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authorLars-Peter Clausen <lars@metafoo.de>2014-09-04 19:44:06 +0200
committerMark Brown <broonie@kernel.org>2014-09-04 20:10:25 +0100
commit86dbf2ac6fcb2d2932d4610f2dfe0954aa0633f7 (patch)
treeeca1064e4c727feb98ab402f81f3f8b83e3f0bd1 /sound/soc/soc-dapm.c
parent1c325f771a88579f227fe017e4ee77d852cf5435 (diff)
downloadop-kernel-dev-86dbf2ac6fcb2d2932d4610f2dfe0954aa0633f7.zip
op-kernel-dev-86dbf2ac6fcb2d2932d4610f2dfe0954aa0633f7.tar.gz
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>
Diffstat (limited to 'sound/soc/soc-dapm.c')
-rw-r--r--sound/soc/soc-dapm.c20
1 files changed, 18 insertions, 2 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 8348352..a2025a6 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);
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