Patch "ASoC: soc-dapm: Add helper for comparing widget name" has been added to the 6.5-stable tree

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This is a note to let you know that I've just added the patch titled

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

to the 6.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     asoc-soc-dapm-add-helper-for-comparing-widget-name.patch
and it can be found in the queue-6.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit a301b1d65da72d622a01add8b7faea81d6e7d75a
Author: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Date:   Tue Oct 3 17:57:09 2023 +0200

    ASoC: soc-dapm: Add helper for comparing widget name
    
    [ 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@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20231003155710.821315-2-krzysztof.kozlowski@xxxxxxxxxx
    Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

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



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