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// SPDX-License-Identifier: GPL-2.0+
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// soc-core.c -- ALSA SoC Audio Layer
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// Copyright 2005 Wolfson Microelectronics PLC.
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// Copyright 2005 Openedhand Ltd.
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// Copyright (C) 2010 Slimlogic Ltd.
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// Copyright (C) 2010 Texas Instruments Inc.
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// Author: Liam Girdwood <lrg@slimlogic.co.uk>
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// with code, comments and ideas from :-
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// Richard Purdie <richard@openedhand.com>
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// o Add hw rules to enforce rates, etc.
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// o More testing with other codecs/machines.
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// o Add more codecs and platforms to ensure good API coverage.
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// o Support TDM on PCM and I2S
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/bitops.h>
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#include <linux/debugfs.h>
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#include <linux/platform_device.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/ctype.h>
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#include <linux/slab.h>
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#include <linux/of_graph.h>
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#include <linux/dmi.h>
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#include <dkms/sound/core.h>
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#include <dkms/sound/jack.h>
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#include <dkms/sound/pcm.h>
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#include <dkms/sound/pcm_params.h>
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#include <dkms/sound/soc.h>
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#include <dkms/sound/soc-dpcm.h>
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#include <dkms/sound/soc-topology.h>
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#include <dkms/sound/initval.h>
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#define CREATE_TRACE_POINTS
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#include <trace/events/asoc.h>
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#ifdef CONFIG_DEBUG_FS
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struct dentry *snd_soc_debugfs_root;
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EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
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static DEFINE_MUTEX(client_mutex);
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static LIST_HEAD(component_list);
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static LIST_HEAD(unbind_card_list);
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#define for_each_component(component) \
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list_for_each_entry(component, &component_list, list)
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* This is used if driver don't need to have CPU/Codec/Platform
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struct snd_soc_dai_link_component null_dailink_component[0];
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EXPORT_SYMBOL_GPL(null_dailink_component);
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* This is a timeout to do a DAPM powerdown after a stream is closed().
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* It can be used to eliminate pops between different playback streams, e.g.
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* between two audio tracks.
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static int pmdown_time = 5000;
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module_param(pmdown_time, int, 0);
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MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
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* If a DMI filed contain strings in this blacklist (e.g.
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* "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
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* as invalid and dropped when setting the card long name from DMI info.
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static const char * const dmi_blacklist[] = {
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"To be filled by OEM",
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NULL, /* terminator */
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static ssize_t pmdown_time_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
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return sprintf(buf, "%ld\n", rtd->pmdown_time);
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static ssize_t pmdown_time_set(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
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ret = kstrtol(buf, 10, &rtd->pmdown_time);
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static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
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static struct attribute *soc_dev_attrs[] = {
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&dev_attr_pmdown_time.attr,
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static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
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struct attribute *attr, int idx)
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struct device *dev = kobj_to_dev(kobj);
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struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
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if (attr == &dev_attr_pmdown_time.attr)
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return attr->mode; /* always visible */
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return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
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static const struct attribute_group soc_dapm_dev_group = {
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.attrs = soc_dapm_dev_attrs,
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.is_visible = soc_dev_attr_is_visible,
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static const struct attribute_group soc_dev_group = {
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.attrs = soc_dev_attrs,
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.is_visible = soc_dev_attr_is_visible,
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static const struct attribute_group *soc_dev_attr_groups[] = {
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#ifdef CONFIG_DEBUG_FS
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static void soc_init_component_debugfs(struct snd_soc_component *component)
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if (!component->card->debugfs_card_root)
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if (component->debugfs_prefix) {
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name = kasprintf(GFP_KERNEL, "%s:%s",
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component->debugfs_prefix, component->name);
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component->debugfs_root = debugfs_create_dir(name,
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component->card->debugfs_card_root);
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component->debugfs_root = debugfs_create_dir(component->name,
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component->card->debugfs_card_root);
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snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
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component->debugfs_root);
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static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
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if (!component->debugfs_root)
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debugfs_remove_recursive(component->debugfs_root);
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component->debugfs_root = NULL;
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static int dai_list_show(struct seq_file *m, void *v)
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struct snd_soc_component *component;
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struct snd_soc_dai *dai;
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mutex_lock(&client_mutex);
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for_each_component(component)
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for_each_component_dais(component, dai)
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seq_printf(m, "%s\n", dai->name);
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mutex_unlock(&client_mutex);
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DEFINE_SHOW_ATTRIBUTE(dai_list);
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static int component_list_show(struct seq_file *m, void *v)
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struct snd_soc_component *component;
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mutex_lock(&client_mutex);
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for_each_component(component)
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seq_printf(m, "%s\n", component->name);
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mutex_unlock(&client_mutex);
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DEFINE_SHOW_ATTRIBUTE(component_list);
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static void soc_init_card_debugfs(struct snd_soc_card *card)
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card->debugfs_card_root = debugfs_create_dir(card->name,
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snd_soc_debugfs_root);
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debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
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snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
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static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
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debugfs_remove_recursive(card->debugfs_card_root);
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card->debugfs_card_root = NULL;
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static void snd_soc_debugfs_init(void)
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snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
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debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
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debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
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&component_list_fops);
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static void snd_soc_debugfs_exit(void)
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debugfs_remove_recursive(snd_soc_debugfs_root);
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static inline void soc_init_component_debugfs(
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struct snd_soc_component *component)
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static inline void soc_cleanup_component_debugfs(
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struct snd_soc_component *component)
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static inline void soc_init_card_debugfs(struct snd_soc_card *card)
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static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
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static inline void snd_soc_debugfs_init(void)
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static inline void snd_soc_debugfs_exit(void)
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* This is glue code between snd_pcm_lib_ioctl() and
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* snd_soc_component_driver :: ioctl
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int snd_soc_pcm_lib_ioctl(struct snd_soc_component *component,
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struct snd_pcm_substream *substream,
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unsigned int cmd, void *arg)
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return snd_pcm_lib_ioctl(substream, cmd, arg);
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EXPORT_SYMBOL_GPL(snd_soc_pcm_lib_ioctl);
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static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
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struct snd_soc_component *component)
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struct snd_soc_rtdcom_list *rtdcom;
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struct snd_soc_component *comp;
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for_each_rtd_components(rtd, rtdcom, comp) {
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/* already connected */
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if (comp == component)
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* created rtdcom here will be freed when rtd->dev was freed.
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* soc_free_pcm_runtime() :: device_unregister(rtd->dev)
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rtdcom = devm_kzalloc(rtd->dev, sizeof(*rtdcom), GFP_KERNEL);
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rtdcom->component = component;
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INIT_LIST_HEAD(&rtdcom->list);
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* When rtd was freed, created rtdcom here will be
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* And we don't need to call list_del(&rtdcom->list)
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* when freed, because rtd is also freed.
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list_add_tail(&rtdcom->list, &rtd->component_list);
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struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
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const char *driver_name)
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struct snd_soc_rtdcom_list *rtdcom;
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struct snd_soc_component *component;
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* snd_soc_rtdcom_lookup() will find component from rtd by using
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* specified driver name.
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* But, if many components which have same driver name are connected
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* to 1 rtd, this function will return 1st found component.
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for_each_rtd_components(rtd, rtdcom, component) {
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const char *component_name = component->driver->name;
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if ((component_name == driver_name) ||
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strcmp(component_name, driver_name) == 0)
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return rtdcom->component;
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EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
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static struct snd_soc_component
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*snd_soc_lookup_component_nolocked(struct device *dev, const char *driver_name)
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struct snd_soc_component *component;
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struct snd_soc_component *found_component;
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found_component = NULL;
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for_each_component(component) {
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if ((dev == component->dev) &&
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(driver_name == component->driver->name) ||
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(strcmp(component->driver->name, driver_name) == 0))) {
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found_component = component;
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return found_component;
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struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
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const char *driver_name)
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struct snd_soc_component *component;
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mutex_lock(&client_mutex);
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component = snd_soc_lookup_component_nolocked(dev, driver_name);
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mutex_unlock(&client_mutex);
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EXPORT_SYMBOL_GPL(snd_soc_lookup_component);
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struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
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const char *dai_link, int stream)
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struct snd_soc_pcm_runtime *rtd;
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for_each_card_rtds(card, rtd) {
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if (rtd->dai_link->no_pcm &&
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!strcmp(rtd->dai_link->name, dai_link))
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return rtd->pcm->streams[stream].substream;
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dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
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EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
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static const struct snd_soc_ops null_snd_soc_ops;
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static void soc_release_rtd_dev(struct device *dev)
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/* "dev" means "rtd->dev" */
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static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
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list_del(&rtd->list);
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* we don't need to call kfree() for rtd->dev
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* soc_release_rtd_dev()
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* We don't need rtd->dev NULL check, because
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* it is alloced *before* rtd.
