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ASoC: Factor out DAPM sequence execution 

Lump the list walk into a single function, and pull in the power
application too so we can do some further refactoring. Pure code
motion.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2009-06-07 10:12:52 +01:00
Родитель 38357ab2c8
Коммит 163cac061c
1 изменённых файлов: 61 добавлений и 61 удалений
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122
sound/soc/soc-dapm.c
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@ -707,55 +707,6 @@ static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
return power;
}
/*
* Scan a single DAPM widget for a complete audio path and update the
* power status appropriately.
*/
static int dapm_power_widget(struct snd_soc_codec *codec, int event,
struct snd_soc_dapm_widget *w)
{
int ret;
switch (w->id) {
case snd_soc_dapm_pre:
if (!w->event)
return 0;
if (event == SND_SOC_DAPM_STREAM_START) {
ret = w->event(w,
NULL, SND_SOC_DAPM_PRE_PMU);
if (ret < 0)
return ret;
} else if (event == SND_SOC_DAPM_STREAM_STOP) {
ret = w->event(w,
NULL, SND_SOC_DAPM_PRE_PMD);
if (ret < 0)
return ret;
}
return 0;
case snd_soc_dapm_post:
if (!w->event)
return 0;
if (event == SND_SOC_DAPM_STREAM_START) {
ret = w->event(w,
NULL, SND_SOC_DAPM_POST_PMU);
if (ret < 0)
return ret;
} else if (event == SND_SOC_DAPM_STREAM_STOP) {
ret = w->event(w,
NULL, SND_SOC_DAPM_POST_PMD);
if (ret < 0)
return ret;
}
return 0;
default:
return dapm_generic_apply_power(w);
}
}
static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
struct snd_soc_dapm_widget *b,
int sort[])
@ -782,6 +733,65 @@ static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
list_add_tail(&new_widget->power_list, list);
}
/* Apply a DAPM power sequence */
static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
int event)
{
struct snd_soc_dapm_widget *w;
int ret;
list_for_each_entry(w, list, power_list) {
switch (w->id) {
case snd_soc_dapm_pre:
if (!w->event)
list_for_each_entry_continue(w, list,
power_list);
if (event == SND_SOC_DAPM_STREAM_START) {
ret = w->event(w,
NULL, SND_SOC_DAPM_PRE_PMU);
if (ret < 0)
pr_err("PRE widget failed: %d\n",
ret);
} else if (event == SND_SOC_DAPM_STREAM_STOP) {
ret = w->event(w,
NULL, SND_SOC_DAPM_PRE_PMD);
if (ret < 0)
pr_err("PRE widget failed: %d\n",
ret);
}
break;
case snd_soc_dapm_post:
if (!w->event)
list_for_each_entry_continue(w, list,
power_list);
if (event == SND_SOC_DAPM_STREAM_START) {
ret = w->event(w,
NULL, SND_SOC_DAPM_POST_PMU);
if (ret < 0)
pr_err("POST widget failed: %d\n",
ret);
} else if (event == SND_SOC_DAPM_STREAM_STOP) {
ret = w->event(w,
NULL, SND_SOC_DAPM_POST_PMD);
if (ret < 0)
pr_err("POST widget failed: %d\n",
ret);
}
break;
default:
ret = dapm_generic_apply_power(w);
if (ret < 0)
pr_err("Failed to apply widget power: %d\n",
ret);
break;
}
}
}
/*
* Scan each dapm widget for complete audio path.
* A complete path is a route that has valid endpoints i.e.:-
@ -847,20 +857,10 @@ static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
}
/* Power down widgets first; try to avoid amplifying pops. */
list_for_each_entry(w, &codec->down_list, power_list) {
ret = dapm_power_widget(codec, event, w);
if (ret != 0)
pr_err("Failed to power down %s: %d\n",
w->name, ret);
}
dapm_seq_run(codec, &codec->down_list, event);
/* Now power up. */
list_for_each_entry(w, &codec->up_list, power_list) {
ret = dapm_power_widget(codec, event, w);
if (ret != 0)
pr_err("Failed to power up %s: %d\n",
w->name, ret);
}
dapm_seq_run(codec, &codec->up_list, event);
/* If we just powered the last thing off drop to standby bias */
if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {