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author | Mengdong Lin <mengdong.lin@linux.intel.com> | 2015-12-31 08:40:43 (GMT) |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2016-01-10 12:06:19 (GMT) |
commit | 68003e6cf2bbd239a322bd8a28dacfaf8174fdee (patch) | |
tree | a4286e7b5d9cbfe6bf68c5173bddbec519412090 | |
parent | 5e4fb372117f476e0c7f85418ed3e39506fbb75c (diff) | |
download | linux-68003e6cf2bbd239a322bd8a28dacfaf8174fdee.tar.xz |
ASoC: Support registering a DAI dynamically
Define API snd_soc_register_dai() to add a DAI dynamically and
create the DAI widgets. Topology can use this API to register DAIs
when probing a component with topology info. These DAIs's playback
& capture widgets will be freed when the sound card is unregistered
and the DAIs will be freed when cleaning up the component.
And a dobj is embedded into the struct snd_soc_dai_driver. Topology
can use the dobj to find the DAI drivers created by it and free them
when the topology component is removed.
Signed-off-by: Mengdong Lin <mengdong.lin@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r-- | include/sound/soc-dai.h | 1 | ||||
-rw-r--r-- | include/sound/soc.h | 3 | ||||
-rw-r--r-- | sound/soc/soc-core.c | 42 |
3 files changed, 46 insertions, 0 deletions
diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h index 212eaaf..964b7de 100644 --- a/include/sound/soc-dai.h +++ b/include/sound/soc-dai.h @@ -222,6 +222,7 @@ struct snd_soc_dai_driver { const char *name; unsigned int id; unsigned int base; + struct snd_soc_dobj dobj; /* DAI driver callbacks */ int (*probe)(struct snd_soc_dai *dai); diff --git a/include/sound/soc.h b/include/sound/soc.h index af347bc..9d1383e 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1663,6 +1663,9 @@ int snd_soc_add_dai_link(struct snd_soc_card *card, void snd_soc_remove_dai_link(struct snd_soc_card *card, struct snd_soc_dai_link *dai_link); +int snd_soc_register_dai(struct snd_soc_component *component, + struct snd_soc_dai_driver *dai_drv); + #include <sound/soc-dai.h> #ifdef CONFIG_DEBUG_FS diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 1bd0b37..c572673 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -2834,6 +2834,48 @@ err: return ret; } +/** + * snd_soc_register_dai - Register a DAI dynamically & create its widgets + * + * @component: The component the DAIs are registered for + * @dai_drv: DAI driver to use for the DAI + * + * Topology can use this API to register DAIs when probing a component. + * These DAIs's widgets will be freed in the card cleanup and the DAIs + * will be freed in the component cleanup. + */ +int snd_soc_register_dai(struct snd_soc_component *component, + struct snd_soc_dai_driver *dai_drv) +{ + struct snd_soc_dapm_context *dapm = + snd_soc_component_get_dapm(component); + struct snd_soc_dai *dai; + int ret; + + if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) { + dev_err(component->dev, "Invalid dai type %d\n", + dai_drv->dobj.type); + return -EINVAL; + } + + lockdep_assert_held(&client_mutex); + dai = soc_add_dai(component, dai_drv, false); + if (!dai) + return -ENOMEM; + + /* Create the DAI widgets here. After adding DAIs, topology may + * also add routes that need these widgets as source or sink. + */ + ret = snd_soc_dapm_new_dai_widgets(dapm, dai); + if (ret != 0) { + dev_err(component->dev, + "Failed to create DAI widgets %d\n", ret); + } + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_register_dai); + static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm, enum snd_soc_dapm_type type, int subseq) { |