ASoC: Make aux_dev more like a generic component

aux_dev is mainly used by the machine driver to specify analog devices,
which are registered as codecs. Making it more like a generic component
can help the machine driver to use it to specify any component with
topology info by name.

Details:
- Remove the stub 'rtd_aux' array from the soc card.
- Add a list 'aux_comp_list' to store the components of aux_devs.
  And add a list head 'list_aux' to struct snd_soc_component, for adding
  such components to the above list.
- Add a 'init' ops to a component for machine specific init.
  soc_bind_aux_dev() will set it to be aux_dev's init. And it will be
  called when probing the component.
- soc_bind_aux_dev() will also search components by name of an aux_dev,
  since it may not be a codec.
- Move probing of aux_devs before checking new DAI links brought by
  topology.
- Move removal of aux_devs later than removal of links. Because topology
  of aux components may register DAIs and the DAI drivers will go with
  removal of the aux components, we want soc_remove_link_dais() to remove
  the DAIs at first.

Signed-off-by: Mengdong Lin <mengdong.lin@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 9d1383e8d039..5bc5def6af02 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -787,6 +787,7 @@ struct snd_soc_component {
 	unsigned int registered_as_component:1;
 
 	struct list_head list;
+	struct list_head list_aux; /* for auxiliary component of the card */
 
 	struct snd_soc_dai_driver *dai_drv;
 	int num_dai;
@@ -830,6 +831,9 @@ struct snd_soc_component {
 	int (*probe)(struct snd_soc_component *);
 	void (*remove)(struct snd_soc_component *);
 
+	/* machine specific init */
+	int (*init)(struct snd_soc_component *component);
+
 #ifdef CONFIG_DEBUG_FS
 	void (*init_debugfs)(struct snd_soc_component *component);
 	const char *debugfs_prefix;
@@ -1130,8 +1134,7 @@ struct snd_soc_card {
 	 */
 	struct snd_soc_aux_dev *aux_dev;
 	int num_aux_devs;
-	struct snd_soc_pcm_runtime *rtd_aux;
-	int num_aux_rtd;
+	struct list_head aux_comp_list;
 
 	const struct snd_kcontrol_new *controls;
 	int num_controls;
@@ -1537,6 +1540,7 @@ static inline void snd_soc_initialize_card_lists(struct snd_soc_card *card)
 	INIT_LIST_HEAD(&card->widgets);
 	INIT_LIST_HEAD(&card->paths);
 	INIT_LIST_HEAD(&card->dapm_list);
+	INIT_LIST_HEAD(&card->aux_comp_list);
 }
 
 static inline bool snd_soc_volsw_is_stereo(struct soc_mixer_control *mc)