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ASoC: Provide per widget type callback when executing DAPM sequences

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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>
This commit is contained in:
Mark Brown 2011-01-18 16:14:44 +00:00
parent 20e4859ded
commit 474b62d6ee
4 changed files with 22 additions and 1 deletions
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3
include/sound/soc-dapm.h
View file

@ -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 */

3
include/sound/soc.h
View file

@ -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 */

1
sound/soc/soc-core.c
View file

@ -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;

16
sound/soc/soc-dapm.c
View file

@ -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)