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[23/25] ASoC: meson: implement link-name optional property in meson card utils

Message ID 20240314232201.2102178-24-jan.dakinevich@salutedevices.com (mailing list archive)
State Not Applicable, archived
Headers show
Series Introduce support of audio for Amlogic A1 SoC family | expand

Commit Message

Jan Dakinevich March 14, 2024, 11:21 p.m. UTC 
From: Dmitry Rokosov <ddrokosov@salutedevices.com>

The 'link-name' property presents an optional DT feature that empowers
users to customize the name associated with the DAI link and PCM stream.
This functionality reflects the approach often employed in Qualcomm
audio cards, providing enhanced flexibility in DAI naming conventions
for improved system integration and userspace experience.

It allows userspace program to easy determine PCM stream purpose, e.g.:
    ~ # cat /proc/asound/pcm
    00-00: speaker (*) :  : playback 1
    00-01: mics (*) :  : capture 1
    00-02: loopback (*) :  : capture 1

The previous naming approach using auto-generated fe or be strings
continues to be utilized as a fallback.

Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
---
 sound/soc/meson/meson-card-utils.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)
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Patch

diff --git a/sound/soc/meson/meson-card-utils.c b/sound/soc/meson/meson-card-utils.c
index ed6c7e2f609c..7bae72905a9b 100644
--- a/sound/soc/meson/meson-card-utils.c
+++ b/sound/soc/meson/meson-card-utils.c
@@ -94,10 +94,14 @@  static int meson_card_set_link_name(struct snd_soc_card *card,
 				    struct device_node *node,
 				    const char *prefix)
 {
-	char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
-				    prefix, node->full_name);
-	if (!name)
-		return -ENOMEM;
+	const char *name;
+
+	if (of_property_read_string(node, "link-name", &name)) {
+		name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
+				      prefix, node->full_name);
+		if (!name)
+			return -ENOMEM;
+	}
 
 	link->name = name;
 	link->stream_name = name;