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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 /sound/soc/soc-pcm.c | |
| parent | Linux 4.7-rc1 (diff) | |
| download | wireguard-linux-6742064aef7f1fba8e68d30b2e726918a5d66790.tar.xz wireguard-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 'sound/soc/soc-pcm.c')
| -rw-r--r-- | sound/soc/soc-pcm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index aa99dac31b3b..c2b0aa82f3f1 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1294,7 +1294,8 @@ int dpcm_path_get(struct snd_soc_pcm_runtime *fe, int paths; /* get number of valid DAI paths and their widgets */ - paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list); + paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list, + NULL); dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, stream ? "capture" : "playback"); |