diff options
Diffstat (limited to 'sound/soc/soc-dapm.c')
| -rw-r--r-- | sound/soc/soc-dapm.c | 4637 |
1 files changed, 4637 insertions, 0 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c new file mode 100644 index 000000000..4d70e6bc2 --- /dev/null +++ b/sound/soc/soc-dapm.c @@ -0,0 +1,4637 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// soc-dapm.c -- ALSA SoC Dynamic Audio Power Management +// +// Copyright 2005 Wolfson Microelectronics PLC. +// Author: Liam Girdwood <lrg@slimlogic.co.uk> +// +// Features: +// o Changes power status of internal codec blocks depending on the +// dynamic configuration of codec internal audio paths and active +// DACs/ADCs. +// o Platform power domain - can support external components i.e. amps and +// mic/headphone insertion events. +// o Automatic Mic Bias support +// o Jack insertion power event initiation - e.g. hp insertion will enable +// sinks, dacs, etc +// o Delayed power down of audio subsystem to reduce pops between a quick +// device reopen. + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/async.h> +#include <linux/delay.h> +#include <linux/pm.h> +#include <linux/bitops.h> +#include <linux/platform_device.h> +#include <linux/jiffies.h> +#include <linux/debugfs.h> +#include <linux/pm_runtime.h> +#include <linux/regulator/consumer.h> +#include <linux/pinctrl/consumer.h> +#include <linux/clk.h> +#include <linux/slab.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/initval.h> + +#include <trace/events/asoc.h> + +#define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++; + +#define SND_SOC_DAPM_DIR_REVERSE(x) ((x == SND_SOC_DAPM_DIR_IN) ? \ + SND_SOC_DAPM_DIR_OUT : SND_SOC_DAPM_DIR_IN) + +#define snd_soc_dapm_for_each_direction(dir) \ + for ((dir) = SND_SOC_DAPM_DIR_IN; (dir) <= SND_SOC_DAPM_DIR_OUT; \ + (dir)++) + +static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm, + struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink, + const char *control, + int (*connected)(struct snd_soc_dapm_widget *source, + struct snd_soc_dapm_widget *sink)); + +struct snd_soc_dapm_widget * +snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_widget *widget); + +struct snd_soc_dapm_widget * +snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_widget *widget); + +/* dapm power sequences - make this per codec in the future */ +static int dapm_up_seq[] = { + [snd_soc_dapm_pre] = 0, + [snd_soc_dapm_regulator_supply] = 1, + [snd_soc_dapm_pinctrl] = 1, + [snd_soc_dapm_clock_supply] = 1, + [snd_soc_dapm_supply] = 2, + [snd_soc_dapm_micbias] = 3, + [snd_soc_dapm_vmid] = 3, + [snd_soc_dapm_dai_link] = 2, + [snd_soc_dapm_dai_in] = 4, + [snd_soc_dapm_dai_out] = 4, + [snd_soc_dapm_aif_in] = 4, + [snd_soc_dapm_aif_out] = 4, + [snd_soc_dapm_mic] = 5, + [snd_soc_dapm_siggen] = 5, + [snd_soc_dapm_input] = 5, + [snd_soc_dapm_output] = 5, + [snd_soc_dapm_mux] = 6, + [snd_soc_dapm_demux] = 6, + [snd_soc_dapm_dac] = 7, + [snd_soc_dapm_switch] = 8, + [snd_soc_dapm_mixer] = 8, + [snd_soc_dapm_mixer_named_ctl] = 8, + [snd_soc_dapm_pga] = 9, + [snd_soc_dapm_buffer] = 9, + [snd_soc_dapm_scheduler] = 9, + [snd_soc_dapm_effect] = 9, + [snd_soc_dapm_src] = 9, + [snd_soc_dapm_asrc] = 9, + [snd_soc_dapm_encoder] = 9, + [snd_soc_dapm_decoder] = 9, + [snd_soc_dapm_adc] = 10, + [snd_soc_dapm_out_drv] = 11, + [snd_soc_dapm_hp] = 11, + [snd_soc_dapm_spk] = 11, + [snd_soc_dapm_line] = 11, + [snd_soc_dapm_sink] = 11, + [snd_soc_dapm_kcontrol] = 12, + [snd_soc_dapm_post] = 13, +}; + +static int dapm_down_seq[] = { + [snd_soc_dapm_pre] = 0, + [snd_soc_dapm_kcontrol] = 1, + [snd_soc_dapm_adc] = 2, + [snd_soc_dapm_hp] = 3, + [snd_soc_dapm_spk] = 3, + [snd_soc_dapm_line] = 3, + [snd_soc_dapm_out_drv] = 3, + [snd_soc_dapm_sink] = 3, + [snd_soc_dapm_pga] = 4, + [snd_soc_dapm_buffer] = 4, + [snd_soc_dapm_scheduler] = 4, + [snd_soc_dapm_effect] = 4, + [snd_soc_dapm_src] = 4, + [snd_soc_dapm_asrc] = 4, + [snd_soc_dapm_encoder] = 4, + [snd_soc_dapm_decoder] = 4, + [snd_soc_dapm_switch] = 5, + [snd_soc_dapm_mixer_named_ctl] = 5, + [snd_soc_dapm_mixer] = 5, + [snd_soc_dapm_dac] = 6, + [snd_soc_dapm_mic] = 7, + [snd_soc_dapm_siggen] = 7, + [snd_soc_dapm_input] = 7, + [snd_soc_dapm_output] = 7, + [snd_soc_dapm_micbias] = 8, + [snd_soc_dapm_vmid] = 8, + [snd_soc_dapm_mux] = 9, + [snd_soc_dapm_demux] = 9, + [snd_soc_dapm_aif_in] = 10, + [snd_soc_dapm_aif_out] = 10, + [snd_soc_dapm_dai_in] = 10, + [snd_soc_dapm_dai_out] = 10, + [snd_soc_dapm_dai_link] = 11, + [snd_soc_dapm_supply] = 12, + [snd_soc_dapm_clock_supply] = 13, + [snd_soc_dapm_pinctrl] = 13, + [snd_soc_dapm_regulator_supply] = 13, + [snd_soc_dapm_post] = 