ASoC: Provide per widget type callback when executing DAPM sequences

Many modern devices have features such as DC servos which take time to start.
Currently these are handled by per-widget events but this makes it difficult
to paralleise operations on multiple widgets, meaning delays can end up
being needlessly serialised. By providing a callback to drivers when all
widgets of a given type have been handled during a DAPM sequence the core
allows drivers to start operations separately and wait for them to complete
much more simply.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index a3760c9..6c9ae23 100644 (file)
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -500,6 +500,9 @@ struct snd_soc_dapm_context {
 
        struct snd_soc_dapm_update *update;
 
+       void (*seq_notifier)(struct snd_soc_dapm_context *,
+                            enum snd_soc_dapm_type);
+
        struct device *dev; /* from parent - for debug */
        struct snd_soc_codec *codec; /* parent codec */
        struct snd_soc_card *card; /* parent card */

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 9952254..d244f90 100644 (file)
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -546,6 +546,9 @@ struct snd_soc_codec_driver {
        /* codec bias level */
        int (*set_bias_level)(struct snd_soc_codec *,
                              enum snd_soc_bias_level level);
+
+       void (*seq_notifier)(struct snd_soc_dapm_context *,
+                            enum snd_soc_dapm_type);
 };
 
 /* SoC platform interface */

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 9e68984..b0e7689 100644 (file)
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -3496,6 +3496,7 @@ int snd_soc_register_codec(struct device *dev,
        codec->dapm.bias_level = SND_SOC_BIAS_OFF;
        codec->dapm.dev = dev;
        codec->dapm.codec = codec;
+       codec->dapm.seq_notifier = codec_drv->seq_notifier;
        codec->dev = dev;
        codec->driver = codec_drv;
        codec->num_dai = num_dai;

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index eb7436c..37b376f 100644 (file)
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -878,7 +878,7 @@ static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
        int cur_subseq = -1;
        int cur_reg = SND_SOC_NOPM;
        struct snd_soc_dapm_context *cur_dapm = NULL;
-       int ret;
+       int ret, i;
        int *sort;
 
        if (power_up)
@@ -895,6 +895,13 @@ static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
                        if (!list_empty(&pending))
                                dapm_seq_run_coalesced(cur_dapm, &pending);
 
+                       if (cur_dapm && cur_dapm->seq_notifier) {
+                               for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
+                                       if (sort[i] == cur_sort)
+                                               cur_dapm->seq_notifier(cur_dapm,
+                                                                      i);
+                       }
+
                        INIT_LIST_HEAD(&pending);
                        cur_sort = -1;
                        cur_subseq = -1;
@@ -956,6 +963,13 @@ static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
 
        if (!list_empty(&pending))
                dapm_seq_run_coalesced(dapm, &pending);
+
+       if (cur_dapm && cur_dapm->seq_notifier) {
+               for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
+                       if (sort[i] == cur_sort)
+                               cur_dapm->seq_notifier(cur_dapm,
+                                                      i);
+       }
 }
 
 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)