mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

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>
This commit is contained in:
Mark Brown 2009-04-20 16:56:59 +01:00
parent 9b5b0c0159
commit cd0f2d4736
1 changed files with 14 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
sound/soc/soc-dapm.c
View File

@ -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;