ASoC: simple-card-utils: add asoc_graph_is_ports0()

audio-graph-card2 will support DPCM/Multi/Codec2Codec,
and these will use almost same DT settings which uses
ports0 and ports1.
This patch adds asoc_graph_is_ports0() which checks
port is under port0 or not.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/875yu2n8ra.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index 6b78034..03d0754 100644 (file)
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -180,6 +180,7 @@ int asoc_simple_init_priv(struct asoc_simple_priv *priv,
 int asoc_simple_remove(struct platform_device *pdev);
 
 int asoc_graph_card_probe(struct snd_soc_card *card);
+int asoc_graph_is_ports0(struct device_node *port);
 
 #ifdef DEBUG
 static inline void asoc_simple_debug_dai(struct asoc_simple_priv *priv,

diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 10c63b7..fd893d2 100644 (file)
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -759,6 +759,34 @@ int asoc_graph_card_probe(struct snd_soc_card *card)
 }
 EXPORT_SYMBOL_GPL(asoc_graph_card_probe);
 
+int asoc_graph_is_ports0(struct device_node *np)
+{
+       struct device_node *port, *ports, *ports0, *top;
+       int ret;
+
+       /* np is "endpoint" or "port" */
+       if (of_node_name_eq(np, "endpoint")) {
+               port = of_get_parent(np);
+       } else {
+               port = np;
+               of_node_get(port);
+       }
+
+       ports   = of_get_parent(port);
+       top     = of_get_parent(ports);
+       ports0  = of_get_child_by_name(top, "ports");
+
+       ret = ports0 == ports;
+
+       of_node_put(port);
+       of_node_put(ports);
+       of_node_put(ports0);
+       of_node_put(top);
+
+       return ret;
+}
+EXPORT_SYMBOL_GPL(asoc_graph_is_ports0);
+
 /* Module information */
 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");