AcoSail/kernel_optimize_test
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ASoC: Intel: Skylake: Add support for active suspend

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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>
This commit is contained in:
Jeeja KP 2015-12-03 23:30:00 +05:30 committed by Mark Brown
parent 820f339fe9
commit 4557c305d4
3 changed files with 55 additions and 2 deletions
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27
sound/soc/intel/skylake/skl-pcm.c
View File

@ -109,6 +109,31 @@ static enum hdac_ext_stream_type skl_get_host_stream_type(struct hdac_ext_bus *e
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 @@ static int skl_pcm_open(struct snd_pcm_substream *substream,
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 @@ static void skl_pcm_close(struct snd_pcm_substream *substream,
* dma_params
*/
snd_soc_dai_set_dma_data(dai, substream, NULL);
skl_set_suspend_active(substream, dai, false);
kfree(dma_params);
}

28
sound/soc/intel/skylake/skl.c
View File

@ -169,16 +169,40 @@ static int skl_suspend(struct device *dev)
{
struct pci_dev *pci = to_pci_dev(dev);
struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
struct skl *skl = ebus_to_skl(ebus);
return _skl_suspend(ebus);
/*
* Do not suspend if streams which are marked ignore suspend are
* running, we need to save the state for these and continue
*/
if (skl->supend_active) {
pci_save_state(pci);
pci_disable_device(pci);
return 0;
} else {
return _skl_suspend(ebus);
}
}
static int skl_resume(struct device *dev)
{
struct pci_dev *pci = to_pci_dev(dev);
struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
struct skl *skl = ebus_to_skl(ebus);
int ret;
return _skl_resume(ebus);
/*
* resume only when we are not in suspend active, otherwise need to
* restore the device
*/
if (skl->supend_active) {
pci_restore_state(pci);
ret = pci_enable_device(pci);
} else {
ret = _skl_resume(ebus);
}
return ret;
}
#endif /* CONFIG_PM_SLEEP */

2
sound/soc/intel/skylake/skl.h
View File

@ -70,6 +70,8 @@ struct skl {
struct list_head ppl_list;
const char *fw_name;
int supend_active;
};
#define skl_to_ebus(s) (&(s)->ebus)