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ASoC: soc-dapm: Add helper for comparing widget name

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Some drivers use one event callback for multiple widgets but still need
to perform a bit different actions based on actual widget.  This is done
by comparing widget name, however drivers tend to miss possible name
prefix.  Add a helper to solve common mistakes.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231003155710.821315-2-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2023-10-03 17:57:09 +02:00 committed by Mark Brown
parent 1426b9ba7c
commit 76aca10ccb
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GPG Key ID: 24D68B725D5487D0
3 changed files with 14 additions and 0 deletions
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1
include/sound/soc-dapm.h
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@ -469,6 +469,7 @@ void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card);
int snd_soc_dapm_update_dai(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai);
int snd_soc_dapm_widget_name_cmp(struct snd_soc_dapm_widget *widget, const char *s);
/* dapm path setup */
int snd_soc_dapm_new_widgets(struct snd_soc_card *card);

1
sound/soc/soc-component.c
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@ -242,6 +242,7 @@ int snd_soc_component_notify_control(struct snd_soc_component *component,
char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
struct snd_kcontrol *kctl;
/* When updating, change also snd_soc_dapm_widget_name_cmp() */
if (component->name_prefix)
snprintf(name, ARRAY_SIZE(name), "%s %s", component->name_prefix, ctl);
else

12
sound/soc/soc-dapm.c
View File

@ -2728,6 +2728,18 @@ int snd_soc_dapm_update_dai(struct snd_pcm_substream *substream,
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_update_dai);
int snd_soc_dapm_widget_name_cmp(struct snd_soc_dapm_widget *widget, const char *s)
{
struct snd_soc_component *component = snd_soc_dapm_to_component(widget->dapm);
const char *wname = widget->name;
if (component->name_prefix)
wname += strlen(component->name_prefix) + 1; /* plus space */
return strcmp(wname, s);
}
EXPORT_SYMBOL_GPL(snd_soc_dapm_widget_name_cmp);
/*
* dapm_update_widget_flags() - Re-compute widget sink and source flags
* @w: The widget for which to update the flags