From: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org

[ Upstream commit 76aca10ccb7c23a7b7a0d56e0bfde2c8cdddfe24 ]

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... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- include/sound/soc-dapm.h | 1 + sound/soc/soc-component.c | 1 + sound/soc/soc-dapm.c | 12 ++++++++++++ 3 files changed, 14 insertions(+)

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h index 87f8e1793af15..295d63437e4d8 100644 --- a/include/sound/soc-dapm.h +++ b/include/sound/soc-dapm.h @@ -423,6 +423,7 @@ 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); diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c index 4356cc320fea0..10b5fe5a3af85 100644 --- a/sound/soc/soc-component.c +++ b/sound/soc/soc-component.c @@ -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 diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 3091e8160bad7..5fd32185fe63d 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -2726,6 +2726,18 @@ 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