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author | Lars-Peter Clausen <lars@metafoo.de> | 2014-09-04 19:44:06 +0200 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2014-09-04 20:10:25 +0100 |
commit | 86dbf2ac6fcb2d2932d4610f2dfe0954aa0633f7 (patch) | |
tree | eca1064e4c727feb98ab402f81f3f8b83e3f0bd1 | |
parent | 1c325f771a88579f227fe017e4ee77d852cf5435 (diff) | |
download | linux-86dbf2ac6fcb2d2932d4610f2dfe0954aa0633f7.tar.gz linux-86dbf2ac6fcb2d2932d4610f2dfe0954aa0633f7.tar.bz2 linux-86dbf2ac6fcb2d2932d4610f2dfe0954aa0633f7.zip |
ASoC: Add support for automatically going to BIAS_OFF on suspend
There is a substantial amount of drivers that in go to SND_SOC_BIAS_OFF on
suspend and go back to SND_SOC_BIAS_SUSPEND on resume (Often this is even
the only thing done in the suspend and resume handlers). This patch
introduces a new suspend_bias_off flag, which when set by a driver will let
the ASoC core automatically put the device's DAPM context at the
SND_SOC_BIAS_OFF level during suspend. Once the device is resumed the DAPM
context will go back to SND_SOC_BIAS_STANDBY (if the context is idle,
otherwise to SND_SOC_BIAS_ON).
This will allow us to remove a fair bit of duplicated code from the drivers.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r-- | include/sound/soc-dapm.h | 3 | ||||
-rw-r--r-- | include/sound/soc.h | 1 | ||||
-rw-r--r-- | sound/soc/soc-core.c | 1 | ||||
-rw-r--r-- | sound/soc/soc-dapm.c | 20 |
4 files changed, 22 insertions, 3 deletions
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h index aac04ff84eea..f955d65c5656 100644 --- a/include/sound/soc-dapm.h +++ b/include/sound/soc-dapm.h @@ -587,7 +587,8 @@ struct snd_soc_dapm_context { enum snd_soc_bias_level suspend_bias_level; struct delayed_work delayed_work; unsigned int idle_bias_off:1; /* Use BIAS_OFF instead of STANDBY */ - + /* Go to BIAS_OFF in suspend if the DAPM context is idle */ + unsigned int suspend_bias_off:1; void (*seq_notifier)(struct snd_soc_dapm_context *, enum snd_soc_dapm_type, int); diff --git a/include/sound/soc.h b/include/sound/soc.h index ce09302bfd6d..ac99fc083eec 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -848,6 +848,7 @@ struct snd_soc_codec_driver { int (*set_bias_level)(struct snd_soc_codec *, enum snd_soc_bias_level level); bool idle_bias_off; + bool suspend_bias_off; void (*seq_notifier)(struct snd_soc_dapm_context *, enum snd_soc_dapm_type, int); diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 068785fa1a06..2bdf9a4ac2b4 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -4402,6 +4402,7 @@ int snd_soc_register_codec(struct device *dev, codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time; codec->dapm.codec = codec; codec->dapm.idle_bias_off = codec_drv->idle_bias_off; + codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off; if (codec_drv->seq_notifier) codec->dapm.seq_notifier = codec_drv->seq_notifier; if (codec_drv->set_bias_level) diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 8348352dc2c6..a2025a6b6a29 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -1683,6 +1683,22 @@ static void dapm_power_one_widget(struct snd_soc_dapm_widget *w, } } +static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm) +{ + if (dapm->idle_bias_off) + return true; + + switch (snd_power_get_state(dapm->card->snd_card)) { + case SNDRV_CTL_POWER_D3hot: + case SNDRV_CTL_POWER_D3cold: + return dapm->suspend_bias_off; + default: + break; + } + + return false; +} + /* * Scan each dapm widget for complete audio path. * A complete path is a route that has valid endpoints i.e.:- @@ -1706,7 +1722,7 @@ static int dapm_power_widgets(struct snd_soc_card *card, int event) trace_snd_soc_dapm_start(card); list_for_each_entry(d, &card->dapm_list, list) { - if (d->idle_bias_off) + if (dapm_idle_bias_off(d)) d->target_bias_level = SND_SOC_BIAS_OFF; else d->target_bias_level = SND_SOC_BIAS_STANDBY; @@ -1772,7 +1788,7 @@ static int dapm_power_widgets(struct snd_soc_card *card, int event) if (d->target_bias_level > bias) bias = d->target_bias_level; list_for_each_entry(d, &card->dapm_list, list) - if (!d->idle_bias_off) + if (!dapm_idle_bias_off(d)) d->target_bias_level = bias; trace_snd_soc_dapm_walk_done(card); |