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Commit a180e8b9 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Mark Brown
Browse files

ASoC: add snd_soc_get_dai_id() function 



ALSA SoC needs to know connected DAI ID for detecting.
It is not a big problem if device/driver was only for sound,
but getting DAI ID will be difficult if device includes both
Video/Sound, like HDMI.
To solve this issue, this patch adds new snd_soc_get_dai_id() and
its related .of_xlate_dai_id callback on component driver.
In below case, we can handle Sound port (= port@2) as ID = 0
if .of_xlate_dai_id has its support.

	hdmi {
		port@0 { /* VIDEO */ };
		port@1 { /* VIDEO */ };
		port@2 { /* SOUND */ };
	};

Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 2ea659a9

include/sound/soc.h

+3 −0
Original line number Diff line number Diff line
@@ -803,6 +803,8 @@ struct snd_soc_component_driver { 
	int (*of_xlate_dai_name)(struct snd_soc_component *component,

				 struct of_phandle_args *args,

				 const char **dai_name);

	int (*of_xlate_dai_id)(struct snd_soc_component *comment,

			       struct device_node *endpoint);

	void (*seq_notifier)(struct snd_soc_component *, enum snd_soc_dapm_type,

		int subseq);

	int (*stream_event)(struct snd_soc_component *, int event);
@@ -1676,6 +1678,7 @@ unsigned int snd_soc_of_parse_daifmt(struct device_node *np, 
				     const char *prefix,

				     struct device_node **bitclkmaster,

				     struct device_node **framemaster);

int snd_soc_get_dai_id(struct device_node *ep);

int snd_soc_get_dai_name(struct of_phandle_args *args,

			 const char **dai_name);

int snd_soc_of_get_dai_name(struct device_node *of_node,

sound/soc/soc-core.c

+37 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ 
#include <linux/ctype.h>

#include <linux/slab.h>

#include <linux/of.h>

#include <linux/of_graph.h>

#include <linux/dmi.h>

#include <sound/core.h>

#include <sound/jack.h>
@@ -4044,6 +4045,42 @@ unsigned int snd_soc_of_parse_daifmt(struct device_node *np, 
}

EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);



int snd_soc_get_dai_id(struct device_node *ep)

{

	struct snd_soc_component *pos;

	struct device_node *node;

	int ret;



	node = of_graph_get_port_parent(ep);



	/*

	 * For example HDMI case, HDMI has video/sound port,

	 * but ALSA SoC needs sound port number only.

	 * Thus counting HDMI DT port/endpoint doesn't work.

	 * Then, it should have .of_xlate_dai_id

	 */

	ret = -ENOTSUPP;

	mutex_lock(&client_mutex);

	list_for_each_entry(pos, &component_list, list) {

		struct device_node *component_of_node = pos->dev->of_node;



		if (!component_of_node && pos->dev->parent)

			component_of_node = pos->dev->parent->of_node;



		if (component_of_node != node)

			continue;



		if (pos->driver->of_xlate_dai_id)

			ret = pos->driver->of_xlate_dai_id(pos, ep);



		break;

	}

	mutex_unlock(&client_mutex);



	return ret;

}

EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);



int snd_soc_get_dai_name(struct of_phandle_args *args,

				const char **dai_name)

{