From: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
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: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
---
include/sound/soc.h | 3 +++
sound/soc/soc-core.c | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 5170fd8..9c94b97 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -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,
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index ab7a07f..9ba1837 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -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>
@@ -4048,6 +4049,42 @@ 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)
{
--
1.9.1
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