From cb470087669a3fab1958fec79dd7db280b33f178 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Tue, 10 Sep 2013 17:39:56 -0700 Subject: [PATCH] ASoC: add .of_xlate_dai_name on snd_soc_component_driver ASoC sound driver requires CPU/CODEC drivers for probing, and each CPU/CODEC has some DAI on it. Then, "dai name matching" have been used to identify CPU-CODEC DAI pair on ASoC. But, the "dai port number matching" is now required from DeviceTree. The solution of this issue is to replace the dai port number into dai name. Now, CPU/CODEC are based on struct snd_soc_component, and it can care above as common issue. This patch adds .of_xlate_dai_name callback interface on struct snd_soc_component_driver, and snd_soc_of_get_dai_name() which is using .of_xlate_dai_name. Then, #sound-dai-cells which enables DAI specifier is required on CPU/CODEC device tree properties. Signed-off-by: Kuninori Morimoto Signed-off-by: Mark Brown --- include/sound/soc.h | 8 ++++++++ sound/soc/soc-core.c | 35 +++++++++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+) diff --git a/include/sound/soc.h b/include/sound/soc.h index 9a81e2e7d661..1dd7dc5f7d52 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -13,6 +13,7 @@ #ifndef __LINUX_SND_SOC_H #define __LINUX_SND_SOC_H +#include #include #include #include @@ -673,6 +674,11 @@ struct snd_soc_cache_ops { /* component interface */ struct snd_soc_component_driver { const char *name; + + /* DT */ + int (*of_xlate_dai_name)(struct snd_soc_component *component, + struct of_phandle_args *args, + const char **dai_name); }; struct snd_soc_component { @@ -1206,6 +1212,8 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card, const char *propname); unsigned int snd_soc_of_parse_daifmt(struct device_node *np, const char *prefix); +int snd_soc_of_get_dai_name(struct device_node *of_node, + const char **dai_name); #include diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 014ac10267da..711bd362028d 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -4590,6 +4590,41 @@ 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) +{ + 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; + + mutex_lock(&client_mutex); + list_for_each_entry(pos, &component_list, list) { + if (pos->dev->of_node != args.np) + continue; + + if (!pos->driver->of_xlate_dai_name) { + ret = -ENOSYS; + break; + } + + ret = pos->driver->of_xlate_dai_name(pos, &args, dai_name); + break; + } + mutex_unlock(&client_mutex); + + of_node_put(args.np); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name); + static int __init snd_soc_init(void) { #ifdef CONFIG_DEBUG_FS -- 2.20.1