ASoC: soc-dapm: add snd_soc_dapm_get_bias_level()

Because struct snd_soc_dapm_context is soc-dapm framework specific, user
driver don't need to access its member directly, we would like to hide
them. struct snd_soc_dapm_context will be removed from header in the
future.

Many drivers are directly using dapm->idle_bias, but it should get it
via get_idle_bias() function. Makes it as global function.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/871pomx062.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: morimoto

include/sound/soc-dapm.h

@@ -662,6 +662,8 @@ struct device *snd_soc_dapm_to_dev(struct snd_soc_dapm_context *dapm);
 struct snd_soc_card *snd_soc_dapm_to_card(struct snd_soc_dapm_context *dapm);
 struct snd_soc_component *snd_soc_dapm_to_component(struct snd_soc_dapm_context *dapm);
 
+bool snd_soc_dapm_get_idle_bias(struct snd_soc_dapm_context *dapm);
+
 /* dapm path setup */
 int snd_soc_dapm_new_widgets(struct snd_soc_card *card);
 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm);

sound/soc/soc-dapm.c

@@ -2180,7 +2180,7 @@ static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
 		dapm_seq_insert(w, down_list, false);
 }
 
-static bool dapm_get_idle_bias(struct snd_soc_dapm_context *dapm)
+bool snd_soc_dapm_get_idle_bias(struct snd_soc_dapm_context *dapm)
 {
 	if (dapm->idle_bias) {
 		struct snd_soc_component *component = snd_soc_dapm_to_component(dapm);
@@ -2193,6 +2193,7 @@ static bool dapm_get_idle_bias(struct snd_soc_dapm_context *dapm)
 
 	return dapm->idle_bias;
 }
+EXPORT_SYMBOL_GPL(snd_soc_dapm_get_idle_bias);
 
 /*
  * Scan each dapm widget for complete audio path.
@@ -2219,7 +2220,7 @@ static int dapm_power_widgets(struct snd_soc_card *card, int event,
 	trace_snd_soc_dapm_start(card, event);
 
 	for_each_card_dapms(card, d) {
-		if (dapm_get_idle_bias(d))
+		if (snd_soc_dapm_get_idle_bias(d))
 			d->target_bias_level = SND_SOC_BIAS_STANDBY;
 		else
 			d->target_bias_level = SND_SOC_BIAS_OFF;
@@ -2286,7 +2287,7 @@ static int dapm_power_widgets(struct snd_soc_card *card, int event,
 		if (d->target_bias_level > bias)
 			bias = d->target_bias_level;
 	for_each_card_dapms(card, d)
-		if (dapm_get_idle_bias(d))
+		if (snd_soc_dapm_get_idle_bias(d))
 			d->target_bias_level = bias;
 
 	trace_snd_soc_dapm_walk_done(card);