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ASoC: dapm: Add a update parameter to snd_soc_dapm_{mux,mixer}_update_power 

In order to avoid race conditions the assignment of dapm->update should happen
while card->dapm_mutex is being held. To allow CODEC drivers to run a register
update when using snd_soc_dapm_mux_update_power() or
snd_soc_dapm_mixer_update_power() add a update parameter to these two functions.
The update parameter will be assigned to dapm->update while card->dapm_mutex is
locked.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Lars-Peter Clausen 2013-07-24 15:27:38 +02:00 committed by Mark Brown
parent ce6cfaf1de
commit 6b3fc03b3b
2 changed files with 13 additions and 4 deletions
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7
include/sound/soc-dapm.h
View File

@ -333,6 +333,7 @@ struct snd_soc_dapm_route;
struct snd_soc_dapm_context;
struct regulator;
struct snd_soc_dapm_widget_list;
struct snd_soc_dapm_update;
int dapm_reg_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event);
@ -392,9 +393,11 @@ void snd_soc_dapm_shutdown(struct snd_soc_card *card);
/* external DAPM widget events */
int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
struct snd_kcontrol *kcontrol, int connect);
struct snd_kcontrol *kcontrol, int connect,
struct snd_soc_dapm_update *update);
int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e);
struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
struct snd_soc_dapm_update *update);
/* dapm sys fs - used by the core */
int snd_soc_dapm_sys_add(struct device *dev);

10
sound/soc/soc-dapm.c
View File

@ -1982,13 +1982,16 @@ static int soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
}
int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
struct snd_soc_dapm_update *update)
{
struct snd_soc_card *card = dapm->card;
int ret;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
dapm->update = update;
ret = soc_dapm_mux_update_power(dapm, kcontrol, mux, e);
dapm->update = NULL;
mutex_unlock(&card->dapm_mutex);
if (ret > 0)
soc_dpcm_runtime_update(card);
@ -2022,13 +2025,16 @@ static int soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
}
int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
struct snd_kcontrol *kcontrol, int connect)
struct snd_kcontrol *kcontrol, int connect,
struct snd_soc_dapm_update *update)
{
struct snd_soc_card *card = dapm->card;
int ret;
mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
dapm->update = update;
ret = soc_dapm_mixer_update_power(dapm, kcontrol, connect);
dapm->update = NULL;
mutex_unlock(&card->dapm_mutex);
if (ret > 0)
soc_dpcm_runtime_update(card);