[PATCH 2/3] ASoC: SOF: pcm: Restrict DSP D0i3 during S0ix to IPC3

[Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>]

From: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

Introduce a new field in struct sof_ipc_pcm_ops that can be used to
restrict DSP D0i3 during S0ix suspend to IPC3. With IPC4, all streams
must be stopped before S0ix suspend.

Reviewed-by: Uday M Bhat <uday.m.bhat@intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
 sound/soc/sof/ipc3-pcm.c  |  1 +
 sound/soc/sof/pcm.c       | 13 ++++++-------
 sound/soc/sof/sof-audio.h |  2 ++
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/sound/soc/sof/ipc3-pcm.c b/sound/soc/sof/ipc3-pcm.c
index 35769dd7905e..af0bf354cb20 100644
--- a/sound/soc/sof/ipc3-pcm.c
+++ b/sound/soc/sof/ipc3-pcm.c
@@ -434,4 +434,5 @@ const struct sof_ipc_pcm_ops ipc3_pcm_ops = {
 	.trigger = sof_ipc3_pcm_trigger,
 	.dai_link_fixup = sof_ipc3_pcm_dai_link_fixup,
 	.reset_hw_params_during_stop = true,
+	.d0i3_supported_in_s0ix = true,
 };
diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c
index 4e11df6b4823..8fca4b0d63de 100644
--- a/sound/soc/sof/pcm.c
+++ b/sound/soc/sof/pcm.c
@@ -312,14 +312,13 @@ static int sof_pcm_trigger(struct snd_soc_component *component,
 			ipc_first = true;
 		break;
 	case SNDRV_PCM_TRIGGER_SUSPEND:
-		if (sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
+		/*
+		 * If DSP D0I3 is allowed during S0iX, set the suspend_ignored flag for
+		 * D0I3-compatible streams to keep the firmware pipeline running
+		 */
+		if (pcm_ops && pcm_ops->d0i3_supported_in_s0ix &&
+		    sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
 		    spcm->stream[substream->stream].d0i3_compatible) {
-			/*
-			 * trap the event, not sending trigger stop to
-			 * prevent the FW pipelines from being stopped,
-			 * and mark the flag to ignore the upcoming DAPM
-			 * PM events.
-			 */
 			spcm->stream[substream->stream].suspend_ignored = true;
 			return 0;
 		}
diff --git a/sound/soc/sof/sof-audio.h b/sound/soc/sof/sof-audio.h
index f4134257789e..2aeb269af752 100644
--- a/sound/soc/sof/sof-audio.h
+++ b/sound/soc/sof/sof-audio.h
@@ -117,6 +117,7 @@ struct snd_sof_dai_config_data {
  *				  triggers. The FW keeps the host DMA running in this case and
  *				  therefore the host must do the same and should stop the DMA during
  *				  hw_free.
+ * @d0i3_supported_in_s0ix: Allow DSP D0I3 during S0iX
  */
 struct sof_ipc_pcm_ops {
 	int (*hw_params)(struct snd_soc_component *component, struct snd_pcm_substream *substream,
@@ -136,6 +137,7 @@ struct sof_ipc_pcm_ops {
 	bool reset_hw_params_during_stop;
 	bool ipc_first_on_start;
 	bool platform_stop_during_hw_free;
+	bool d0i3_supported_in_s0ix;
 };
 
 /**
-- 
2.40.1