[alsa-devel] [PATCH 2/2] ASoC: dapm: Reorder the bias update sequence

[Xiang Xiao]

The new sequence ensure that dapm_pre_sequence_async work on
the card before all codecs and dapm_post_sequence_async work
on the card after all codecs.
So the machine driver could utilize the determinate sequence
to do the gloabl setup and teardown in the right place.

Signed-off-by: Xiang Xiao <xiaoxiang at xiaomi.com>
---
 sound/soc/soc-dapm.c | 37 ++++++++++++++++++++++++++-----------
 1 file changed, 26 insertions(+), 11 deletions(-)

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 00ed0e9..0d8ba30 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -1825,10 +1825,14 @@ static int dapm_power_widgets(struct snd_soc_card *card, int event)
 
 	trace_snd_soc_dapm_walk_done(card);
 
-	/* Run all the bias changes in parallel */
-	list_for_each_entry(d, &card->dapm_list, list)
-		async_schedule_domain(dapm_pre_sequence_async, d,
-					&async_domain);
+	/* Run card bias changes at first */
+	dapm_pre_sequence_async(&card->dapm, 0);
+	/* Run other bias changes in parallel */
+	list_for_each_entry(d, &card->dapm_list, list) {
+		if (d != &card->dapm)
+			async_schedule_domain(dapm_pre_sequence_async, d,
+						&async_domain);
+	}
 	async_synchronize_full_domain(&async_domain);
 
 	list_for_each_entry(w, &down_list, power_list) {
@@ -1848,10 +1852,14 @@ static int dapm_power_widgets(struct snd_soc_card *card, int event)
 	dapm_seq_run(card, &up_list, event, true);
 
 	/* Run all the bias changes in parallel */
-	list_for_each_entry(d, &card->dapm_list, list)
-		async_schedule_domain(dapm_post_sequence_async, d,
-					&async_domain);
+	list_for_each_entry(d, &card->dapm_list, list) {
+		if (d != &card->dapm)
+			async_schedule_domain(dapm_post_sequence_async, d,
+						&async_domain);
+	}
 	async_synchronize_full_domain(&async_domain);
+	/* Run card bias changes at last */
+	dapm_post_sequence_async(&card->dapm, 0);
 
 	/* do we need to notify any clients that DAPM event is complete */
 	list_for_each_entry(d, &card->dapm_list, list) {
@@ -3942,11 +3950,18 @@ void snd_soc_dapm_shutdown(struct snd_soc_card *card)
 	struct snd_soc_dapm_context *dapm;
 
 	list_for_each_entry(dapm, &card->dapm_list, list) {
-		soc_dapm_shutdown_dapm(dapm);
-		if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
-			snd_soc_dapm_set_bias_level(dapm,
-						    SND_SOC_BIAS_OFF);
+		if (dapm != &card->dapm) {
+			soc_dapm_shutdown_dapm(dapm);
+			if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
+				snd_soc_dapm_set_bias_level(dapm,
+							    SND_SOC_BIAS_OFF);
+		}
 	}
+
+	soc_dapm_shutdown_dapm(&card->dapm);
+	if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
+		snd_soc_dapm_set_bias_level(&card->dapm,
+					    SND_SOC_BIAS_OFF);
 }
 
 /* Module information */
-- 
1.8.1.2