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ASoC: core: add multi-codec support in DT

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This patch exports a core function which handles the DT description
of multi-codec links (as: "sound-dai = <&hdmi 0>, <&spdif_codec>;")
and creates a CODEC component array in the DAI link.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jean-Francois Moine 2014-11-25 13:16:12 +01:00 committed by Mark Brown
parent f114040e3e
commit 93b0f3eeeb
2 changed files with 98 additions and 15 deletions
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3
include/sound/soc.h
View File

@ -1451,6 +1451,9 @@ unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
struct device_node **framemaster);
int snd_soc_of_get_dai_name(struct device_node *of_node,
const char **dai_name);
int snd_soc_of_get_dai_link_codecs(struct device *dev,
struct device_node *of_node,
struct snd_soc_dai_link *dai_link);
#include <sound/soc-dai.h>

108
sound/soc/soc-core.c
View File

@ -4750,36 +4750,30 @@ unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
int snd_soc_of_get_dai_name(struct device_node *of_node,
static int snd_soc_get_dai_name(struct of_phandle_args *args,
const char **dai_name)
{
struct snd_soc_component *pos;
struct of_phandle_args args;
int ret;
ret = of_parse_phandle_with_args(of_node, "sound-dai",
"#sound-dai-cells", 0, &args);
if (ret)
return ret;
ret = -EPROBE_DEFER;
int ret = -EPROBE_DEFER;
mutex_lock(&client_mutex);
list_for_each_entry(pos, &component_list, list) {
if (pos->dev->of_node != args.np)
if (pos->dev->of_node != args->np)
continue;
if (pos->driver->of_xlate_dai_name) {
ret = pos->driver->of_xlate_dai_name(pos, &args, dai_name);
ret = pos->driver->of_xlate_dai_name(pos,
args,
dai_name);
} else {
int id = -1;
switch (args.args_count) {
switch (args->args_count) {
case 0:
id = 0; /* same as dai_drv[0] */
break;
case 1:
id = args.args[0];
id = args->args[0];
break;
default:
/* not supported */
@ -4801,6 +4795,21 @@ int snd_soc_of_get_dai_name(struct device_node *of_node,
break;
}
mutex_unlock(&client_mutex);
return ret;
}
int snd_soc_of_get_dai_name(struct device_node *of_node,
const char **dai_name)
{
struct of_phandle_args args;
int ret;
ret = of_parse_phandle_with_args(of_node, "sound-dai",
"#sound-dai-cells", 0, &args);
if (ret)
return ret;
ret = snd_soc_get_dai_name(&args, dai_name);
of_node_put(args.np);
@ -4808,6 +4817,77 @@ int snd_soc_of_get_dai_name(struct device_node *of_node,
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
/*
* snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
* @dev: Card device
* @of_node: Device node
* @dai_link: DAI link
*
* Builds an array of CODEC DAI components from the DAI link property
* 'sound-dai'.
* The array is set in the DAI link and the number of DAIs is set accordingly.
* The device nodes in the array (of_node) must be dereferenced by the caller.
*
* Returns 0 for success
*/
int snd_soc_of_get_dai_link_codecs(struct device *dev,
struct device_node *of_node,
struct snd_soc_dai_link *dai_link)
{
struct of_phandle_args args;
struct snd_soc_dai_link_component *component;
char *name;
int index, num_codecs, ret;
/* Count the number of CODECs */
name = "sound-dai";
num_codecs = of_count_phandle_with_args(of_node, name,
"#sound-dai-cells");
if (num_codecs <= 0) {
if (num_codecs == -ENOENT)
dev_err(dev, "No 'sound-dai' property\n");
else
dev_err(dev, "Bad phandle in 'sound-dai'\n");
return num_codecs;
}
component = devm_kzalloc(dev,
sizeof *component * num_codecs,
GFP_KERNEL);
if (!component)
return -ENOMEM;
dai_link->codecs = component;
dai_link->num_codecs = num_codecs;
/* Parse the list */
for (index = 0, component = dai_link->codecs;
index < dai_link->num_codecs;
index++, component++) {
ret = of_parse_phandle_with_args(of_node, name,
"#sound-dai-cells",
index, &args);
if (ret)
goto err;
component->of_node = args.np;
ret = snd_soc_get_dai_name(&args, &component->dai_name);
if (ret < 0)
goto err;
}
return 0;
err:
for (index = 0, component = dai_link->codecs;
index < dai_link->num_codecs;
index++, component++) {
if (!component->of_node)
break;
of_node_put(component->of_node);
component->of_node = NULL;
}
dai_link->codecs = NULL;
dai_link->num_codecs = 0;
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
static int __init snd_soc_init(void)
{
#ifdef CONFIG_DEBUG_FS