ASoC: Intel: Skylake: Add support for active suspend
Some of the usecases can be marked as 'ignore_suspend' by
machine. For these on suspend we should keep audio controller
ON by saving the state and not suspending the device
For this we need to maintain a counter for these streams and be
active on suspend when such a stream is opened.
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/intel/skylake/skl-pcm.c b/sound/soc/intel/skylake/skl-pcm.c
index 6570e57..b89ae6f 100644
--- a/sound/soc/intel/skylake/skl-pcm.c
+++ b/sound/soc/intel/skylake/skl-pcm.c
@@ -109,6 +109,31 @@
return HDAC_EXT_STREAM_TYPE_COUPLED;
}
+/*
+ * check if the stream opened is marked as ignore_suspend by machine, if so
+ * then enable suspend_active refcount
+ *
+ * The count supend_active does not need lock as it is used in open/close
+ * and suspend context
+ */
+static void skl_set_suspend_active(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai, bool enable)
+{
+ struct hdac_ext_bus *ebus = dev_get_drvdata(dai->dev);
+ struct snd_soc_dapm_widget *w;
+ struct skl *skl = ebus_to_skl(ebus);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ w = dai->playback_widget;
+ else
+ w = dai->capture_widget;
+
+ if (w->ignore_suspend && enable)
+ skl->supend_active++;
+ else if (w->ignore_suspend && !enable)
+ skl->supend_active--;
+}
+
static int skl_pcm_open(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
@@ -146,6 +171,7 @@
dev_dbg(dai->dev, "stream tag set in dma params=%d\n",
dma_params->stream_tag);
+ skl_set_suspend_active(substream, dai, true);
snd_pcm_set_sync(substream);
return 0;
@@ -257,6 +283,7 @@
* dma_params
*/
snd_soc_dai_set_dma_data(dai, substream, NULL);
+ skl_set_suspend_active(substream, dai, false);
kfree(dma_params);
}