14, +}; + +static void dapm_assert_locked(struct snd_soc_dapm_context *dapm) +{ + if (dapm->card && dapm->card->instantiated) + lockdep_assert_held(&dapm->card->dapm_mutex); +} + +static void pop_wait(u32 pop_time) +{ + if (pop_time) + schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time)); +} + +static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...) +{ + va_list args; + char *buf; + + if (!pop_time) + return; + + buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + if (buf == NULL) + return; + + va_start(args, fmt); + vsnprintf(buf, PAGE_SIZE, fmt, args); + dev_info(dev, "%s", buf); + va_end(args); + + kfree(buf); +} + +static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w) +{ + return !list_empty(&w->dirty); +} + +static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason) +{ + dapm_assert_locked(w->dapm); + + if (!dapm_dirty_widget(w)) { + dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n", + w->name, reason); + list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty); + } +} + +/* + * Common implementation for dapm_widget_invalidate_input_paths() and + * dapm_widget_invalidate_output_paths(). The function is inlined since the + * combined size of the two specialized functions is only marginally larger then + * the size of the generic function and at the same time the fast path of the + * specialized functions is significantly smaller than the generic function. + */ +static __always_inline void dapm_widget_invalidate_paths( + struct snd_soc_dapm_widget *w, enum snd_soc_dapm_direction dir) +{ + enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir); + struct snd_soc_dapm_widget *node; + struct snd_soc_dapm_path *p; + LIST_HEAD(list); + + dapm_assert_locked(w->dapm); + + if (w->endpoints[dir] == -1) + return; + + list_add_tail(&w->work_list, &list); + w->endpoints[dir] = -1; + + list_for_each_entry(w, &list, work_list) { + snd_soc_dapm_widget_for_each_path(w, dir, p) { + if (p->is_supply || p->weak || !p->connect) + continue; + node = p->node[rdir]; + if (node->endpoints[dir] != -1) { + node->endpoints[dir] = -1; + list_add_tail(&node->work_list, &list); + } + } + } +} + +/* + * dapm_widget_invalidate_input_paths() - Invalidate the cached number of + * input paths + * @w: The widget for which to invalidate the cached number of input paths + * + * Resets the cached number of inputs for the specified widget and all widgets + * that can be reached via outcoming paths from the widget. + * + * This function must be called if the number of output paths for a widget might + * have changed. E.g. if the source state of a widget changes or a path is added + * or activated with the widget as the sink. + */ +static void dapm_widget_invalidate_input_paths(struct snd_soc_dapm_widget *w) +{ + dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_IN); +} + +/* + * dapm_widget_invalidate_output_paths() - Invalidate the cached number of + * output paths + * @w: The widget for which to invalidate the cached number of output paths + * + * Resets the cached number of outputs for the specified widget and all widgets + * that can be reached via incoming paths from the widget. + * + * This function must be called if the number of output paths for a widget might + * have changed. E.g. if the sink state of a widget changes or a path is added + * or activated with the widget as the source. + */ +static void dapm_widget_invalidate_output_paths(struct snd_soc_dapm_widget *w) +{ + dapm_widget_invalidate_paths(w, SND_SOC_DAPM_DIR_OUT); +} + +/* + * dapm_path_invalidate() - Invalidates the cached number of inputs and outputs + * for the widgets connected to a path + * @p: The path to invalidate + * + * Resets the cached number of inputs for the sink of the path and the cached + * number of outputs for the source of the path. + * + * This function must be called when a path is added, removed or the connected + * state changes. + */ +static void dapm_path_invalidate(struct snd_soc_dapm_path *p) +{ + /* + * Weak paths or supply paths do not influence the number of input or + * output paths of their neighbors. + */ + if (p->weak || p->is_supply) + return; + + /* + * The number of connected endpoints is the sum of the number of + * connected endpoints of all neighbors. If a node with 0 connected + * endpoints is either connected or disconnected that sum won't change, + * so there is no need to re-check the path. + */ + if (p->source->endpoints[SND_SOC_DAPM_DIR_IN] != 0) + dapm_widget_invalidate_input_paths(p->sink); + if (p->sink->endpoints[SND_SOC_DAPM_DIR_OUT] != 0) + dapm_widget_invalidate_output_paths(p->source); +} + +void