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* soc_new_pcm_runtime()
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device_unregister(rtd->dev);
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static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
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struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
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struct snd_soc_pcm_runtime *rtd;
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dev = kzalloc(sizeof(struct device), GFP_KERNEL);
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dev->parent = card->dev;
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dev->release = soc_release_rtd_dev;
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dev->groups = soc_dev_attr_groups;
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dev_set_name(dev, "%s", dai_link->name);
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ret = device_register(dev);
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put_device(dev); /* soc_release_rtd_dev */
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rtd = devm_kzalloc(dev, sizeof(*rtd), GFP_KERNEL);
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dev_set_drvdata(dev, rtd);
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* for rtd->codec_dais
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rtd->codec_dais = devm_kcalloc(dev, dai_link->num_codecs,
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sizeof(struct snd_soc_dai *),
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if (!rtd->codec_dais)
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* rtd remaining settings
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INIT_LIST_HEAD(&rtd->component_list);
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INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
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INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
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INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
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INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
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rtd->dai_link = dai_link;
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if (!rtd->dai_link->ops)
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rtd->dai_link->ops = &null_snd_soc_ops;
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/* see for_each_card_rtds */
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list_add_tail(&rtd->list, &card->rtd_list);
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rtd->num = card->num_rtd;
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soc_free_pcm_runtime(rtd);
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struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
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const char *dai_link)
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struct snd_soc_pcm_runtime *rtd;
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for_each_card_rtds(card, rtd) {
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if (!strcmp(rtd->dai_link->name, dai_link))
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dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
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EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
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static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
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struct snd_soc_pcm_runtime *rtd;
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for_each_card_rtds(card, rtd)
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flush_delayed_work(&rtd->delayed_work);
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#ifdef CONFIG_PM_SLEEP
529
/* powers down audio subsystem for suspend */
530
int snd_soc_suspend(struct device *dev)
532
struct snd_soc_card *card = dev_get_drvdata(dev);
533
struct snd_soc_component *component;
534
struct snd_soc_pcm_runtime *rtd;
537
/* If the card is not initialized yet there is nothing to do */
538
if (!card->instantiated)
542
* Due to the resume being scheduled into a workqueue we could
543
* suspend before that's finished - wait for it to complete.
545
snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
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/* we're going to block userspace touching us until resume completes */
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snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
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/* mute any active DACs */
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for_each_card_rtds(card, rtd) {
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struct snd_soc_dai *dai;
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if (rtd->dai_link->ignore_suspend)
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for_each_rtd_codec_dai(rtd, i, dai) {
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if (dai->playback_active)
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snd_soc_dai_digital_mute(dai, 1,
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SNDRV_PCM_STREAM_PLAYBACK);
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/* suspend all pcms */
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for_each_card_rtds(card, rtd) {
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if (rtd->dai_link->ignore_suspend)
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snd_pcm_suspend_all(rtd->pcm);
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if (card->suspend_pre)
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card->suspend_pre(card);
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for_each_card_rtds(card, rtd) {
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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if (rtd->dai_link->ignore_suspend)
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if (!cpu_dai->driver->bus_control)
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snd_soc_dai_suspend(cpu_dai);
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/* close any waiting streams */
586
snd_soc_flush_all_delayed_work(card);
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for_each_card_rtds(card, rtd) {
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if (rtd->dai_link->ignore_suspend)
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snd_soc_dapm_stream_event(rtd,
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SNDRV_PCM_STREAM_PLAYBACK,
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SND_SOC_DAPM_STREAM_SUSPEND);
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snd_soc_dapm_stream_event(rtd,
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SNDRV_PCM_STREAM_CAPTURE,
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SND_SOC_DAPM_STREAM_SUSPEND);
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/* Recheck all endpoints too, their state is affected by suspend */
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dapm_mark_endpoints_dirty(card);
604
snd_soc_dapm_sync(&card->dapm);
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/* suspend all COMPONENTs */
607
for_each_card_components(card, component) {
608
struct snd_soc_dapm_context *dapm =
609
snd_soc_component_get_dapm(component);
612
* If there are paths active then the COMPONENT will be held
613
* with bias _ON and should not be suspended.
615
if (!snd_soc_component_is_suspended(component)) {
616
switch (snd_soc_dapm_get_bias_level(dapm)) {
617
case SND_SOC_BIAS_STANDBY:
619
* If the COMPONENT is capable of idle
620
* bias off then being in STANDBY
621
* means it's doing something,
622
* otherwise fall through.
624
if (dapm->idle_bias_off) {
625
dev_dbg(component->dev,
626
"ASoC: idle_bias_off CODEC on over suspend\n");
631
case SND_SOC_BIAS_OFF:
632
snd_soc_component_suspend(component);
633
if (component->regmap)
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regcache_mark_dirty(component->regmap);
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/* deactivate pins to sleep state */
636
pinctrl_pm_select_sleep_state(component->dev);
639
dev_dbg(component->dev,
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"ASoC: COMPONENT is on over suspend\n");
646
for_each_card_rtds(card, rtd) {
647
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
649
if (rtd->dai_link->ignore_suspend)
652
if (cpu_dai->driver->bus_control)
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snd_soc_dai_suspend(cpu_dai);
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/* deactivate pins to sleep state */
656
pinctrl_pm_select_sleep_state(cpu_dai->dev);
659
if (card->suspend_post)
660
card->suspend_post(card);
664
EXPORT_SYMBOL_GPL(snd_soc_suspend);
667
* deferred resume work, so resume can complete before we finished
668
* setting our codec back up, which can be very slow on I2C
670
static void soc_resume_deferred(struct work_struct *work)
672
struct snd_soc_card *card =
673
container_of(work, struct snd_soc_card,
674
deferred_resume_work);
675
struct snd_soc_pcm_runtime *rtd;
676
struct snd_soc_component *component;
680
* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
681
* so userspace apps are blocked from touching us
684
dev_dbg(card->dev, "ASoC: starting resume work\n");
686
/* Bring us up into D2 so that DAPM starts enabling things */
687
snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
689
if (card->resume_pre)
690
card->resume_pre(card);
692
/* resume control bus DAIs */
693
for_each_card_rtds(card, rtd) {
694
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
696
if (rtd->dai_link->ignore_suspend)
699
if (cpu_dai->driver->bus_control)
700
snd_soc_dai_resume(cpu_dai);
703
for_each_card_components(card, component) {
704
if (snd_soc_component_is_suspended(component))
705
snd_soc_component_resume(component);
708
for_each_card_rtds(card, rtd) {
710
if (rtd->dai_link->ignore_suspend)
713
snd_soc_dapm_stream_event(rtd,
714
SNDRV_PCM_STREAM_PLAYBACK,
715
SND_SOC_DAPM_STREAM_RESUME);
717
snd_soc_dapm_stream_event(rtd,
718
SNDRV_PCM_STREAM_CAPTURE,
719
SND_SOC_DAPM_STREAM_RESUME);
722
/* unmute any active DACs */
723
for_each_card_rtds(card, rtd) {
724
struct snd_soc_dai *dai;
726
if (rtd->dai_link->ignore_suspend)
729
for_each_rtd_codec_dai(rtd, i, dai) {
730
if (dai->playback_active)
731
snd_soc_dai_digital_mute(dai, 0,
732
SNDRV_PCM_STREAM_PLAYBACK);
736
for_each_card_rtds(card, rtd) {
737
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
739
if (rtd->dai_link->ignore_suspend)
742
if (!cpu_dai->driver->bus_control)
743
snd_soc_dai_resume(cpu_dai);
746
if (card->resume_post)
747
card->resume_post(card);
749
dev_dbg(card->dev, "ASoC: resume work completed\n");
751
/* Recheck all endpoints too, their state is affected by suspend */
752
dapm_mark_endpoints_dirty(card);
753
snd_soc_dapm_sync(&card->dapm);
755
/* userspace can access us now we are back as we were before */
756
snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
759
/* powers up audio subsystem after a suspend */
760
int snd_soc_resume(struct device *dev)
762
struct snd_soc_card *card = dev_get_drvdata(dev);
763
bool bus_control = false;
764
struct snd_soc_pcm_runtime *rtd;
765
struct snd_soc_dai *codec_dai;
768
/* If the card is not initialized yet there is nothing to do */
769
if (!card->instantiated)
772
/* activate pins from sleep state */
773
for_each_card_rtds(card, rtd) {
774
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
777
pinctrl_pm_select_default_state(cpu_dai->dev);
779
for_each_rtd_codec_dai(rtd, i, codec_dai) {
780
if (codec_dai->active)
781
pinctrl_pm_select_default_state(codec_dai->dev);
786
* DAIs that also act as the control bus master might have other drivers
787
* hanging off them so need to resume immediately. Other drivers don't
788
* have that problem and may take a substantial amount of time to resume
789
* due to I/O costs and anti-pop so handle them out of line.
791
for_each_card_rtds(card, rtd) {
792
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
794
bus_control |= cpu_dai->driver->bus_control;
797
dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
798
soc_resume_deferred(&card->deferred_resume_work);
800
dev_dbg(dev, "ASoC: Scheduling resume work\n");
801
if (!schedule_work(&card->deferred_resume_work))
802
dev_err(dev, "ASoC: resume work item may be lost\n");
807
EXPORT_SYMBOL_GPL(snd_soc_resume);
809
static void soc_resume_init(struct snd_soc_card *card)
811
/* deferred resume work */
812
INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
815
#define snd_soc_suspend NULL
816
#define snd_soc_resume NULL
817
static inline void soc_resume_init(struct snd_soc_card *card)
822
static const struct snd_soc_dai_ops null_dai_ops = {
825
static struct device_node
826
*soc_component_to_node(struct snd_soc_component *component)
828
struct device_node *of_node;
830
of_node = component->dev->of_node;
831
if (!of_node && component->dev->parent)
832
of_node = component->dev->parent->of_node;
837
static int snd_soc_is_matching_component(
838
const struct snd_soc_dai_link_component *dlc,
839
struct snd_soc_component *component)
841
struct device_node *component_of_node;
846
component_of_node = soc_component_to_node(component);
848
if (dlc->of_node && component_of_node != dlc->of_node)
850
if (dlc->name && strcmp(component->name, dlc->name))
856
static struct snd_soc_component *soc_find_component(
857
const struct snd_soc_dai_link_component *dlc)
859
struct snd_soc_component *component;
861
lockdep_assert_held(&client_mutex);
866
* It returns *1st* found component, but some driver
867
* has few components by same of_node/name
869
* CPU component and generic DMAEngine component
871
for_each_component(component)
872
if (snd_soc_is_matching_component(dlc, component))
879
* snd_soc_find_dai - Find a registered DAI
881
* @dlc: name of the DAI or the DAI driver and optional component info to match
883
* This function will search all registered components and their DAIs to
884
* find the DAI of the same name. The component's of_node and name
885
* should also match if being specified.
887
* Return: pointer of DAI, or NULL if not found.
