ASoC: soc-pcm: add a flag to reverse the stop sequence

On stream stop, currently CPU DAI stop sequence invoked first
followed by DMA. For Few platforms, it is required to stop the
DMA first before stopping CPU DAI.

Introduced new flag in dai_link structure for reordering stop sequence.
Based on flag check, ASoC core will re-order the stop sequence.

Fixes: 4378f1fbe92405 ("ASoC: soc-pcm: Use different sequence for start/stop trigger")
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20210716123015.15697-1-vijendar.mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 675849d..8e6dd8a 100644 (file)
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -712,6 +712,12 @@ struct snd_soc_dai_link {
        /* Do not create a PCM for this DAI link (Backend link) */
        unsigned int ignore:1;
 
+       /* This flag will reorder stop sequence. By enabling this flag
+        * DMA controller stop sequence will be invoked first followed by
+        * CPU DAI driver stop sequence
+        */
+       unsigned int stop_dma_first:1;
+
 #ifdef CONFIG_SND_SOC_TOPOLOGY
        struct snd_soc_dobj dobj; /* For topology */
 #endif

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 46513bb..d1c570c 100644 (file)
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1015,6 +1015,7 @@ out:
 
 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 {
+       struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
        int ret = -EINVAL, _ret = 0;
        int rollback = 0;
 
@@ -1055,14 +1056,23 @@ start_err:
        case SNDRV_PCM_TRIGGER_STOP:
        case SNDRV_PCM_TRIGGER_SUSPEND:
        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-               ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
-               if (ret < 0)
-                       break;
+               if (rtd->dai_link->stop_dma_first) {
+                       ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
+                       if (ret < 0)
+                               break;
 
-               ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
-               if (ret < 0)
-                       break;
+                       ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
+                       if (ret < 0)
+                               break;
+               } else {
+                       ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
+                       if (ret < 0)
+                               break;
 
+                       ret = snd_soc_pcm_component_trigger(substream, cmd, rollback);
+                       if (ret < 0)
+                               break;
+               }
                ret = snd_soc_link_trigger(substream, cmd, rollback);
                break;
        }