dapm_mark_endpoints_dirty(struct snd_soc_card *card) +{ + struct snd_soc_dapm_widget *w; + + mutex_lock(&card->dapm_mutex); + + list_for_each_entry(w, &card->widgets, list) { + if (w->is_ep) { + dapm_mark_dirty(w, "Rechecking endpoints"); + if (w->is_ep & SND_SOC_DAPM_EP_SINK) + dapm_widget_invalidate_output_paths(w); + if (w->is_ep & SND_SOC_DAPM_EP_SOURCE) + dapm_widget_invalidate_input_paths(w); + } + } + + mutex_unlock(&card->dapm_mutex); +} +EXPORT_SYMBOL_GPL(dapm_mark_endpoints_dirty); + +/* create a new dapm widget */ +static inline struct snd_soc_dapm_widget *dapm_cnew_widget( + const struct snd_soc_dapm_widget *_widget) +{ + return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL); +} + +struct dapm_kcontrol_data { + unsigned int value; + struct snd_soc_dapm_widget *widget; + struct list_head paths; + struct snd_soc_dapm_widget_list *wlist; +}; + +static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget, + struct snd_kcontrol *kcontrol, const char *ctrl_name) +{ + struct dapm_kcontrol_data *data; + struct soc_mixer_control *mc; + struct soc_enum *e; + const char *name; + int ret; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + INIT_LIST_HEAD(&data->paths); + + switch (widget->id) { + case snd_soc_dapm_switch: + case snd_soc_dapm_mixer: + case snd_soc_dapm_mixer_named_ctl: + mc = (struct soc_mixer_control *)kcontrol->private_value; + + if (mc->autodisable && snd_soc_volsw_is_stereo(mc)) + dev_warn(widget->dapm->dev, + "ASoC: Unsupported stereo autodisable control '%s'\n", + ctrl_name); + + if (mc->autodisable) { + struct snd_soc_dapm_widget template; + + name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name, + "Autodisable"); + if (!name) { + ret = -ENOMEM; + goto err_data; + } + + memset(&template, 0, sizeof(template)); + template.reg = mc->reg; + template.mask = (1 << fls(mc->max)) - 1; + template.shift = mc->shift; + if (mc->invert) + template.off_val = mc->max; + else + template.off_val = 0; + template.on_val = template.off_val; + template.id = snd_soc_dapm_kcontrol; + template.name = name; + + data->value = template.on_val; + + data->widget = + snd_soc_dapm_new_control_unlocked(widget->dapm, + &template); + kfree(name); + if (IS_ERR(data->widget)) { + ret = PTR_ERR(data->widget); + goto err_data; + } + if (!data->widget) { + ret = -ENOMEM; + goto err_data; + } + } + break; + case snd_soc_dapm_demux: + case snd_soc_dapm_mux: + e = (struct soc_enum *)kcontrol->private_value; + + if (e->autodisable) { + struct snd_soc_dapm_widget template; + + name = kasprintf(GFP_KERNEL, "%s %s", ctrl_name, + "Autodisable"); + if (!name) { + ret = -ENOMEM; + goto err_data; + } + + memset(&template, 0, sizeof(template)); + template.reg = e->reg; + template.mask = e->mask; + template.shift = e->shift_l; + template.off_val = snd_soc_enum_item_to_val(e, 0); + template.on_val = template.off_val; + template.id = snd_soc_dapm_kcontrol; + template.name = name; + + data->value = template.on_val; + + data->widget = snd_soc_dapm_new_control_unlocked( + widget->dapm, &template); + kfree(name); + if (IS_ERR(data->widget)) { + ret = PTR_ERR(data->widget); + goto err_data; + } + if (!data->widget) { + ret = -ENOMEM; + goto err_data; + } + + snd_soc_dapm_add_path(widget->dapm, data->widget, + widget, NULL, NULL); + } + break; + default: + break; + } + + kcontrol->private_data = data; + + return 0; + +err_data: + kfree(data); + return ret; +} + +static void dapm_kcontrol_free(struct snd_kcontrol *kctl) +{ + struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl); + + list_del(&data->paths); + kfree(data->wlist); + kfree(data); +} + +static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist( + const struct snd_kcontrol *kcontrol) +{ + struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol); + + return data->wlist; +} + +static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol, + struct snd_soc_dapm_widget *widget) +{ + struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol); + struct snd_soc_dapm_widget_list *new_wlist; + unsigned int n; + + if (data->wlist) + n = data->wlist->num_widgets + 1; + else + n = 1; + + new_wlist = krealloc(data->wlist, + sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL); + if (!new_wlist) + return -ENOMEM; + + new_wlist->widgets[n - 1] = widget; + new_wlist->num_widgets = n; + + data->wlist = new_wlist; + + return 0; +} + +static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol, + struct snd_soc_dapm_path *path) +{ + struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol); + + list_add_tail(&path->list_kcontrol, &data->paths); +} + +static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol) +{ + struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol); + + if (!data->widget) + return true; + + return data->widget->power; +} + +static struct list_head *dapm_kcontrol_get_path_list( + const struct snd_kcontrol *kcontrol) +{ + struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol); + + return &data->paths; +} + +#define dapm_kcontrol_for_each_path(path, kcontrol) \ + list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \ + list_kcontrol) + +unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol) +{ + struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol); + + return data->value; +} +EXPORT_SYMBOL_GPL(dapm_kcontrol_get_value); + +static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol, + unsigned int value) +{ + struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol); + + if (data->value == value) + return false; + + if (data->widget) { + switch (dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->id) { + case snd_soc_dapm_switch: + case snd_soc_dapm_mixer: + case snd_soc_dapm_mixer_named_ctl: + data->widget->on_val = value & data->widget->mask; + break; + case snd_soc_dapm_demux: + case snd_soc_dapm_mux: + data->widget->on_val = value >> data->widget->shift; + break; + default: + data->widget->on_val = value; + break; + } + } + + data->value = value; + + return true; +} + +/** + * snd_soc_dapm_kcontrol_widget() - Returns the widget associated to a + * kcontrol + * @kcontrol: The kcontrol + */ +struct snd_soc_dapm_widget *snd_soc_dapm_kcontrol_widget( + struct snd_kcontrol *kcontrol) +{ + return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_widget); + +/** + * snd_soc_dapm_kcontrol_dapm() - Returns the dapm context associated to a + * kcontrol + * @kcontrol: The kcontrol + * + * Note: This function must only be used on kcontrols that are known to have + * been registered for a CODEC. Otherwise the behaviour is undefined. + */ +struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm( + struct snd_kcontrol *kcontrol) +{ + return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->dapm; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm); + +static void dapm_reset(struct snd_soc_card *card) +{ + struct snd_soc_dapm_widget *w; + + lockdep_assert_held(&card->dapm_mutex); + + memset(&card->dapm_stats, 0, sizeof(card->dapm_stats)); + + list_for_each_entry(w, &card->widgets, list) { + w->new_power = w->power; + w->power_checked = false; + } +} + +static const char *soc_dapm_prefix(struct snd_soc_dapm_context *dapm) +{ + if (!dapm->component) + return NULL; + return dapm->component->name_prefix; +} + +static int soc_dapm_read(struct snd_soc_dapm_context *dapm, int reg, + unsigned int *value) +{ + if (!dapm->component) + return -EIO; + return snd_soc_component_read(dapm->component, reg, value); +} + +static int soc_dapm_update_bits(struct snd_soc_dapm_context *dapm, + int reg, unsigned int mask, unsigned int value) +{ + if (!dapm->component) + return -EIO; + return snd_soc_component_update_bits(dapm->component, reg, + mask, value); +} + +static int soc_dapm_test_bits(struct snd_soc_dapm_context *dapm, + int reg, unsigned int mask, unsigned int value) +{ + if (!dapm->component) + return -EIO; + return snd_soc_component_test_bits(dapm->component, reg, mask, value); +} + +static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm) +{ + if (dapm->component) + snd_soc_component_async_complete(dapm->component); +} + +static struct snd_soc_dapm_widget * +dapm_wcache_lookup(struct snd_soc_dapm_wcache *wcache, const char *name) +{ + struct snd_soc_dapm_widget *w = wcache->widget; + struct list_head *wlist; + const int depth = 2; + int i = 0; + + if (w) { + wlist = &w->dapm->card->widgets; + + list_for_each_entry_from(w, wlist, list) { + if (!strcmp(name, w->name)) + return w; + + if (++i == depth) + break; + } + } + + return NULL; +} + +static inline void dapm_wcache_update(struct snd_soc_dapm_wcache *wcache, + struct snd_soc_dapm_widget *w) +{ + wcache->widget = w; +} + +/** + * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level + * @dapm: The DAPM context for which to set the level + * @level: The level to set + * + * Forces the DAPM bias level to a specific state. It will call the bias level + * callback of DAPM context with the specified level. This will even happen if + * the context is already at the same level. Furthermore it will not go through + * the normal bias level sequencing, meaning any intermediate states between the + * current and the target state will not be entered. + * + * Note that the change in