889
struct snd_soc_dai *snd_soc_find_dai(
890
const struct snd_soc_dai_link_component *dlc)
892
struct snd_soc_component *component;
893
struct snd_soc_dai *dai;
895
lockdep_assert_held(&client_mutex);
897
/* Find CPU DAI from registered DAIs */
898
for_each_component(component) {
899
if (!snd_soc_is_matching_component(dlc, component))
901
for_each_component_dais(component, dai) {
902
if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
903
&& (!dai->driver->name
904
|| strcmp(dai->driver->name, dlc->dai_name)))
913
EXPORT_SYMBOL_GPL(snd_soc_find_dai);
916
* snd_soc_find_dai_link - Find a DAI link
919
* @id: DAI link ID to match
920
* @name: DAI link name to match, optional
921
* @stream_name: DAI link stream name to match, optional
923
* This function will search all existing DAI links of the soc card to
924
* find the link of the same ID. Since DAI links may not have their
925
* unique ID, so name and stream name should also match if being
928
* Return: pointer of DAI link, or NULL if not found.
930
struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
931
int id, const char *name,
932
const char *stream_name)
934
struct snd_soc_dai_link *link;
936
lockdep_assert_held(&client_mutex);
938
for_each_card_links(card, link) {
942
if (name && (!link->name || strcmp(name, link->name)))
945
if (stream_name && (!link->stream_name
946
|| strcmp(stream_name, link->stream_name)))
954
EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);
956
static bool soc_is_dai_link_bound(struct snd_soc_card *card,
957
struct snd_soc_dai_link *dai_link)
959
struct snd_soc_pcm_runtime *rtd;
961
for_each_card_rtds(card, rtd) {
962
if (rtd->dai_link == dai_link)
969
static int soc_dai_link_sanity_check(struct snd_soc_card *card,
970
struct snd_soc_dai_link *link)
973
struct snd_soc_dai_link_component *codec, *platform;
975
for_each_link_codecs(link, i, codec) {
977
* Codec must be specified by 1 of name or OF node,
978
* not both or neither.
980
if (!!codec->name == !!codec->of_node) {
981
dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
986
/* Codec DAI name must be specified */
987
if (!codec->dai_name) {
988
dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
994
* Defer card registration if codec component is not added to
997
if (!soc_find_component(codec))
998
return -EPROBE_DEFER;
1001
for_each_link_platforms(link, i, platform) {
1003
* Platform may be specified by either name or OF node, but it
1004
* can be left unspecified, then no components will be inserted
1005
* in the rtdcom list
1007
if (!!platform->name == !!platform->of_node) {
1009
"ASoC: Neither/both platform name/of_node are set for %s\n",
1015
* Defer card registration if platform component is not added to
1018
if (!soc_find_component(platform))
1019
return -EPROBE_DEFER;
1023
if (link->num_cpus > 1) {
1025
"ASoC: multi cpu is not yet supported %s\n",
1031
* CPU device may be specified by either name or OF node, but
1032
* can be left unspecified, and will be matched based on DAI
1035
if (link->cpus->name && link->cpus->of_node) {
1037
"ASoC: Neither/both cpu name/of_node are set for %s\n",
1043
* Defer card registration if cpu dai component is not added to
1046
if ((link->cpus->of_node || link->cpus->name) &&
1047
!soc_find_component(link->cpus))
1048
return -EPROBE_DEFER;
1051
* At least one of CPU DAI name or CPU device name/node must be
1054
if (!link->cpus->dai_name &&
1055
!(link->cpus->name || link->cpus->of_node)) {
1057
"ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
1065
static void soc_unbind_dai_link(struct snd_soc_card *card,
1066
struct snd_soc_dai_link *dai_link)
1068
struct snd_soc_pcm_runtime *rtd;
1070
rtd = snd_soc_get_pcm_runtime(card, dai_link->name);
1072
soc_free_pcm_runtime(rtd);
1075
static int soc_bind_dai_link(struct snd_soc_card *card,
1076
struct snd_soc_dai_link *dai_link)
1078
struct snd_soc_pcm_runtime *rtd;
1079
struct snd_soc_dai_link_component *codec, *platform;
1080
struct snd_soc_component *component;
1083
if (dai_link->ignore)
1086
dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1088
if (soc_is_dai_link_bound(card, dai_link)) {
1089
dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
1094
ret = soc_dai_link_sanity_check(card, dai_link);
1098
rtd = soc_new_pcm_runtime(card, dai_link);
1102
/* FIXME: we need multi CPU support in the future */
1103
rtd->cpu_dai = snd_soc_find_dai(dai_link->cpus);
1104
if (!rtd->cpu_dai) {
1105
dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
1106
dai_link->cpus->dai_name);
1109
snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
1111
/* Find CODEC from registered CODECs */
1112
rtd->num_codecs = dai_link->num_codecs;
1113
for_each_link_codecs(dai_link, i, codec) {
1114
rtd->codec_dais[i] = snd_soc_find_dai(codec);
1115
if (!rtd->codec_dais[i]) {
1116
dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
1121
snd_soc_rtdcom_add(rtd, rtd->codec_dais[i]->component);
1124
/* Single codec links expect codec and codec_dai in runtime data */
1125
rtd->codec_dai = rtd->codec_dais[0];
1127
/* Find PLATFORM from registered PLATFORMs */
1128
for_each_link_platforms(dai_link, i, platform) {
1129
for_each_component(component) {
1130
if (!snd_soc_is_matching_component(platform, component))
1133
snd_soc_rtdcom_add(rtd, component);
1140
soc_free_pcm_runtime(rtd);
1141
return -EPROBE_DEFER;
1144
static void soc_set_of_name_prefix(struct snd_soc_component *component)
1146
struct device_node *of_node = soc_component_to_node(component);
1150
ret = of_property_read_string(of_node, "sound-name-prefix", &str);
1152
component->name_prefix = str;
1155
static void soc_set_name_prefix(struct snd_soc_card *card,
1156
struct snd_soc_component *component)
1160
for (i = 0; i < card->num_configs && card->codec_conf; i++) {
1161
struct snd_soc_codec_conf *map = &card->codec_conf[i];
1162
struct device_node *of_node = soc_component_to_node(component);
1164
if (map->of_node && of_node != map->of_node)
1166
if (map->dev_name && strcmp(component->name, map->dev_name))
1168
component->name_prefix = map->name_prefix;
1173
* If there is no configuration table or no match in the table,
1174
* check if a prefix is provided in the node
1176
soc_set_of_name_prefix(component);
1179
static void soc_cleanup_component(struct snd_soc_component *component)
1181
/* For framework level robustness */
1182
snd_soc_component_set_jack(component, NULL, NULL);
1184
list_del_init(&component->card_list);
1185
snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1186
soc_cleanup_component_debugfs(component);
1187
component->card = NULL;
1188
snd_soc_component_module_put_when_remove(component);
1191
static void soc_remove_component(struct snd_soc_component *component)
1193
if (!component->card)
1196
snd_soc_component_remove(component);
1198
soc_cleanup_component(component);
1201
static int soc_probe_component(struct snd_soc_card *card,
1202
struct snd_soc_component *component)
1204
struct snd_soc_dapm_context *dapm =
1205
snd_soc_component_get_dapm(component);
1206
struct snd_soc_dai *dai;
1209
if (!strcmp(component->name, "snd-soc-dummy"))
1212
if (component->card) {
1213
if (component->card != card) {
1214
dev_err(component->dev,
1215
"Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1216
card->name, component->card->name);
1222
ret = snd_soc_component_module_get_when_probe(component);
1226
component->card = card;
1227
soc_set_name_prefix(card, component);
1229
soc_init_component_debugfs(component);
1231
snd_soc_dapm_init(dapm, card, component);
1233
ret = snd_soc_dapm_new_controls(dapm,
1234
component->driver->dapm_widgets,
1235
component->driver->num_dapm_widgets);
1238
dev_err(component->dev,
1239
"Failed to create new controls %d\n", ret);
1243
for_each_component_dais(component, dai) {
1244
ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1246
dev_err(component->dev,
1247
"Failed to create DAI widgets %d\n", ret);
1252
ret = snd_soc_component_probe(component);
1254
dev_err(component->dev,
1255
"ASoC: failed to probe component %d\n", ret);
1258
WARN(dapm->idle_bias_off &&
1259
dapm->bias_level != SND_SOC_BIAS_OFF,
1260
"codec %s can not start from non-off bias with idle_bias_off==1\n",
1263
/* machine specific init */
1264
if (component->init) {
1265
ret = component->init(component);
1267
dev_err(component->dev,
1268
"Failed to do machine specific init %d\n", ret);
1273
ret = snd_soc_add_component_controls(component,
1274
component->driver->controls,
1275
component->driver->num_controls);
1279
ret = snd_soc_dapm_add_routes(dapm,
1280
component->driver->dapm_routes,
1281
component->driver->num_dapm_routes);
1285
/* see for_each_card_components */
1286
list_add(&component->card_list, &card->component_dev_list);
1290
soc_cleanup_component(component);
1295
static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1299
if (!dai || !dai->probed || !dai->driver ||
1300
dai->driver->remove_order != order)
1303
err = snd_soc_dai_remove(dai);
1306
"ASoC: failed to remove %s: %d\n",
1312
static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1317
dai->driver->probe_order != order)
1320
ret = snd_soc_dai_probe(dai);
1322
dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
1332
static void soc_remove_link_dais(struct snd_soc_card *card)
1335
struct snd_soc_dai *codec_dai;
1336
struct snd_soc_pcm_runtime *rtd;
1339
for_each_comp_order(order) {
1340
for_each_card_rtds(card, rtd) {
1341
/* remove the CODEC DAI */
1342
for_each_rtd_codec_dai(rtd, i, codec_dai)
1343
soc_remove_dai(codec_dai, order);
1345
soc_remove_dai(rtd->cpu_dai, order);
1350
static int soc_probe_link_dais(struct snd_soc_card *card)
1352
struct snd_soc_dai *codec_dai;
1353
struct snd_soc_pcm_runtime *rtd;
1356
for_each_comp_order(order) {
1357
for_each_card_rtds(card, rtd) {
1360
"ASoC: probe %s dai link %d late %d\n",
1361
card->name, rtd->num, order);
1363
ret = soc_probe_dai(rtd->cpu_dai, order);
1367
/* probe the CODEC DAI */
1368
for_each_rtd_codec_dai(rtd, i, codec_dai) {
1369
ret = soc_probe_dai(codec_dai, order);
1379
static void soc_remove_link_components(struct snd_soc_card *card)
1381
struct snd_soc_component *component;
1382
struct snd_soc_pcm_runtime *rtd;
1383
struct snd_soc_rtdcom_list *rtdcom;
1386
for_each_comp_order(order) {
1387
for_each_card_rtds(card, rtd) {
1388
for_each_rtd_components(rtd, rtdcom, component) {
1389
if (component->driver->remove_order != order)
1392
soc_remove_component(component);
1398
static int soc_probe_link_components(struct snd_soc_card *card)
1400
struct snd_soc_component *component;
1401
struct snd_soc_pcm_runtime *rtd;
1402
struct snd_soc_rtdcom_list *rtdcom;
1405
for_each_comp_order(order) {
1406
for_each_card_rtds(card, rtd) {
1407
for_each_rtd_components(rtd, rtdcom, component) {
1408
if (component->driver->probe_order != order)
1411
ret = soc_probe_component(card, component);
1421
void snd_soc_disconnect_sync(struct device *dev)
1423
struct snd_soc_component *component =
1424
snd_soc_lookup_component(dev, NULL);
1426
if (!component || !component->card)
1429
snd_card_disconnect_sync(component->card->snd_card);
1431
EXPORT_SYMBOL_GPL(snd_soc_disconnect_sync);
1434
* snd_soc_add_dai_link - Add a DAI link dynamically
1435
* @card: The ASoC card to which the DAI link is added
1436
* @dai_link: The new DAI link to add
1438
* This function adds a DAI link to the ASoC card's link list.
