diff options
| author | Keyon Jie <yang.jie@linux.intel.com> | 2019-10-25 17:41:18 -0500 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-10-28 14:45:53 +0000 |
| commit | ac8c046f19f94ec419c60d7a073af75a71386e97 (patch) | |
| tree | bbe84047d476f70b9f808cf583e6fefebb226fd9 /sound/soc/sof/topology.c | |
| parent | 0b50b3b1c3bc2a2c9eeab418b3de3e60e0530cf4 (diff) | |
| download | lwn-ac8c046f19f94ec419c60d7a073af75a71386e97.tar.gz lwn-ac8c046f19f94ec419c60d7a073af75a71386e97.zip | |
ASoC: SOF: ignore suspend/resume for D0ix compatible streams
During system suspend, the PM framework will freeze all applications and
the ALSA/ASoC core will suspend all RUNNING PCM streams.
However, D0ix-compatible PCM streams should keep the related pipelines
active in the DSP when the system is entering S0ix. The TRIGGER_SUSPEND
event is trapped in such cases to prevent the pipelines from being
stopped. Likewise, the TRIGGER_RESUME/START events should not affect the
pipeline state.
The SOF driver also triggers some DSP Firmware pipelines based on the
DAPM widgets power events. In such cases, we also ignore PRE_PMU and
POST_PMD events to keep the pipelines active.
Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191025224122.7718-23-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/sof/topology.c')
| -rw-r--r-- | sound/soc/sof/topology.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c index cc138ac6a8eb..e0e2ae734632 100644 --- a/sound/soc/sof/topology.c +++ b/sound/soc/sof/topology.c @@ -135,7 +135,9 @@ static int sof_keyword_dapm_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *k, int event) { struct snd_sof_widget *swidget = w->dobj.private; + int stream = SNDRV_PCM_STREAM_CAPTURE; struct snd_sof_dev *sdev; + struct snd_sof_pcm *spcm; int ret = 0; if (!swidget) @@ -146,11 +148,19 @@ static int sof_keyword_dapm_event(struct snd_soc_dapm_widget *w, dev_dbg(sdev->dev, "received event %d for widget %s\n", event, w->name); + /* get runtime PCM params using widget's stream name */ + spcm = snd_sof_find_spcm_name(sdev, swidget->widget->sname); + /* process events */ switch (event) { case SND_SOC_DAPM_PRE_PMU: + if (spcm->stream[stream].suspend_ignored) { + dev_dbg(sdev->dev, "PRE_PMU event ignored, KWD pipeline is already RUNNING\n"); + return 0; + } + /* set pcm params */ - ret = ipc_pcm_params(swidget, SOF_IPC_STREAM_CAPTURE); + ret = ipc_pcm_params(swidget, stream); if (ret < 0) { dev_err(sdev->dev, "error: failed to set pcm params for widget %s\n", @@ -166,6 +176,11 @@ static int sof_keyword_dapm_event(struct snd_soc_dapm_widget *w, swidget->widget->name); break; case SND_SOC_DAPM_POST_PMD: + if (spcm->stream[stream].suspend_ignored) { + dev_dbg(sdev->dev, "POST_PMD even ignored, KWD pipeline will remain RUNNING\n"); + return 0; + } + /* stop trigger */ ret = ipc_trigger(swidget, SOF_IPC_STREAM_TRIG_STOP); if (ret < 0) |