SoC audio cards may have many CODECs per audio link. This patch exports a core function to handle such links when they are described in the DT.
Signed-off-by: Jean-Francois Moine moinejf@free.fr --- include/sound/soc.h | 3 +++ sound/soc/soc-core.c | 75 +++++++++++++++++++++++++++++++++++++++++----------- 2 files changed, 63 insertions(+), 15 deletions(-)
diff --git a/include/sound/soc.h b/include/sound/soc.h index 7ba7130..a255f8b 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -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_node *of_node, + const char *list_name, + struct snd_soc_dai_link *dai_link);
#include <sound/soc-dai.h>
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 4c8f8a2..a605de5 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -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, - const char **dai_name) +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 +4817,42 @@ int snd_soc_of_get_dai_name(struct device_node *of_node, } EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
+int snd_soc_of_get_dai_link_codecs(struct device_node *of_node, + const char *list_name, + struct snd_soc_dai_link *dai_link) +{ + struct of_phandle_args args; + struct snd_soc_dai_link_component *component; + int index, ret; + + for (index = 0, component = dai_link->codecs; + index < dai_link->num_codecs; + index++, component++) { + ret = of_parse_phandle_with_args(of_node, list_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((struct device_node *) component->of_node); + component->of_node = NULL; + } + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs); + static int __init snd_soc_init(void) { #ifdef CONFIG_DEBUG_FS