bias level is only temporary and the next time + * snd_soc_dapm_sync() is called the state will be set to the level as + * determined by the DAPM core. The function is mainly intended to be used to + * used during probe or resume from suspend to power up the device so + * initialization can be done, before the DAPM core takes over. + */ +int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm, + enum snd_soc_bias_level level) +{ + int ret = 0; + + if (dapm->set_bias_level) + ret = dapm->set_bias_level(dapm, level); + + if (ret == 0) + dapm->bias_level = level; + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level); + +/** + * snd_soc_dapm_set_bias_level - set the bias level for the system + * @dapm: DAPM context + * @level: level to configure + * + * Configure the bias (power) levels for the SoC audio device. + * + * Returns 0 for success else error. + */ +static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm, + enum snd_soc_bias_level level) +{ + struct snd_soc_card *card = dapm->card; + int ret = 0; + + trace_snd_soc_bias_level_start(card, level); + + if (card && card->set_bias_level) + ret = card->set_bias_level(card, dapm, level); + if (ret != 0) + goto out; + + if (!card || dapm != &card->dapm) + ret = snd_soc_dapm_force_bias_level(dapm, level); + + if (ret != 0) + goto out; + + if (card && card->set_bias_level_post) + ret = card->set_bias_level_post(card, dapm, level); +out: + trace_snd_soc_bias_level_done(card, level); + + return ret; +} + +/* connect mux widget to its interconnecting audio paths */ +static int dapm_connect_mux(struct snd_soc_dapm_context *dapm, + struct snd_soc_dapm_path *path, const char *control_name, + struct snd_soc_dapm_widget *w) +{ + const struct snd_kcontrol_new *kcontrol = &w->kcontrol_news[0]; + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + unsigned int val, item; + int i; + + if (e->reg != SND_SOC_NOPM) { + soc_dapm_read(dapm, e->reg, &val); + val = (val >> e->shift_l) & e->mask; + item = snd_soc_enum_val_to_item(e, val); + } else { + /* since a virtual mux has no backing registers to + * decide which path to connect, it will try to match + * with the first enumeration. This is to ensure + * that the default mux choice (the first) will be + * correctly powered up during initialization. + */ + item = 0; + } + + i = match_string(e->texts, e->items, control_name); + if (i < 0) + return -ENODEV; + + path->name = e->texts[i]; + path->connect = (i == item); + return 0; + +} + +/* set up initial codec paths */ +static void dapm_set_mixer_path_status(struct snd_soc_dapm_path *p, int i, + int nth_path) +{ + struct soc_mixer_control *mc = (struct soc_mixer_control *) + p->sink->kcontrol_news[i].private_value; + unsigned int reg = mc->reg; + unsigned int shift = mc->shift; + unsigned int max = mc->max; + unsigned int mask = (1 << fls(max)) - 1; + unsigned int invert = mc->invert; + unsigned int val; + + if (reg != SND_SOC_NOPM) { + soc_dapm_read(p->sink->dapm, reg, &val); + /* + * The nth_path argument allows this function to know + * which path of a kcontrol it is setting the initial + * status for. Ideally this would support any number + * of paths and channels. But since kcontrols only come + * in mono and stereo variants, we are limited to 2 + * channels. + * + * The following code assumes for stereo controls the + * first path is the left channel, and all remaining + * paths are the right channel. + */ + if (snd_soc_volsw_is_stereo(mc) && nth_path > 0) { + if (reg != mc->rreg) + soc_dapm_read(p->sink->dapm, mc->rreg, &val); + val = (val >> mc->rshift) & mask; + } else { + val = (val >> shift) & mask; + } + if (invert) + val = max - val; + p->connect = !!val; + } else { + /* since a virtual mixer has no backing registers to + * decide which path to connect, it will try to match + * with initial state. This is to ensure + * that the default mixer choice will be + * correctly powered up during initialization. + */ + p->connect = invert; + } +} + +/* connect mixer widget to its interconnecting audio paths */ +static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm, + struct snd_soc_dapm_path *path, const char *control_name) +{ + int i, nth_path = 0; + + /* search for mixer kcontrol */ + for (i = 0; i < path->sink->num_kcontrols; i++) { + if (!strcmp(control_name, path->sink->kcontrol_news[i].name)) { + path->name = path->sink->kcontrol_news[i].name; + dapm_set_mixer_path_status(path, i, nth_path++); + return 0; + } + } + return -ENODEV; +} + +static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm, + struct snd_soc_dapm_widget *kcontrolw, + const struct snd_kcontrol_new *kcontrol_new, + struct snd_kcontrol **kcontrol) +{ + struct snd_soc_dapm_widget *w; + int i; + + *kcontrol = NULL; + + list_for_each_entry(w, &dapm->card->widgets, list) { + if (w == kcontrolw || w->dapm != kcontrolw->dapm) + continue; + for (i = 0; i < w->num_kcontrols; i++) { + if (&w->kcontrol_news[i] == kcontrol_new) { + if (w->kcontrols) + *kcontrol = w->kcontrols[i]; + return 1; + } + } + } + + return 0; +} + +/* + * Determine if a kcontrol is shared. If it is, look it up. If it isn't, + * create it. Either way, add the widget into the control's widget list + */ +static int dapm_create_or_share_kcontrol(struct snd_soc_dapm_widget *w, + int kci) +{ + struct snd_soc_dapm_context *dapm = w->dapm; + struct snd_card *card = dapm->card->snd_card; + const char *prefix; + size_t prefix_len; + int shared; + struct snd_kcontrol *kcontrol; + bool wname_in_long_name, kcname_in_long_name; + char *long_name = NULL; + const char *name; + int ret = 0; + + prefix = soc_dapm_prefix(dapm); + if (prefix) + prefix_len = strlen(prefix) + 1; + else + prefix_len = 0; + + shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci], + &kcontrol); + + if (!kcontrol) { + if (shared) { + wname_in_long_name = false; + kcname_in_long_name = true; + } else { + switch (w->id) { + case snd_soc_dapm_switch: + case snd_soc_dapm_mixer: + case snd_soc_dapm_pga: + case snd_soc_dapm_out_drv: + wname_in_long_name = true; + kcname_in_long_name = true; + break; + case snd_soc_dapm_mixer_named_ctl: + wname_in_long_name = false; + kcname_in_long_name = true; + break; + case snd_soc_dapm_demux: + case snd_soc_dapm_mux: + wname_in_long_name = true; + kcname_in_long_name = false; + break; + default: + return -EINVAL; + } + } + + if (wname_in_long_name && kcname_in_long_name) { + /* + * The control will get a prefix from the control + * creation process but we're also using the same + * prefix for widgets so cut the prefix off the + * front of the widget name. + */ + long_name = kasprintf(GFP_KERNEL, "%s %s", + w->name + prefix_len, + w->kcontrol_news[kci].name); + if (long_name == NULL) + return -ENOMEM; + + name = long_name; + } else if (wname_in_long_name) { + long_name = NULL; + name = w->name + prefix_len; + } else { + long_name = NULL; + name = w->kcontrol_news[kci].name; + } + + kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name, + prefix); + if (!kcontrol) { + ret = -ENOMEM; + goto exit_free; + } + + kcontrol->private_free = dapm_kcontrol_free; + + ret = dapm_kcontrol_data_alloc(w, kcontrol, name); + if (ret) { + snd_ctl_free_one(kcontrol); + goto exit_free; + } + + ret = snd_ctl_add(card, kcontrol); + if (ret < 0) { + dev_err(dapm->dev, + "ASoC: failed to add widget %s dapm kcontrol %s: %d\n", + w->name, name, ret); + goto exit_free; + } + } + + ret = dapm_kcontrol_add_widget(kcontrol, w); + if (ret == 0) + w->kcontrols[kci] = kcontrol; + +exit_free: + kfree(long_name); + + return ret; +} + +/* create new dapm mixer control */ +static int dapm_new_mixer(struct snd_soc_dapm_widget *w) +{ + int i, ret; + struct snd_soc_dapm_path *path; + struct dapm_kcontrol_data *data; + + /* add kcontrol */ + for (i = 0; i < w->num_kcontrols; i++) { + /* match name */ + snd_soc_dapm_widget_for_each_source_path(w, path) { + /* mixer/mux paths name must match control name */ + if (path->name != (char *)w->kcontrol_news[i].name) + continue; + + if (!w->kcontrols[i]) { + ret = dapm_create_or_share_kcontrol(w, i); + if (ret < 0) + return ret; + } + + dapm_kcontrol_add_path(w->kcontrols[i], path); + + data = snd_kcontrol_chip(w->kcontrols[i]); + if (data->widget) + snd_soc_dapm_add_path(data->widget->dapm, + data->widget, + path->source, + NULL, NULL); + } + } + + return 0; +} + +/* create new dapm mux control */ +static int dapm_new_mux(struct snd_soc_dapm_widget *w) +{ + struct snd_soc_dapm_context *dapm = w->dapm; + enum snd_soc_dapm_direction dir; + struct snd_soc_dapm_path *path; + const char *type; + int ret; + + switch (w->id) { + case snd_soc_dapm_mux: + dir = SND_SOC_DAPM_DIR_OUT; + type = "mux"; + break; + case snd_soc_dapm_demux: + dir = SND_SOC_DAPM_DIR_IN; + type = "demux"; + break; + default: + return -EINVAL; + } + + if (w->num_kcontrols != 1) { + dev_err(dapm->dev, + "ASoC: %s %s has incorrect number of controls\n", type, + w->name); + return -EINVAL; + } + + if (list_empty(&w->edges[dir])) { + dev_err(dapm->dev, "ASoC: %s %s has no paths\n", type, w->name); + return -EINVAL; + } + + ret = dapm_create_or_share_kcontrol(w, 0); + if (ret < 0) + return ret; + + snd_soc_dapm_widget_for_each_path(w, dir, path) { + if (path->name) + dapm_kcontrol_add_path(w->kcontrols[0], path); + } + + return 