···
 			if (!dai->dai_config)
 				return -ENOMEM;
 
-			/* set cpu_dai_name */
-			dai->cpu_dai_name = link->cpus->dai_name;
-
 			found = 1;
 		}
 	}