ASoC: SOF: Intel: hda-dai: move code to deal with hda dai/dailink suspend

The location of the code was not optimal and prevents us from using
helpers, let's move it to hda-dai.c.

No functionality change in this patch.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220421203201.1550328-11-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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

@@ -448,6 +448,45 @@ static const struct snd_soc_dai_ops ipc3_hda_dai_ops = {
 	.prepare = ipc3_hda_dai_prepare,
 };
 
+static int hda_dai_suspend(struct hdac_bus *bus)
+{
+	struct snd_soc_pcm_runtime *rtd;
+	struct hdac_ext_stream *hext_stream;
+	struct hdac_ext_link *link;
+	struct hdac_stream *s;
+	const char *name;
+	int stream_tag;
+
+	/* set internal flag for BE */
+	list_for_each_entry(s, &bus->stream_list, list) {
+		hext_stream = stream_to_hdac_ext_stream(s);
+
+		/*
+		 * clear stream. This should already be taken care for running
+		 * streams when the SUSPEND trigger is called. But paused
+		 * streams do not get suspended, so this needs to be done
+		 * explicitly during suspend.
+		 */
+		if (hext_stream->link_substream) {
+			rtd = asoc_substream_to_rtd(hext_stream->link_substream);
+			name = asoc_rtd_to_codec(rtd, 0)->component->name;
+			link = snd_hdac_ext_bus_get_link(bus, name);
+			if (!link)
+				return -EINVAL;
+
+			hext_stream->link_prepared = 0;
+
+			if (hdac_stream(hext_stream)->direction ==
+				SNDRV_PCM_STREAM_CAPTURE)
+				continue;
+
+			stream_tag = hdac_stream(hext_stream)->stream_tag;
+			snd_hdac_ext_link_clear_stream_id(link, stream_tag);
+		}
+	}
+
+	return 0;
+}
 #endif
 
 /* only one flag used so far to harden hw_params/hw_free/trigger/prepare */
@@ -733,3 +772,22 @@ struct snd_soc_dai_driver skl_dai[] = {
 },
 #endif
 };
+
+int hda_dsp_dais_suspend(struct snd_sof_dev *sdev)
+{
+	/*
+	 * In the corner case where a SUSPEND happens during a PAUSE, the ALSA core
+	 * does not throw the TRIGGER_SUSPEND. This leaves the DAIs in an unbalanced state.
+	 * Since the component suspend is called last, we can trap this corner case
+	 * and force the DAIs to release their resources.
+	 */
+#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
+	int ret;
+
+	ret = hda_dai_suspend(sof_to_bus(sdev));
+	if (ret < 0)
+		return ret;
+#endif
+
+	return 0;
+}

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

@@ -894,44 +894,14 @@ int hda_dsp_shutdown(struct snd_sof_dev *sdev)
 
 int hda_dsp_set_hw_params_upon_resume(struct snd_sof_dev *sdev)
 {
-#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
+	int ret;
-	struct hdac_bus *bus = sof_to_bus(sdev);
-	struct snd_soc_pcm_runtime *rtd;
-	struct hdac_ext_stream *hext_stream;
-	struct hdac_ext_link *link;
-	struct hdac_stream *s;
-	const char *name;
-	int stream_tag;
 
-	/* set internal flag for BE */
+	/* make sure all DAI resources are freed */
-	list_for_each_entry(s, &bus->stream_list, list) {
+	ret = hda_dsp_dais_suspend(sdev);
-		hext_stream = stream_to_hdac_ext_stream(s);
+	if (ret < 0)
+		dev_warn(sdev->dev, "%s: failure in hda_dsp_dais_suspend\n", __func__);
 
-		/*
+	return ret;
-		 * clear stream. This should already be taken care for running
-		 * streams when the SUSPEND trigger is called. But paused
-		 * streams do not get suspended, so this needs to be done
-		 * explicitly during suspend.
-		 */
-		if (hext_stream->link_substream) {
-			rtd = asoc_substream_to_rtd(hext_stream->link_substream);
-			name = asoc_rtd_to_codec(rtd, 0)->component->name;
-			link = snd_hdac_ext_bus_get_link(bus, name);
-			if (!link)
-				return -EINVAL;
-
-			hext_stream->link_prepared = 0;
-
-			if (hdac_stream(hext_stream)->direction ==
-				SNDRV_PCM_STREAM_CAPTURE)
-				continue;
-
-			stream_tag = hdac_stream(hext_stream)->stream_tag;
-			snd_hdac_ext_link_clear_stream_id(link, stream_tag);
-		}
-	}
-#endif
-	return 0;
 }
 
 void hda_dsp_d0i3_work(struct work_struct *work)

sound/soc/sof/intel/hda.h

@@ -697,6 +697,7 @@ static inline bool hda_common_check_sdw_irq(struct snd_sof_dev *sdev)
 
 /* common dai driver */
 extern struct snd_soc_dai_driver skl_dai[];
+int hda_dsp_dais_suspend(struct snd_sof_dev *sdev);
 
 /*
  * Platform Specific HW abstraction Ops.