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authorPiotr Stankiewicz <piotrs@opensource.wolfsonmicro.com>2016-05-13 17:03:55 +0100
committerMark Brown <broonie@kernel.org>2016-05-30 16:15:10 +0100
commit6742064aef7f1fba8e68d30b2e726918a5d66790 (patch)
tree3123c0ad039f1f74bade193c38485ff7afe7eb28 /include
parent1a695a905c18548062509178b98bc91e67510864 (diff)
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')
-rw-r--r--include/sound/soc-dapm.h5
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);