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authorRichard Fitzgerald <rf@opensource.wolfsonmicro.com>2016-11-29 15:44:38 +0000
committerMark Brown <broonie@kernel.org>2016-11-30 17:16:09 +0000
commit1b4d9c22191583ef1fb7433417b2ceb2a608d887 (patch)
tree2f3a9d88142e5bc4771062e8b8be072c2e45c6c7 /include/sound
parent1001354ca34179f3db924eb66672442a173147dc (diff)
ASoC: core: Add component pin control functions
It's often the case that a codec driver will need to control its own pins. However, if a name_prefix has been applied to this codec it must be included in the name passed to any of the snd_soc_dapm_x_pin() functions. The behaviour of the existing pin control functions is reasonable, since you may want to search for a fully-specified name within the scope of an entire card. This means that we can't apply the prefix in these functions because it will break card-scope searches. Constructing a prefixed string "manually" in codec drivers leads to a lot of repetition of the same code. To make this tidier in codec drivers this patch adds a new set of equivalent functions that take a struct snd_soc_component instead of a dapm context and automatically add the component's name_prefix to the given name. This makes it a simple change in codec drivers to be prefix-safe. The new functions are not quite trivial enough to be inlines and the compiler won't be able to compile-away any part of them. Although it looks somewhat inefficient to have to allocate a temporary buffer and combine strings, the current design of the widget list doesn't lend itself to a more optimized implementation - it's a single list of all widgets on a card and is searched linearly for a matching string. As pin state changes are generally low-frequency events it's unlikely to be a significant issue - at least not enough to rewrite the widget list handling just for this. Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/soc.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 4f1c784e44f6..a26c651cb1ee 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1697,4 +1697,24 @@ static inline void snd_soc_dapm_mutex_unlock(struct snd_soc_dapm_context *dapm)
mutex_unlock(&dapm->card->dapm_mutex);
}
+int snd_soc_component_enable_pin(struct snd_soc_component *component,
+ const char *pin);
+int snd_soc_component_enable_pin_unlocked(struct snd_soc_component *component,
+ const char *pin);
+int snd_soc_component_disable_pin(struct snd_soc_component *component,
+ const char *pin);
+int snd_soc_component_disable_pin_unlocked(struct snd_soc_component *component,
+ const char *pin);
+int snd_soc_component_nc_pin(struct snd_soc_component *component,
+ const char *pin);
+int snd_soc_component_nc_pin_unlocked(struct snd_soc_component *component,
+ const char *pin);
+int snd_soc_component_get_pin_status(struct snd_soc_component *component,
+ const char *pin);
+int snd_soc_component_force_enable_pin(struct snd_soc_component *component,
+ const char *pin);
+int snd_soc_component_force_enable_pin_unlocked(
+ struct snd_soc_component *component,
+ const char *pin);
+
#endif