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ASoC: Don't mark the outputs of supplies as dirty on state changes

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The whole point of supply widgets is that they aren't inputs to their
sinks so a state change in a supply should never affect the state of the
widget being supplied and we don't need to mark them as dirty.

           Power    Path   Neighbour
Before:    69       727    905
After:     63       607    731

This is particularly useful where supplies affect large portions of the
chip (eg, a bandgap supplying the analogue sections).

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown
2011-10-04 22:43:31 +01:00
parent 9b8a83b205
commit f3bf3e456a
1 changed files with 11 additions and 4 deletions
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15
sound/soc/soc-dapm.c
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@@ -1260,11 +1260,18 @@ static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
path->connect);
}
}
list_for_each_entry(path, &w->sinks, list_source) {
if (path->sink) {
dapm_widget_set_peer_power(path->sink, power,
path->connect);
switch (w->id) {
case snd_soc_dapm_supply:
/* Supplies can't affect their outputs, only their inputs */
break;
default:
list_for_each_entry(path, &w->sinks, list_source) {
if (path->sink) {
dapm_widget_set_peer_power(path->sink, power,
path->connect);
}
}
break;
}
if (power)