[PATCH v3 4/9] ASoC: Intel: avs: Handle SUSPEND and RESUME triggers

[Cezary Rojewski]

From: Amadeusz Sławiński <amadeuszx.slawinski at linux.intel.com>

With power management operations added, service SUSPEND and RESUME
trigger commands for running streams.

Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski at linux.intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski at intel.com>
---
 sound/soc/intel/avs/pcm.c | 75 +++++++++++++++++++++++++++++++--------
 1 file changed, 60 insertions(+), 15 deletions(-)

diff --git a/sound/soc/intel/avs/pcm.c b/sound/soc/intel/avs/pcm.c
index df965dbb8d12..db29496e16ab 100644
--- a/sound/soc/intel/avs/pcm.c
+++ b/sound/soc/intel/avs/pcm.c
@@ -208,30 +208,43 @@ static int avs_dai_nonhda_be_prepare(struct snd_pcm_substream *substream, struct
 static int avs_dai_nonhda_be_trigger(struct snd_pcm_substream *substream, int cmd,
 				     struct snd_soc_dai *dai)
 {
+	struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
 	struct avs_dma_data *data;
 	int ret = 0;
 
 	data = snd_soc_dai_get_dma_data(dai, substream);
 
 	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_RESUME:
+		if (rtd->dai_link->ignore_suspend)
+			break;
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		ret = avs_path_pause(data->path);
+		if (ret < 0) {
+			dev_err(dai->dev, "pause BE path failed: %d\n", ret);
+			break;
+		}
+
 		ret = avs_path_run(data->path, AVS_TPLG_TRIGGER_AUTO);
 		if (ret < 0)
 			dev_err(dai->dev, "run BE path failed: %d\n", ret);
 		break;
 
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		if (rtd->dai_link->ignore_suspend)
+			break;
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 	case SNDRV_PCM_TRIGGER_STOP:
 		ret = avs_path_pause(data->path);
 		if (ret < 0)
 			dev_err(dai->dev, "pause BE path failed: %d\n", ret);
 
-		if (cmd == SNDRV_PCM_TRIGGER_STOP) {
-			ret = avs_path_reset(data->path);
-			if (ret < 0)
-				dev_err(dai->dev, "reset BE path failed: %d\n", ret);
-		}
+		ret = avs_path_reset(data->path);
+		if (ret < 0)
+			dev_err(dai->dev, "reset BE path failed: %d\n", ret);
 		break;
 
 	default:
@@ -351,6 +364,7 @@ static int avs_dai_hda_be_prepare(struct snd_pcm_substream *substream, struct sn
 static int avs_dai_hda_be_trigger(struct snd_pcm_substream *substream, int cmd,
 				  struct snd_soc_dai *dai)
 {
+	struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
 	struct hdac_ext_stream *link_stream;
 	struct avs_dma_data *data;
 	int ret = 0;
@@ -361,15 +375,29 @@ static int avs_dai_hda_be_trigger(struct snd_pcm_substream *substream, int cmd,
 	link_stream = substream->runtime->private_data;
 
 	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_RESUME:
+		if (rtd->dai_link->ignore_suspend)
+			break;
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		snd_hdac_ext_stream_start(link_stream);
 
+		ret = avs_path_pause(data->path);
+		if (ret < 0) {
+			dev_err(dai->dev, "pause BE path failed: %d\n", ret);
+			break;
+		}
+
 		ret = avs_path_run(data->path, AVS_TPLG_TRIGGER_AUTO);
 		if (ret < 0)
 			dev_err(dai->dev, "run BE path failed: %d\n", ret);
 		break;
 
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		if (rtd->dai_link->ignore_suspend)
+			break;
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 	case SNDRV_PCM_TRIGGER_STOP:
 		ret = avs_path_pause(data->path);
@@ -378,11 +406,9 @@ static int avs_dai_hda_be_trigger(struct snd_pcm_substream *substream, int cmd,
 
 		snd_hdac_ext_stream_clear(link_stream);
 
-		if (cmd == SNDRV_PCM_TRIGGER_STOP) {
-			ret = avs_path_reset(data->path);
-			if (ret < 0)
-				dev_err(dai->dev, "reset BE path failed: %d\n", ret);
-		}
+		ret = avs_path_reset(data->path);
+		if (ret < 0)
+			dev_err(dai->dev, "reset BE path failed: %d\n", ret);
 		break;
 
 	default:
@@ -587,6 +613,7 @@ static int avs_dai_fe_prepare(struct snd_pcm_substream *substream, struct snd_so
 
 static int avs_dai_fe_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai)
 {
+	struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
 	struct avs_dma_data *data;
 	struct hdac_ext_stream *host_stream;
 	struct hdac_bus *bus;
@@ -598,17 +625,36 @@ static int avs_dai_fe_trigger(struct snd_pcm_substream *substream, int cmd, stru
 	bus = hdac_stream(host_stream)->bus;
 
 	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_RESUME:
+		if (rtd->dai_link->ignore_suspend)
+			break;
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		spin_lock_irqsave(&bus->reg_lock, flags);
 		snd_hdac_stream_start(hdac_stream(host_stream), true);
 		spin_unlock_irqrestore(&bus->reg_lock, flags);
 
+		/* Timeout on DRSM poll shall not stop the resume so ignore the result. */
+		if (cmd == SNDRV_PCM_TRIGGER_RESUME)
+			snd_hdac_stream_wait_drsm(hdac_stream(host_stream));
+
+		ret = avs_path_pause(data->path);
+		if (ret < 0) {
+			dev_err(dai->dev, "pause FE path failed: %d\n", ret);
+			break;
+		}
+
 		ret = avs_path_run(data->path, AVS_TPLG_TRIGGER_AUTO);
 		if (ret < 0)
 			dev_err(dai->dev, "run FE path failed: %d\n", ret);
+
 		break;
 
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		if (rtd->dai_link->ignore_suspend)
+			break;
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 	case SNDRV_PCM_TRIGGER_STOP:
 		ret = avs_path_pause(data->path);
@@ -619,11 +665,9 @@ static int avs_dai_fe_trigger(struct snd_pcm_substream *substream, int cmd, stru
 		snd_hdac_stream_stop(hdac_stream(host_stream));
 		spin_unlock_irqrestore(&bus->reg_lock, flags);
 
-		if (cmd == SNDRV_PCM_TRIGGER_STOP) {
-			ret = avs_path_reset(data->path);
-			if (ret < 0)
-				dev_err(dai->dev, "reset FE path failed: %d\n", ret);
-		}
+		ret = avs_path_reset(data->path);
+		if (ret < 0)
+			dev_err(dai->dev, "reset FE path failed: %d\n", ret);
 		break;
 
 	default:
@@ -974,6 +1018,7 @@ static int avs_component_open(struct snd_soc_component *component,
 			SNDRV_PCM_INFO_MMAP_VALID |
 			SNDRV_PCM_INFO_INTERLEAVED |
 			SNDRV_PCM_INFO_PAUSE |
+			SNDRV_PCM_INFO_RESUME |
 			SNDRV_PCM_INFO_NO_PERIOD_WAKEUP;
 
 	hwparams.formats = SNDRV_PCM_FMTBIT_S16_LE |
-- 
2.25.1