1440
* Note: Topology can use this API to add DAI links when probing the
1441
* topology component. And machine drivers can still define static
1442
* DAI links in dai_link array.
1444
int snd_soc_add_dai_link(struct snd_soc_card *card,
1445
struct snd_soc_dai_link *dai_link)
1449
lockdep_assert_held(&client_mutex);
1452
* Notify the machine driver for extra initialization
1454
if (card->add_dai_link)
1455
card->add_dai_link(card, dai_link);
1457
ret = soc_bind_dai_link(card, dai_link);
1461
/* see for_each_card_links */
1462
list_add_tail(&dai_link->list, &card->dai_link_list);
1466
EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);
1469
* snd_soc_remove_dai_link - Remove a DAI link from the list
1470
* @card: The ASoC card that owns the link
1471
* @dai_link: The DAI link to remove
1472
* @unbind: unbind dai link
1474
* This function removes a DAI link from the ASoC card's link list.
1476
* For DAI links previously added by topology, topology should
1477
* remove them by using the dobj embedded in the link.
1479
void snd_soc_remove_dai_link(struct snd_soc_card *card,
1480
struct snd_soc_dai_link *dai_link,
1483
lockdep_assert_held(&client_mutex);
1486
* Notify the machine driver for extra destruction
1488
if (card->remove_dai_link)
1489
card->remove_dai_link(card, dai_link);
1491
list_del(&dai_link->list);
1494
soc_unbind_dai_link(card, dai_link);
1496
EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);
1498
static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
1499
struct snd_soc_pcm_runtime *rtd)
1503
for (i = 0; i < num_dais; ++i) {
1504
struct snd_soc_dai_driver *drv = dais[i]->driver;
1507
ret = drv->pcm_new(rtd, dais[i]);
1509
dev_err(dais[i]->dev,
1510
"ASoC: Failed to bind %s with pcm device\n",
1519
static int soc_link_init(struct snd_soc_card *card,
1520
struct snd_soc_pcm_runtime *rtd)
1522
struct snd_soc_dai_link *dai_link = rtd->dai_link;
1523
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1524
struct snd_soc_rtdcom_list *rtdcom;
1525
struct snd_soc_component *component;
1528
/* set default power off timeout */
1529
rtd->pmdown_time = pmdown_time;
1531
/* do machine specific initialization */
1532
if (dai_link->init) {
1533
ret = dai_link->init(rtd);
1535
dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1536
dai_link->name, ret);
1541
if (dai_link->dai_fmt) {
1542
ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1547
/* add DPCM sysfs entries */
1548
soc_dpcm_debugfs_add(rtd);
1553
* most drivers will register their PCMs using DAI link ordering but
1554
* topology based drivers can use the DAI link id field to set PCM
1555
* device number and then use rtd + a base offset of the BEs.
1557
for_each_rtd_components(rtd, rtdcom, component) {
1558
if (!component->driver->use_dai_pcm_id)
1561
if (rtd->dai_link->no_pcm)
1562
num += component->driver->be_pcm_base;
1564
num = rtd->dai_link->id;
1567
/* create compress_device if possible */
1568
ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
1569
if (ret != -ENOTSUPP) {
1571
dev_err(card->dev, "ASoC: can't create compress %s\n",
1572
dai_link->stream_name);
1576
/* create the pcm */
1577
ret = soc_new_pcm(rtd, num);
1579
dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1580
dai_link->stream_name, ret);
1583
ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
1586
ret = soc_link_dai_pcm_new(rtd->codec_dais,
1587
rtd->num_codecs, rtd);
1591
static void soc_unbind_aux_dev(struct snd_soc_card *card)
1593
struct snd_soc_component *component, *_component;
1595
for_each_card_auxs_safe(card, component, _component) {
1596
component->init = NULL;
1597
list_del(&component->card_aux_list);
1601
static int soc_bind_aux_dev(struct snd_soc_card *card)
1603
struct snd_soc_component *component;
1604
struct snd_soc_aux_dev *aux;
1607
for_each_card_pre_auxs(card, i, aux) {
1608
/* codecs, usually analog devices */
1609
component = soc_find_component(&aux->dlc);
1611
return -EPROBE_DEFER;
1613
component->init = aux->init;
1614
/* see for_each_card_auxs */
1615
list_add(&component->card_aux_list, &card->aux_comp_list);
1620
static int soc_probe_aux_devices(struct snd_soc_card *card)
1622
struct snd_soc_component *comp;
1626
for_each_comp_order(order) {
1627
for_each_card_auxs(card, comp) {
1628
if (comp->driver->probe_order == order) {
1629
ret = soc_probe_component(card, comp);
1632
"ASoC: failed to probe aux component %s %d\n",
1643
static void soc_remove_aux_devices(struct snd_soc_card *card)
1645
struct snd_soc_component *comp, *_comp;
1648
for_each_comp_order(order) {
1649
for_each_card_auxs_safe(card, comp, _comp) {
1650
if (comp->driver->remove_order == order)
1651
soc_remove_component(comp);
1657
* snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1658
* @rtd: The runtime for which the DAI link format should be changed
1659
* @dai_fmt: The new DAI link format
1661
* This function updates the DAI link format for all DAIs connected to the DAI
1662
* link for the specified runtime.
1664
* Note: For setups with a static format set the dai_fmt field in the
1665
* corresponding snd_dai_link struct instead of using this function.
1667
* Returns 0 on success, otherwise a negative error code.
1669
int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1670
unsigned int dai_fmt)
1672
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1673
struct snd_soc_dai *codec_dai;
1677
for_each_rtd_codec_dai(rtd, i, codec_dai) {
1678
ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1679
if (ret != 0 && ret != -ENOTSUPP) {
1680
dev_warn(codec_dai->dev,
1681
"ASoC: Failed to set DAI format: %d\n", ret);
1687
* Flip the polarity for the "CPU" end of a CODEC<->CODEC link
1688
* the component which has non_legacy_dai_naming is Codec
1690
if (cpu_dai->component->driver->non_legacy_dai_naming) {
1691
unsigned int inv_dai_fmt;
1693
inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1694
switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1695
case SND_SOC_DAIFMT_CBM_CFM:
1696
inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1698
case SND_SOC_DAIFMT_CBM_CFS:
1699
inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1701
case SND_SOC_DAIFMT_CBS_CFM:
1702
inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1704
case SND_SOC_DAIFMT_CBS_CFS:
1705
inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1709
dai_fmt = inv_dai_fmt;
1712
ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1713
if (ret != 0 && ret != -ENOTSUPP) {
1714
dev_warn(cpu_dai->dev,
1715
"ASoC: Failed to set DAI format: %d\n", ret);
1721
EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1725
* Trim special characters, and replace '-' with '_' since '-' is used to
1726
* separate different DMI fields in the card long name. Only number and
1727
* alphabet characters and a few separator characters are kept.
1729
static void cleanup_dmi_name(char *name)
1733
for (i = 0; name[i]; i++) {
1734
if (isalnum(name[i]) || (name[i] == '.')
1735
|| (name[i] == '_'))
1736
name[j++] = name[i];
1737
else if (name[i] == '-')
1745
* Check if a DMI field is valid, i.e. not containing any string
1746
* in the black list.
1748
static int is_dmi_valid(const char *field)
1752
while (dmi_blacklist[i]) {
1753
if (strstr(field, dmi_blacklist[i]))
1762
* snd_soc_set_dmi_name() - Register DMI names to card
1763
* @card: The card to register DMI names
1764
* @flavour: The flavour "differentiator" for the card amongst its peers.
1766
* An Intel machine driver may be used by many different devices but are
1767
* difficult for userspace to differentiate, since machine drivers ususally
1768
* use their own name as the card short name and leave the card long name
1769
* blank. To differentiate such devices and fix bugs due to lack of
1770
* device-specific configurations, this function allows DMI info to be used
1771
* as the sound card long name, in the format of
1772
* "vendor-product-version-board"
1773
* (Character '-' is used to separate different DMI fields here).
