path: root/include/sound
diff options
authorMark Brown <broonie@opensource.wolfsonmicro.com>2010-12-14 16:13:57 +0000
committerMark Brown <broonie@opensource.wolfsonmicro.com>2010-12-17 11:18:04 +0000
commit97404f2e0386ac147cec00fc5d89ea475b04bd78 (patch)
treec84f883afed54cb7d20e74818302a6f960c59317 /include/sound
parentASoC: Extend DAPM to handle power changes on cross-device paths (diff)
ASoC: Do DAPM control updates in the middle of DAPM sequences
Attempt to minimise audible effects from mixer and mux updates by implementing the actual register changes between powering down widgets that have become unused and powering up widgets that are newly used. This means that we're making the change with the minimum set of widgets powered, that the input path is connected when we're powering up widgets (so things like DC offset correction can run with their signal active) and that we bring things down to cold before switching away. Since hardware tends to be designed for the power on/off case more than for dynamic reconfiguration this should minimise pops and clicks during reconfiguration while active. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Peter Ujfalusi <peter.ujfalusi@nokia.com> Tested-by: Peter Ujfalusi <peter.ujfalusi@nokia.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'include/sound')
1 files changed, 10 insertions, 0 deletions
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 98783510d2f1..540872fc1390 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -460,6 +460,14 @@ struct snd_soc_dapm_widget {
struct list_head power_list;
+struct snd_soc_dapm_update {
+ struct snd_soc_dapm_widget *widget;
+ struct snd_kcontrol *kcontrol;
+ int reg;
+ int mask;
+ int val;
/* DAPM context */
struct snd_soc_dapm_context {
int n_widgets; /* number of widgets in this context */
@@ -468,6 +476,8 @@ struct snd_soc_dapm_context {
struct delayed_work delayed_work;
unsigned int idle_bias_off:1; /* Use BIAS_OFF instead of STANDBY */
+ struct snd_soc_dapm_update *update;
struct device *dev; /* from parent - for debug */
struct snd_soc_codec *codec; /* parent codec */
struct snd_soc_card *card; /* parent card */