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| author | Piotr Stankiewicz <piotrs@opensource.wolfsonmicro.com> | 2016-05-13 17:03:55 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-05-30 16:15:10 +0100 |
| commit | 6742064aef7f1fba8e68d30b2e726918a5d66790 (patch) | |
| tree | 3123c0ad039f1f74bade193c38485ff7afe7eb28 /include/sound/soc-dapm.h | |
| parent | 1a695a905c18548062509178b98bc91e67510864 (diff) | |
| download | linux-6742064aef7f1fba8e68d30b2e726918a5d66790.tar.gz linux-6742064aef7f1fba8e68d30b2e726918a5d66790.tar.bz2 linux-6742064aef7f1fba8e68d30b2e726918a5d66790.zip | |
ASoC: dapm: support user-defined stop condition in dai_get_connected_widgets
Certain situations may warrant examining DAPM paths only to a certain
arbitrary point, as opposed to always following them to the end. For
instance, when establishing a connection between a front-end DAI link
and a back-end DAI link in a DPCM path, it does not make sense to walk
the DAPM graph beyond the first widget associated with a back-end link.
This patch introduces a mechanism which lets a user of
dai_get_connected_widgets supply a function which will be called for
every node during the graph walk. When invoked, this function can
execute arbitrary logic to decide whether the walk, given a DAPM widget
and walk direction, should be terminated at that point or continued
as normal.
Signed-off-by: Piotr Stankiewicz <piotrs@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound/soc-dapm.h')
| -rw-r--r-- | include/sound/soc-dapm.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h index 3101d53468aa..ca77db443499 100644 --- a/include/sound/soc-dapm.h +++ b/include/sound/soc-dapm.h @@ -358,6 +358,7 @@ struct snd_soc_dapm_context; struct regulator; struct snd_soc_dapm_widget_list; struct snd_soc_dapm_update; +enum snd_soc_dapm_direction; int dapm_regulator_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event); @@ -451,7 +452,9 @@ void dapm_mark_endpoints_dirty(struct snd_soc_card *card); /* dapm path query */ int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream, - struct snd_soc_dapm_widget_list **list); + struct snd_soc_dapm_widget_list **list, + bool (*custom_stop_condition)(struct snd_soc_dapm_widget *, + enum snd_soc_dapm_direction)); struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm( struct snd_kcontrol *kcontrol); |