1774
* This will help the user space to load the device-specific Use Case Manager
1775
* (UCM) configurations for the card.
1777
* Possible card long names may be:
1778
* DellInc.-XPS139343-01-0310JH
1779
* ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
1780
* Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
1782
* This function also supports flavoring the card longname to provide
1783
* the extra differentiation, like "vendor-product-version-board-flavor".
1785
* We only keep number and alphabet characters and a few separator characters
1786
* in the card long name since UCM in the user space uses the card long names
1787
* as card configuration directory names and AudoConf cannot support special
1788
* charactors like SPACE.
1790
* Returns 0 on success, otherwise a negative error code.
1792
int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
1794
const char *vendor, *product, *product_version, *board;
1795
size_t longname_buf_size = sizeof(card->snd_card->longname);
1798
if (card->long_name)
1799
return 0; /* long name already set by driver or from DMI */
1801
/* make up dmi long name as: vendor.product.version.board */
1802
vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1803
if (!vendor || !is_dmi_valid(vendor)) {
1804
dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
1808
snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
1810
cleanup_dmi_name(card->dmi_longname);
1812
product = dmi_get_system_info(DMI_PRODUCT_NAME);
1813
if (product && is_dmi_valid(product)) {
1814
len = strlen(card->dmi_longname);
1815
snprintf(card->dmi_longname + len,
1816
longname_buf_size - len,
1819
len++; /* skip the separator "-" */
1820
if (len < longname_buf_size)
1821
cleanup_dmi_name(card->dmi_longname + len);
1824
* some vendors like Lenovo may only put a self-explanatory
1825
* name in the product version field
1827
product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1828
if (product_version && is_dmi_valid(product_version)) {
1829
len = strlen(card->dmi_longname);
1830
snprintf(card->dmi_longname + len,
1831
longname_buf_size - len,
1832
"-%s", product_version);
1835
if (len < longname_buf_size)
1836
cleanup_dmi_name(card->dmi_longname + len);
1840
board = dmi_get_system_info(DMI_BOARD_NAME);
1841
if (board && is_dmi_valid(board)) {
1842
len = strlen(card->dmi_longname);
1843
snprintf(card->dmi_longname + len,
1844
longname_buf_size - len,
1848
if (len < longname_buf_size)
1849
cleanup_dmi_name(card->dmi_longname + len);
1850
} else if (!product) {
1851
/* fall back to using legacy name */
1852
dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
1856
/* Add flavour to dmi long name */
1858
len = strlen(card->dmi_longname);
1859
snprintf(card->dmi_longname + len,
1860
longname_buf_size - len,
1864
if (len < longname_buf_size)
1865
cleanup_dmi_name(card->dmi_longname + len);
1868
/* set the card long name */
1869
card->long_name = card->dmi_longname;
1873
EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1874
#endif /* CONFIG_DMI */
1876
static void soc_check_tplg_fes(struct snd_soc_card *card)
1878
struct snd_soc_component *component;
1879
const struct snd_soc_component_driver *comp_drv;
1880
struct snd_soc_dai_link *dai_link;
1883
for_each_component(component) {
1885
/* does this component override BEs ? */
1886
if (!component->driver->ignore_machine)
1889
/* for this machine ? */
1890
if (!strcmp(component->driver->ignore_machine,
1891
card->dev->driver->name))
1893
if (strcmp(component->driver->ignore_machine,
1894
dev_name(card->dev)))
1897
/* machine matches, so override the rtd data */
1898
for_each_card_prelinks(card, i, dai_link) {
1900
/* ignore this FE */
1901
if (dai_link->dynamic) {
1902
dai_link->ignore = true;
1906
dev_info(card->dev, "info: override BE DAI link %s\n",
1907
card->dai_link[i].name);
1909
/* override platform component */
1910
if (!dai_link->platforms) {
1911
dev_err(card->dev, "init platform error");
1914
dai_link->platforms->name = component->name;
1916
/* convert non BE into BE */
1917
dai_link->no_pcm = 1;
1919
/* override any BE fixups */
1920
dai_link->be_hw_params_fixup =
1921
component->driver->be_hw_params_fixup;
1924
* most BE links don't set stream name, so set it to
1925
* dai link name if it's NULL to help bind widgets.
1927
if (!dai_link->stream_name)
1928
dai_link->stream_name = dai_link->name;
1931
/* Inform userspace we are using alternate topology */
1932
if (component->driver->topology_name_prefix) {
1934
/* topology shortname created? */
1935
if (!card->topology_shortname_created) {
1936
comp_drv = component->driver;
1938
snprintf(card->topology_shortname, 32, "%s-%s",
1939
comp_drv->topology_name_prefix,
1941
card->topology_shortname_created = true;
1944
/* use topology shortname */
1945
card->name = card->topology_shortname;
1950
#define soc_setup_card_name(name, name1, name2, norm) \
1951
__soc_setup_card_name(name, sizeof(name), name1, name2, norm)
1952
static void __soc_setup_card_name(char *name, int len,
1953
const char *name1, const char *name2,
1958
snprintf(name, len, "%s", name1 ? name1 : name2);
1964
* Name normalization
1966
* The driver name is somewhat special, as it's used as a key for
1967
* searches in the user-space.
1970
* "abcd??efg" -> "abcd__efg"
1972
for (i = 0; i < len; i++) {
1979
if (!isalnum(name[i]))
1986
static void soc_cleanup_card_resources(struct snd_soc_card *card)
1988
struct snd_soc_dai_link *link, *_link;
1990
/* This should be called before snd_card_free() */
1991
soc_remove_link_components(card);
1993
/* free the ALSA card at first; this syncs with pending operations */
1994
if (card->snd_card) {
1995
snd_card_free(card->snd_card);
1996
card->snd_card = NULL;
1999
/* remove and free each DAI */
2000
soc_remove_link_dais(card);
2002
for_each_card_links_safe(card, link, _link)
2003
snd_soc_remove_dai_link(card, link, true);
2005
/* remove auxiliary devices */
2006
soc_remove_aux_devices(card);
2007
soc_unbind_aux_dev(card);
2009
snd_soc_dapm_free(&card->dapm);
2010
soc_cleanup_card_debugfs(card);
2012
/* remove the card */
2017
static int snd_soc_instantiate_card(struct snd_soc_card *card)
2019
struct snd_soc_pcm_runtime *rtd;
2020
struct snd_soc_dai_link *dai_link;
2023
mutex_lock(&client_mutex);
2024
mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
2026
snd_soc_dapm_init(&card->dapm, card, NULL);
2028
/* check whether any platform is ignore machine FE and using topology */
2029
soc_check_tplg_fes(card);
2031
/* bind aux_devs too */
2032
ret = soc_bind_aux_dev(card);
2036
/* add predefined DAI links to the list */
2038
for_each_card_prelinks(card, i, dai_link) {
2039
ret = snd_soc_add_dai_link(card, dai_link);
2044
/* card bind complete so register a sound card */
2045
ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
2046
card->owner, 0, &card->snd_card);
2049
"ASoC: can't create sound card for card %s: %d\n",
2054
soc_init_card_debugfs(card);
2056
soc_resume_init(card);
2058
ret = snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
2059
card->num_dapm_widgets);
2063
ret = snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
2064
card->num_of_dapm_widgets);
2068
/* initialise the sound card only once */
2070
ret = card->probe(card);
2075
/* probe all components used by DAI links on this card */
2076
ret = soc_probe_link_components(card);
2079
"ASoC: failed to instantiate card %d\n", ret);
2083
/* probe auxiliary components */
2084
ret = soc_probe_aux_devices(card);
2088
/* probe all DAI links on this card */
2089
ret = soc_probe_link_dais(card);
2092
"ASoC: failed to instantiate card %d\n", ret);
2096
for_each_card_rtds(card, rtd)
2097
soc_link_init(card, rtd);
2099
snd_soc_dapm_link_dai_widgets(card);
2100
snd_soc_dapm_connect_dai_link_widgets(card);
2102
ret = snd_soc_add_card_controls(card, card->controls,
2103
card->num_controls);
2107
ret = snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
2108
card->num_dapm_routes);
2112
ret = snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
2113
card->num_of_dapm_routes);
2117
/* try to set some sane longname if DMI is available */
2118
snd_soc_set_dmi_name(card, NULL);
2120
soc_setup_card_name(card->snd_card->shortname,
2121
card->name, NULL, 0);
2122
soc_setup_card_name(card->snd_card->longname,
2123
card->long_name, card->name, 0);
2124
soc_setup_card_name(card->snd_card->driver,
2125
card->driver_name, card->name, 1);
2127
if (card->late_probe) {
2128
ret = card->late_probe(card);
2130
dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2136
snd_soc_dapm_new_widgets(card);
2138
ret = snd_card_register(card->snd_card);
2140
dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
2145
card->instantiated = 1;
2146
dapm_mark_endpoints_dirty(card);
2147
snd_soc_dapm_sync(&card->dapm);
2151
soc_cleanup_card_resources(card);
2153
mutex_unlock(&card->mutex);
2154
mutex_unlock(&client_mutex);
2159
/* probes a new socdev */
2160
static int soc_probe(struct platform_device *pdev)
2162
struct snd_soc_card *card = platform_get_drvdata(pdev);
2165
* no card, so machine driver should be registering card
2166
* we should not be here in that case so ret error
2171
dev_warn(&pdev->dev,
2172
"ASoC: machine %s should use snd_soc_register_card()\n",
2175
/* Bodge while we unpick instantiation */
2176
card->dev = &pdev->dev;
2178
return snd_soc_register_card(card);
2181
/* removes a socdev */
2182
static int soc_remove(struct platform_device *pdev)
2184
struct snd_soc_card *card = platform_get_drvdata(pdev);
2186
snd_soc_unregister_card(card);
2190
int snd_soc_poweroff(struct device *dev)
2192
struct snd_soc_card *card = dev_get_drvdata(dev);
2193
struct snd_soc_pcm_runtime *rtd;
2195
if (!card->instantiated)
2199
* Flush out pmdown_time work - we actually do want to run it
2200
* now, we're shutting down so no imminent restart.
