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authorMark Brown <broonie@opensource.wolfsonmicro.com>2009-04-20 16:56:59 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-04-20 18:09:33 +0100
commitcd0f2d4736ae8efabc60e54ecc8f677d0eddce02 (patch)
tree4f285d995cbb8422edb4b436f3732acfbec49ce7
parent9b5b0c01598f9782690b09ce6c49f4ba116dde44 (diff)
ASoC: Factor out generic widget power checks
This will form a basis for further power check refactoring: the overall goal of these changes is to allow us to check power separately to applying it, allowing improvements in the power sequencing algorithms. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
-rw-r--r--sound/soc/soc-dapm.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index a6d73379ab3..28e6e324ccf 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -581,6 +581,19 @@ static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
return 0;
}
+/* Generic check to see if a widget should be powered.
+ */
+static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
+{
+ int in, out;
+
+ in = is_connected_input_ep(w);
+ dapm_clear_walk(w->codec);
+ out = is_connected_output_ep(w);
+ dapm_clear_walk(w->codec);
+ return out != 0 && in != 0;
+}
+
/*
* Scan a single DAPM widget for a complete audio path and update the
* power status appropriately.
@@ -653,11 +666,7 @@ static int dapm_power_widget(struct snd_soc_codec *codec, int event,
}
/* all other widgets */
- in = is_connected_input_ep(w);
- dapm_clear_walk(w->codec);
- out = is_connected_output_ep(w);
- dapm_clear_walk(w->codec);
- power = (out != 0 && in != 0) ? 1 : 0;
+ power = dapm_generic_check_power(w);
power_change = (w->power == power) ? 0 : 1;
w->power = power;