2202
snd_soc_flush_all_delayed_work(card);
2204
snd_soc_dapm_shutdown(card);
2206
/* deactivate pins to sleep state */
2207
for_each_card_rtds(card, rtd) {
2208
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2209
struct snd_soc_dai *codec_dai;
2212
pinctrl_pm_select_sleep_state(cpu_dai->dev);
2213
for_each_rtd_codec_dai(rtd, i, codec_dai) {
2214
pinctrl_pm_select_sleep_state(codec_dai->dev);
2220
EXPORT_SYMBOL_GPL(snd_soc_poweroff);
2222
const struct dev_pm_ops snd_soc_pm_ops = {
2223
.suspend = snd_soc_suspend,
2224
.resume = snd_soc_resume,
2225
.freeze = snd_soc_suspend,
2226
.thaw = snd_soc_resume,
2227
.poweroff = snd_soc_poweroff,
2228
.restore = snd_soc_resume,
2230
EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
2232
/* ASoC platform driver */
2233
static struct platform_driver soc_driver = {
2235
.name = "soc-audio",
2236
.pm = &snd_soc_pm_ops,
2239
.remove = soc_remove,
2243
* snd_soc_cnew - create new control
2244
* @_template: control template
2245
* @data: control private data
2246
* @long_name: control long name
2247
* @prefix: control name prefix
2249
* Create a new mixer control from a template control.
2251
* Returns 0 for success, else error.
2253
struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2254
void *data, const char *long_name,
2257
struct snd_kcontrol_new template;
2258
struct snd_kcontrol *kcontrol;
2261
memcpy(&template, _template, sizeof(template));
2265
long_name = template.name;
2268
name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2272
template.name = name;
2274
template.name = long_name;
2277
kcontrol = snd_ctl_new1(&template, data);
2283
EXPORT_SYMBOL_GPL(snd_soc_cnew);
2285
static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
2286
const struct snd_kcontrol_new *controls, int num_controls,
2287
const char *prefix, void *data)
2291
for (i = 0; i < num_controls; i++) {
2292
const struct snd_kcontrol_new *control = &controls[i];
2294
err = snd_ctl_add(card, snd_soc_cnew(control, data,
2295
control->name, prefix));
2297
dev_err(dev, "ASoC: Failed to add %s: %d\n",
2298
control->name, err);
2306
struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
2309
struct snd_card *card = soc_card->snd_card;
2310
struct snd_kcontrol *kctl;
2312
if (unlikely(!name))
2315
list_for_each_entry(kctl, &card->controls, list)
2316
if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
2320
EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
2323
* snd_soc_add_component_controls - Add an array of controls to a component.
2325
* @component: Component to add controls to
2326
* @controls: Array of controls to add
2327
* @num_controls: Number of elements in the array
2329
* Return: 0 for success, else error.
2331
int snd_soc_add_component_controls(struct snd_soc_component *component,
2332
const struct snd_kcontrol_new *controls, unsigned int num_controls)
2334
struct snd_card *card = component->card->snd_card;
2336
return snd_soc_add_controls(card, component->dev, controls,
2337
num_controls, component->name_prefix, component);
2339
EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
2342
* snd_soc_add_card_controls - add an array of controls to a SoC card.
2343
* Convenience function to add a list of controls.
2345
* @soc_card: SoC card to add controls to
2346
* @controls: array of controls to add
2347
* @num_controls: number of elements in the array
2349
* Return 0 for success, else error.
2351
int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2352
const struct snd_kcontrol_new *controls, int num_controls)
2354
struct snd_card *card = soc_card->snd_card;
2356
return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2359
EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2362
* snd_soc_add_dai_controls - add an array of controls to a DAI.
2363
* Convienience function to add a list of controls.
2365
* @dai: DAI to add controls to
2366
* @controls: array of controls to add
2367
* @num_controls: number of elements in the array
2369
* Return 0 for success, else error.
2371
int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2372
const struct snd_kcontrol_new *controls, int num_controls)
2374
struct snd_card *card = dai->component->card->snd_card;
2376
return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2379
EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2381
static int snd_soc_bind_card(struct snd_soc_card *card)
2383
struct snd_soc_pcm_runtime *rtd;
2386
ret = snd_soc_instantiate_card(card);
2390
/* deactivate pins to sleep state */
2391
for_each_card_rtds(card, rtd) {
2392
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2393
struct snd_soc_dai *codec_dai;
2396
for_each_rtd_codec_dai(rtd, j, codec_dai) {
2397
if (!codec_dai->active)
2398
pinctrl_pm_select_sleep_state(codec_dai->dev);
2401
if (!cpu_dai->active)
2402
pinctrl_pm_select_sleep_state(cpu_dai->dev);
2409
* snd_soc_register_card - Register a card with the ASoC core
2411
* @card: Card to register
2414
int snd_soc_register_card(struct snd_soc_card *card)
2416
if (!card->name || !card->dev)
2419
dev_set_drvdata(card->dev, card);
2421
INIT_LIST_HEAD(&card->widgets);
2422
INIT_LIST_HEAD(&card->paths);
2423
INIT_LIST_HEAD(&card->dapm_list);
2424
INIT_LIST_HEAD(&card->aux_comp_list);
2425
INIT_LIST_HEAD(&card->component_dev_list);
2426
INIT_LIST_HEAD(&card->list);
2427
INIT_LIST_HEAD(&card->dai_link_list);
2428
INIT_LIST_HEAD(&card->rtd_list);
2429
INIT_LIST_HEAD(&card->dapm_dirty);
2430
INIT_LIST_HEAD(&card->dobj_list);
2432
card->instantiated = 0;
2433
mutex_init(&card->mutex);
2434
mutex_init(&card->dapm_mutex);
2435
mutex_init(&card->pcm_mutex);
2436
spin_lock_init(&card->dpcm_lock);
2438
return snd_soc_bind_card(card);
2440
EXPORT_SYMBOL_GPL(snd_soc_register_card);
2442
static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
2444
if (card->instantiated) {
2445
card->instantiated = false;
2446
snd_soc_dapm_shutdown(card);
2447
snd_soc_flush_all_delayed_work(card);
2449
soc_cleanup_card_resources(card);
2451
list_add(&card->list, &unbind_card_list);
2454
list_del(&card->list);
2459
* snd_soc_unregister_card - Unregister a card with the ASoC core
2461
* @card: Card to unregister
2464
int snd_soc_unregister_card(struct snd_soc_card *card)
2466
mutex_lock(&client_mutex);
2467
snd_soc_unbind_card(card, true);
2468
mutex_unlock(&client_mutex);
2469
dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2473
EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2476
* Simplify DAI link configuration by removing ".-1" from device names
2477
* and sanitizing names.
2479
static char *fmt_single_name(struct device *dev, int *id)
2481
char *found, name[NAME_SIZE];
2484
if (dev_name(dev) == NULL)
2487
strlcpy(name, dev_name(dev), NAME_SIZE);
2489
/* are we a "%s.%d" name (platform and SPI components) */
2490
found = strstr(name, dev->driver->name);
2493
if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2495
/* discard ID from name if ID == -1 */
2497
found[strlen(dev->driver->name)] = '\0';
2501
/* I2C component devices are named "bus-addr" */
2502
if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2503
char tmp[NAME_SIZE];
2505
/* create unique ID number from I2C addr and bus */
2506
*id = ((id1 & 0xffff) << 16) + id2;
2508
/* sanitize component name for DAI link creation */
2509
snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
2511
strlcpy(name, tmp, NAME_SIZE);
2516
return devm_kstrdup(dev, name, GFP_KERNEL);
2520
* Simplify DAI link naming for single devices with multiple DAIs by removing
2521
* any ".-1" and using the DAI name (instead of device name).
2523
static inline char *fmt_multiple_name(struct device *dev,
2524
struct snd_soc_dai_driver *dai_drv)
2526
if (dai_drv->name == NULL) {
2528
"ASoC: error - multiple DAI %s registered with no name\n",
2533
return devm_kstrdup(dev, dai_drv->name, GFP_KERNEL);
2536
static void soc_del_dai(struct snd_soc_dai *dai)
2538
dev_dbg(dai->dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
2539
list_del(&dai->list);
2542
/* Create a DAI and add it to the component's DAI list */
2543
static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
2544
struct snd_soc_dai_driver *dai_drv,
2545
bool legacy_dai_naming)
2547
struct device *dev = component->dev;
2548
struct snd_soc_dai *dai;
2550
dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));
2552
dai = devm_kzalloc(dev, sizeof(*dai), GFP_KERNEL);
2557
* Back in the old days when we still had component-less DAIs,
2558
* instead of having a static name, component-less DAIs would
2559
* inherit the name of the parent device so it is possible to
2560
* register multiple instances of the DAI. We still need to keep
2561
* the same naming style even though those DAIs are not
2562
* component-less anymore.
2564
if (legacy_dai_naming &&
2565
(dai_drv->id == 0 || dai_drv->name == NULL)) {
2566
dai->name = fmt_single_name(dev, &dai->id);
2568
dai->name = fmt_multiple_name(dev, dai_drv);
2570
dai->id = dai_drv->id;
2572
dai->id = component->num_dai;
2577
dai->component = component;
2579
dai->driver = dai_drv;
2580
if (!dai->driver->ops)
2581
dai->driver->ops = &null_dai_ops;
2583
/* see for_each_component_dais */
2584
list_add_tail(&dai->list, &component->dai_list);
2585
component->num_dai++;
2587
dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2591
void snd_soc_unregister_dai(struct snd_soc_dai *dai)
2595
EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);
2598
* snd_soc_register_dai - Register a DAI dynamically & create its widgets
2600
* @component: The component the DAIs are registered for
2601
* @dai_drv: DAI driver to use for the DAI
2603
* Topology can use this API to register DAIs when probing a component.
2604
* These DAIs's widgets will be freed in the card cleanup and the DAIs
2605
* will be freed in the component cleanup.
2607
struct snd_soc_dai *snd_soc_register_dai(struct snd_soc_component *component,
2608
struct snd_soc_dai_driver *dai_drv,
2609
bool legacy_dai_naming)
2611
struct device *dev = component->dev;
2613
dev_dbg(dev, "ASoC: dai register %s\n", dai_drv->name);
2615
lockdep_assert_held(&client_mutex);
2616
return soc_add_dai(component, dai_drv, legacy_dai_naming);
2618
EXPORT_SYMBOL_GPL(snd_soc_register_dai);
2621
* snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2623
* @component: The component for which the DAIs should be unregistered
2625
static void snd_soc_unregister_dais(struct snd_soc_component *component)
2627
struct snd_soc_dai *dai, *_dai;
2629
for_each_component_dais_safe(component, dai, _dai)
2630
snd_soc_unregister_dai(dai);
2634
* snd_soc_register_dais - Register a DAI with the ASoC core
2636
* @component: The component the DAIs are registered for
2637
* @dai_drv: DAI driver to use for the DAIs
2638
* @count: Number of DAIs
2640
static int snd_soc_register_dais(struct snd_soc_component *component,
2641
struct snd_soc_dai_driver *dai_drv,
2644
struct snd_soc_dai *dai;
2648
for (i = 0; i < count; i++) {
2649
dai = snd_soc_register_dai(component, dai_drv + i, count == 1 &&
2650
!component->driver->non_legacy_dai_naming);
2660
snd_soc_unregister_dais(component);
2665
static int snd_soc_component_initialize(struct snd_soc_component *component,
2666
const struct snd_soc_component_driver *driver, struct device *dev)
2668
INIT_LIST_HEAD(&component->dai_list);
2669
INIT_LIST_HEAD(&component->dobj_list);
2670
INIT_LIST_HEAD(&component->card_list);
2671
mutex_init(&component->io_mutex);
2673
component->name = fmt_single_name(dev, &component->id);
2674
if (!component->name) {
2675
dev_err(dev, "ASoC: Failed to allocate name\n");
2679
component->dev = dev;
2680
component->driver = driver;
2685
static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2687
int val_bytes = regmap_get_val_bytes(component->regmap);
2689
/* Errors are legitimate for non-integer byte multiples */
2691
component->val_bytes = val_bytes;
2694
#ifdef CONFIG_REGMAP
2697
* snd_soc_component_init_regmap() - Initialize regmap instance for the
2699
* @component: The component for which to initialize the regmap instance
2700
* @regmap: The regmap instance that should be used by the component
2702
* This function allows deferred assignment of the regmap instance that is
2703
* associated with the component. Only use this if the regmap instance is not
2704
* yet ready when the component is registered. The function must also be called
2705
* before the first IO attempt of the component.
2707
void snd_soc_component_init_regmap(struct snd_soc_component *component,
2708
struct regmap *regmap)
2710
component->regmap = regmap;
2711
snd_soc_component_setup_regmap(component);
2713
EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2716
* snd_soc_component_exit_regmap() - De-initialize regmap instance for the
2718
* @component: The component for which to de-initialize the regmap instance
2720
* Calls regmap_exit() on the regmap instance associated to the component and
2721
* removes the regmap instance from the component.
2723
* This function should only be used if snd_soc_component_init_regmap() was used
2724
* to initialize the regmap instance.
2726
void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2728
regmap_exit(component->regmap);
2729
component->regmap = NULL;
2731
EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2735
#define ENDIANNESS_MAP(name) \
2736
(SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
2737
static u64 endianness_format_map[] = {
2738
ENDIANNESS_MAP(S16_),
2739
ENDIANNESS_MAP(U16_),
2740
ENDIANNESS_MAP(S24_),
2741
ENDIANNESS_MAP(U24_),
2742
ENDIANNESS_MAP(S32_),
2743
ENDIANNESS_MAP(U32_),
2744
ENDIANNESS_MAP(S24_3),
2745
ENDIANNESS_MAP(U24_3),
2746
ENDIANNESS_MAP(S20_3),
2747
ENDIANNESS_MAP(U20_3),
2748
ENDIANNESS_MAP(S18_3),
2749
ENDIANNESS_MAP(U18_3),
2750
ENDIANNESS_MAP(FLOAT_),
2751
ENDIANNESS_MAP(FLOAT64_),
2752
ENDIANNESS_MAP(IEC958_SUBFRAME_),
2756
* Fix up the DAI formats for endianness: codecs don't actually see
2757
* the endianness of the data but we're using the CPU format
2758
* definitions which do need to include endianness so we ensure that
2759
* codec DAIs always have both big and little endian variants set.
2761
static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
2765
for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
2766
if (stream->formats & endianness_format_map[i])
2767
stream->formats |= endianness_format_map[i];
2770
static void snd_soc_try_rebind_card(void)
2772
struct snd_soc_card *card, *c;
2774
list_for_each_entry_safe(card, c, &unbind_card_list, list)
2775
if (!snd_soc_bind_card(card))
2776
list_del(&card->list);
2779
static void snd_soc_del_component_unlocked(struct snd_soc_component *component)
2781
struct snd_soc_card *card = component->card;
2783
snd_soc_unregister_dais(component);
2786
snd_soc_unbind_card(card, false);
2788
list_del(&component->list);
2791
int snd_soc_add_component(struct device *dev,
2792
struct snd_soc_component *component,
2793
const struct snd_soc_component_driver *component_driver,
2794
struct snd_soc_dai_driver *dai_drv,
2800
mutex_lock(&client_mutex);
2802
ret = snd_soc_component_initialize(component, component_driver, dev);
2806
if (component_driver->endianness) {
2807
for (i = 0; i < num_dai; i++) {
2808
convert_endianness_formats(&dai_drv[i].playback);
2809
convert_endianness_formats(&dai_drv[i].capture);
2813
ret = snd_soc_register_dais(component, dai_drv, num_dai);
2815
dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2819
if (!component->driver->write && !component->driver->read) {
2820
if (!component->regmap)
2821
component->regmap = dev_get_regmap(component->dev,
2823
if (component->regmap)
2824
snd_soc_component_setup_regmap(component);
2827
/* see for_each_component */
2828
list_add(&component->list, &component_list);
2832
snd_soc_del_component_unlocked(component);
2834
mutex_unlock(&client_mutex);
2837
snd_soc_try_rebind_card();
2841
EXPORT_SYMBOL_GPL(snd_soc_add_component);
2843
int snd_soc_register_component(struct device *dev,
2844
const struct snd_soc_component_driver *component_driver,
2845
struct snd_soc_dai_driver *dai_drv,
2848
struct snd_soc_component *component;
2850
component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2854
return snd_soc_add_component(dev, component, component_driver,
2857
EXPORT_SYMBOL_GPL(snd_soc_register_component);
2860
* snd_soc_unregister_component - Unregister all related component
2861
* from the ASoC core
2863
* @dev: The device to unregister
2865
void snd_soc_unregister_component(struct device *dev)
2867
struct snd_soc_component *component;
2869
mutex_lock(&client_mutex);
2871
component = snd_soc_lookup_component_nolocked(dev, NULL);
2875
snd_soc_del_component_unlocked(component);
2877
mutex_unlock(&client_mutex);
2879
EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2881
/* Retrieve a card's name from device tree */
2882
int snd_soc_of_parse_card_name(struct snd_soc_card *card,
2883
const char *propname)
2885
struct device_node *np;
2889
pr_err("card->dev is not set before calling %s\n", __func__);
2893
np = card->dev->of_node;
2895
ret = of_property_read_string_index(np, propname, 0, &card->name);
2897
* EINVAL means the property does not exist. This is fine providing
2898
* card->name was previously set, which is checked later in
2899
* snd_soc_register_card.
2901
if (ret < 0 && ret != -EINVAL) {
2903
"ASoC: Property '%s' could not be read: %d\n",
2910
EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2912
static const struct snd_soc_dapm_widget simple_widgets[] = {
2913
SND_SOC_DAPM_MIC("Microphone", NULL),
2914
SND_SOC_DAPM_LINE("Line", NULL),
2915
SND_SOC_DAPM_HP("Headphone", NULL),
2916
SND_SOC_DAPM_SPK("Speaker", NULL),
2919
int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
2920
const char *propname)
2922
struct device_node *np = card->dev->of_node;
2923
struct snd_soc_dapm_widget *widgets;
2924
const char *template, *wname;
2925
int i, j, num_widgets, ret;
2927
num_widgets = of_property_count_strings(np, propname);
2928
if (num_widgets < 0) {
2930
"ASoC: Property '%s' does not exist\n", propname);
2933
if (num_widgets & 1) {
2935
"ASoC: Property '%s' length is not even\n", propname);
2941
dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
2946
widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
2950
"ASoC: Could not allocate memory for widgets\n");
2954
for (i = 0; i < num_widgets; i++) {
2955
ret = of_property_read_string_index(np, propname,
2959
"ASoC: Property '%s' index %d read error:%d\n",
2960
propname, 2 * i, ret);
2964
for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
2965
if (!strncmp(template, simple_widgets[j].name,
2966
strlen(simple_widgets[j].name))) {
2967
widgets[i] = simple_widgets[j];
2972
if (j >= ARRAY_SIZE(simple_widgets)) {
2974
"ASoC: DAPM widget '%s' is not supported\n",
2979
ret = of_property_read_string_index(np, propname,
2984
"ASoC: Property '%s' index %d read error:%d\n",
2985
propname, (2 * i) + 1, ret);
2989
widgets[i].name = wname;
2992
card->of_dapm_widgets = widgets;
2993
card->num_of_dapm_widgets = num_widgets;
2997
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
2999
int snd_soc_of_get_slot_mask(struct device_node *np,
3000
const char *prop_name,
3004
const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3010
for (i = 0; i < val; i++)
3011
if (be32_to_cpup(&of_slot_mask[i]))
3016
EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3018
int snd_soc_of_parse_tdm_slot(struct device_node *np,
3019
unsigned int *tx_mask,
3020
unsigned int *rx_mask,
3021
unsigned int *slots,
3022
unsigned int *slot_width)
3028
snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
3030
snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);
3032
if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3033
ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3041
if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3042
ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3052
EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3054
void snd_soc_of_parse_node_prefix(struct device_node *np,
3055
struct snd_soc_codec_conf *codec_conf,
3056
struct device_node *of_node,
3057
const char *propname)
3062
ret = of_property_read_string(np, propname, &str);
3064
/* no prefix is not error */
3068
codec_conf->of_node = of_node;
3069
codec_conf->name_prefix = str;
3071
EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3073
int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3074
const char *propname)
3076
struct device_node *np = card->dev->of_node;
3078
struct snd_soc_dapm_route *routes;
3081
num_routes = of_property_count_strings(np, propname);
3082
if (num_routes < 0 || num_routes & 1) {
3084
"ASoC: Property '%s' does not exist or its length is not even\n",
3090
dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3095
routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3099
"ASoC: Could not allocate DAPM route table\n");
3103
for (i = 0; i < num_routes; i++) {
3104
ret = of_property_read_string_index(np, propname,
3105
2 * i, &routes[i].sink);
3108
"ASoC: Property '%s' index %d could not be read: %d\n",
3109
propname, 2 * i, ret);
3112
ret = of_property_read_string_index(np, propname,
3113
(2 * i) + 1, &routes[i].source);
3116
"ASoC: Property '%s' index %d could not be read: %d\n",
3117
propname, (2 * i) + 1, ret);
3122
card->num_of_dapm_routes = num_routes;
3123
card->of_dapm_routes = routes;
3127
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3129
unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3131
struct device_node **bitclkmaster,
3132
struct device_node **framemaster)
3136
unsigned int format = 0;
3142
} of_fmt_table[] = {
3143
{ "i2s", SND_SOC_DAIFMT_I2S },
3144
{ "right_j", SND_SOC_DAIFMT_RIGHT_J },
3145
{ "left_j", SND_SOC_DAIFMT_LEFT_J },
3146
{ "dsp_a", SND_SOC_DAIFMT_DSP_A },
3147
{ "dsp_b", SND_SOC_DAIFMT_DSP_B },
3148
{ "ac97", SND_SOC_DAIFMT_AC97 },
3149
{ "pdm", SND_SOC_DAIFMT_PDM},
3150
{ "msb", SND_SOC_DAIFMT_MSB },
3151
{ "lsb", SND_SOC_DAIFMT_LSB },
3158
* check "dai-format = xxx"
3159
* or "[prefix]format = xxx"
3160
* SND_SOC_DAIFMT_FORMAT_MASK area
3162
ret = of_property_read_string(np, "dai-format", &str);
3164
snprintf(prop, sizeof(prop), "%sformat", prefix);
3165
ret = of_property_read_string(np, prop, &str);
3168
for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3169
if (strcmp(str, of_fmt_table[i].name) == 0) {
3170
format |= of_fmt_table[i].val;
3177
* check "[prefix]continuous-clock"
3178
* SND_SOC_DAIFMT_CLOCK_MASK area
3180
snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3181
if (of_property_read_bool(np, prop))
3182
format |= SND_SOC_DAIFMT_CONT;
3184
format |= SND_SOC_DAIFMT_GATED;
3187
* check "[prefix]bitclock-inversion"
3188
* check "[prefix]frame-inversion"
3189
* SND_SOC_DAIFMT_INV_MASK area
3191
snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3192
bit = !!of_get_property(np, prop, NULL);
3194
snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3195
frame = !!of_get_property(np, prop, NULL);
3197
switch ((bit << 4) + frame) {
3199
format |= SND_SOC_DAIFMT_IB_IF;
3202
format |= SND_SOC_DAIFMT_IB_NF;
3205
format |= SND_SOC_DAIFMT_NB_IF;
3208
/* SND_SOC_DAIFMT_NB_NF is default */
3213
* check "[prefix]bitclock-master"
3214
* check "[prefix]frame-master"
3215
* SND_SOC_DAIFMT_MASTER_MASK area
3217
snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3218
bit = !!of_get_property(np, prop, NULL);
3219
if (bit && bitclkmaster)
3220
*bitclkmaster = of_parse_phandle(np, prop, 0);
3222
snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3223
frame = !!of_get_property(np, prop, NULL);
3224
if (frame && framemaster)
3225
*framemaster = of_parse_phandle(np, prop, 0);
3227
switch ((bit << 4) + frame) {
3229
format |= SND_SOC_DAIFMT_CBM_CFM;
3232
format |= SND_SOC_DAIFMT_CBM_CFS;
3235
format |= SND_SOC_DAIFMT_CBS_CFM;
3238
format |= SND_SOC_DAIFMT_CBS_CFS;
3244
EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3246
int snd_soc_get_dai_id(struct device_node *ep)
3248
struct snd_soc_component *component;
3249
struct snd_soc_dai_link_component dlc;
3252
dlc.of_node = of_graph_get_port_parent(ep);
3255
* For example HDMI case, HDMI has video/sound port,
3256
* but ALSA SoC needs sound port number only.
3257
* Thus counting HDMI DT port/endpoint doesn't work.
3258
* Then, it should have .of_xlate_dai_id
3261
mutex_lock(&client_mutex);
3262
component = soc_find_component(&dlc);
3264
ret = snd_soc_component_of_xlate_dai_id(component, ep);
3265
mutex_unlock(&client_mutex);
3267
of_node_put(dlc.of_node);
3271
EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
3273
int snd_soc_get_dai_name(struct of_phandle_args *args,
3274
const char **dai_name)
3276
struct snd_soc_component *pos;
3277
struct device_node *component_of_node;
3278
int ret = -EPROBE_DEFER;
3280
mutex_lock(&client_mutex);
3281
for_each_component(pos) {
3282
component_of_node = soc_component_to_node(pos);
3284
if (component_of_node != args->np)
3287
ret = snd_soc_component_of_xlate_dai_name(pos, args, dai_name);
3288
if (ret == -ENOTSUPP) {
3289
struct snd_soc_dai *dai;
3292
switch (args->args_count) {
3294
id = 0; /* same as dai_drv[0] */
3304
if (id < 0 || id >= pos->num_dai) {
3311
/* find target DAI */
3312
for_each_component_dais(pos, dai) {
3318
*dai_name = dai->driver->name;
3320
*dai_name = pos->name;
3325
mutex_unlock(&client_mutex);
3328
EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3330
int snd_soc_of_get_dai_name(struct device_node *of_node,
3331
const char **dai_name)
3333
struct of_phandle_args args;
3336
ret = of_parse_phandle_with_args(of_node, "sound-dai",
3337
"#sound-dai-cells", 0, &args);
3341
ret = snd_soc_get_dai_name(&args, dai_name);
3343
of_node_put(args.np);
3347
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3350
* snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
3351
* @dai_link: DAI link
3353
* Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
3355
void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
3357
struct snd_soc_dai_link_component *component;
3360
for_each_link_codecs(dai_link, index, component) {
3361
if (!component->of_node)
3363
of_node_put(component->of_node);
3364
component->of_node = NULL;
3367
EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);
3370
* snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3372
* @of_node: Device node
3373
* @dai_link: DAI link
3375
* Builds an array of CODEC DAI components from the DAI link property
3377
* The array is set in the DAI link and the number of DAIs is set accordingly.
3378
* The device nodes in the array (of_node) must be dereferenced by calling
3379
* snd_soc_of_put_dai_link_codecs() on @dai_link.
3381
* Returns 0 for success
3383
int snd_soc_of_get_dai_link_codecs(struct device *dev,
3384
struct device_node *of_node,
3385
struct snd_soc_dai_link *dai_link)
3387
struct of_phandle_args args;
3388
struct snd_soc_dai_link_component *component;
3390
int index, num_codecs, ret;
3392
/* Count the number of CODECs */
3394
num_codecs = of_count_phandle_with_args(of_node, name,
3395
"#sound-dai-cells");
3396
if (num_codecs <= 0) {
3397
if (num_codecs == -ENOENT)
3398
dev_err(dev, "No 'sound-dai' property\n");
3400
dev_err(dev, "Bad phandle in 'sound-dai'\n");
3403
component = devm_kcalloc(dev,
3404
num_codecs, sizeof(*component),
3408
dai_link->codecs = component;
3409
dai_link->num_codecs = num_codecs;
3411
/* Parse the list */
3412
for_each_link_codecs(dai_link, index, component) {
3413
ret = of_parse_phandle_with_args(of_node, name,
3418
component->of_node = args.np;
3419
ret = snd_soc_get_dai_name(&args, &component->dai_name);
3425
snd_soc_of_put_dai_link_codecs(dai_link);
3426
dai_link->codecs = NULL;
3427
dai_link->num_codecs = 0;
3430
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3432
static int __init snd_soc_init(void)
3434
snd_soc_debugfs_init();
3435
snd_soc_util_init();
3437
return platform_driver_register(&soc_driver);
3439
module_init(snd_soc_init);
3441
static void __exit snd_soc_exit(void)
3443
snd_soc_util_exit();
3444
snd_soc_debugfs_exit();
3446
platform_driver_unregister(&soc_driver);
3448
module_exit(snd_soc_exit);
3450
/* Module information */
3451
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3452
MODULE_DESCRIPTION("ALSA SoC Core");
3453
MODULE_LICENSE("GPL");
3454
MODULE_ALIAS("platform:soc-audio");
added
removed
buildroot/src/oem-audiosdw-lp1836324-0.6ubuntu1.2/soc/soc-core.c