0; +} + +/* create new dapm volume control */ +static int dapm_new_pga(struct snd_soc_dapm_widget *w) +{ + int i, ret; + + for (i = 0; i < w->num_kcontrols; i++) { + ret = dapm_create_or_share_kcontrol(w, i); + if (ret < 0) + return ret; + } + + return 0; +} + +/* create new dapm dai link control */ +static int dapm_new_dai_link(struct snd_soc_dapm_widget *w) +{ + int i, ret; + struct snd_kcontrol *kcontrol; + struct snd_soc_dapm_context *dapm = w->dapm; + struct snd_card *card = dapm->card->snd_card; + + /* create control for links with > 1 config */ + if (w->num_params <= 1) + return 0; + + /* add kcontrol */ + for (i = 0; i < w->num_kcontrols; i++) { + kcontrol = snd_soc_cnew(&w->kcontrol_news[i], w, + w->name, NULL); + ret = snd_ctl_add(card, kcontrol); + if (ret < 0) { + dev_err(dapm->dev, + "ASoC: failed to add widget %s dapm kcontrol %s: %d\n", + w->name, w->kcontrol_news[i].name, ret); + return ret; + } + kcontrol->private_data = w; + w->kcontrols[i] = kcontrol; + } + + return 0; +} + +/* We implement power down on suspend by checking the power state of + * the ALSA card - when we are suspending the ALSA state for the card + * is set to D3. + */ +static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget) +{ + int level = snd_power_get_state(widget->dapm->card->snd_card); + + switch (level) { + case SNDRV_CTL_POWER_D3hot: + case SNDRV_CTL_POWER_D3cold: + if (widget->ignore_suspend) + dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n", + widget->name); + return widget->ignore_suspend; + default: + return 1; + } +} + +static int dapm_widget_list_create(struct snd_soc_dapm_widget_list **list, + struct list_head *widgets) +{ + struct snd_soc_dapm_widget *w; + struct list_head *it; + unsigned int size = 0; + unsigned int i = 0; + + list_for_each(it, widgets) + size++; + + *list = kzalloc(struct_size(*list, widgets, size), GFP_KERNEL); + if (*list == NULL) + return -ENOMEM; + + list_for_each_entry(w, widgets, work_list) + (*list)->widgets[i++] = w; + + (*list)->num_widgets = i; + + return 0; +} + +/* + * Common implementation for is_connected_output_ep() and + * is_connected_input_ep(). The function is inlined since the combined size of + * the two specialized functions is only marginally larger then the size of the + * generic function and at the same time the fast path of the specialized + * functions is significantly smaller than the generic function. + */ +static __always_inline int is_connected_ep(struct snd_soc_dapm_widget *widget, + struct list_head *list, enum snd_soc_dapm_direction dir, + int (*fn)(struct snd_soc_dapm_widget *, struct list_head *, + bool (*custom_stop_condition)(struct snd_soc_dapm_widget *, + enum snd_soc_dapm_direction)), + bool (*custom_stop_condition)(struct snd_soc_dapm_widget *, + enum snd_soc_dapm_direction)) +{ + enum snd_soc_dapm_direction rdir = SND_SOC_DAPM_DIR_REVERSE(dir); + struct snd_soc_dapm_path *path; + int con = 0; + + if (widget->endpoints[dir] >= 0) + return widget->endpoints[dir]; + + DAPM_UPDATE_STAT(widget, path_checks); + + /* do we need to add this widget to the list ? */ + if (list) + list_add_tail(&widget->work_list, list); + + if (custom_stop_condition && custom_stop_condition(widget, dir)) { + list = NULL; + custom_stop_condition = NULL; + } + + if ((widget->is_ep & SND_SOC_DAPM_DIR_TO_EP(dir)) && widget->connected) { + widget->endpoints[dir] = snd_soc_dapm_suspend_check(widget); + return widget->endpoints[dir]; + } + + snd_soc_dapm_widget_for_each_path(widget, rdir, path) { + DAPM_UPDATE_STAT(widget, neighbour_checks); + + if (path->weak || path->is_supply) + continue; + + if (path->walking) + return 1; + + trace_snd_soc_dapm_path(widget, dir, path); + + if (path->connect) { + path->walking = 1; + con += fn(path->node[dir], list, custom_stop_condition); + path->walking = 0; + } + } + + widget->endpoints[dir] = con; + + return con; +} + +/* + * Recursively check for a completed path to an active or physically connected + * output widget. Returns number of complete paths. + * + * Optionally, can be supplied with a function acting as a stopping condition. + * This function takes the dapm widget currently being examined and the walk + * direction as an arguments, it should return true if widgets from that point + * in the graph onwards should not be added to the widget list. + */ +static int is_connected_output_ep(struct snd_soc_dapm_widget *widget, + struct list_head *list, + bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i, + enum snd_soc_dapm_direction)) +{ + return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_OUT, + is_connected_output_ep, custom_stop_condition); +} + +/* + * Recursively check for a completed path to an active or physically connected + * input widget. Returns number of complete paths. + * + * Optionally, can be supplied with a function acting as a stopping condition. + * This function takes the dapm widget currently being examined and the walk + * direction as an arguments, it should return true if the walk should be + * stopped and false otherwise. + */ +static int is_connected_input_ep(struct snd_soc_dapm_widget *widget, + struct list_head *list, + bool (*custom_stop_condition)(struct snd_soc_dapm_widget *i, + enum snd_soc_dapm_direction)) +{ + return is_connected_ep(widget, list, SND_SOC_DAPM_DIR_IN, + is_connected_input_ep, custom_stop_condition); +} + +/** + * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets. + * @dai: the soc DAI. + * @stream: stream direction. + * @list: list of active widgets for this stream. + * @custom_stop_condition: (optional) a function meant to stop the widget graph + * walk based on custom logic. + * + * Queries DAPM graph as to whether a valid audio stream path exists for + * the initial stream specified by name. This takes into account + * current mixer and mux kcontrol settings. Creates list of valid widgets. + * + * Optionally, can be supplied with a function acting as a stopping condition. + * This function takes the dapm widget currently being examined and the walk + * direction as an arguments, it should return true if the walk should be + * stopped and false otherwise. + * + * Returns the number of valid paths or negative error. + */ +int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream, + struct snd_soc_dapm_widget_list **list, + bool (*custom_stop_condition)(struct snd_soc_dapm_widget *, + enum snd_soc_dapm_direction)) +{ + struct snd_soc_card *card = dai->component->card; + struct snd_soc_dapm_widget *w; + LIST_HEAD(widgets); + int paths; + int ret; + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + + /* + * For is_connected_{output,input}_ep fully discover the graph we need + * to reset the cached number of inputs and outputs. + */ + list_for_each_entry(w, &card->widgets, list) { + w->endpoints[SND_SOC_DAPM_DIR_IN] = -1; + w->endpoints[SND_SOC_DAPM_DIR_OUT] = -1; + } + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) + paths = is_connected_output_ep(dai->playback_widget, &widgets, + custom_stop_condition); + else + paths = is_connected_input_ep(dai->capture_widget, &widgets, + custom_stop_condition); + + /* Drop starting point */ + list_del(widgets.next); + + ret = dapm_widget_list_create(list, &widgets); + if (ret) + paths = ret; + + trace_snd_soc_dapm_connected(paths, stream); + mutex_unlock(&card->dapm_mutex); + + return paths; +} + +/* + * Handler for regulator supply widget. + */ +int dapm_regulator_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + int ret; + + soc_dapm_async_complete(w->dapm); + + if (SND_SOC_DAPM_EVENT_ON(event)) { + if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) { + ret = regulator_allow_bypass(w->regulator, false); + if (ret != 0) + dev_warn(w->dapm->dev, + "ASoC: Failed to unbypass %s: %d\n", + w->name, ret); + } + + return regulator_enable(w->regulator); + } else { + if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) { + ret = regulator_allow_bypass(w->regulator, true); + if (ret != 0) + dev_warn(w->dapm->dev, + "ASoC: Failed to bypass %s: %d\n", + w->name, ret); + } + + return regulator_disable_deferred(w->regulator, w->shift); + } +} +EXPORT_SYMBOL_GPL(dapm_regulator_event); + +/* + * Handler for pinctrl widget. + */ +int dapm_pinctrl_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_dapm_pinctrl_priv *priv = w->priv; + struct pinctrl *p = w->pinctrl; + struct pinctrl_state *s; + + if (!p || !priv) + return -EIO; + + if (SND_SOC_DAPM_EVENT_ON(event)) + s = pinctrl_lookup_state(p, priv->active_state); + else + s = pinctrl_lookup_state(p, priv->sleep_state); + + if (IS_ERR(s)) + return PTR_ERR(s); + + return pinctrl_select_state(p, s); +} +EXPORT_SYMBOL_GPL(dapm_pinctrl_event); + +/* + * Handler for clock supply widget. + */ +int dapm_clock_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + if (!w->clk) + return -EIO; + + soc_dapm_async_complete(w->dapm); + +#ifdef CONFIG_HAVE_CLK + if (SND_SOC_DAPM_EVENT_ON(event)) { + return clk_prepare_enable(w->clk); + } else { + clk_disable_unprepare(w->clk); + return 0; + } +#endif + return 0; +} +EXPORT_SYMBOL_GPL(dapm_clock_event); + +static int dapm_widget_power_check(struct snd_soc_dapm_widget *w) +{ + if (w->power_checked) + return w->new_power; + + if (w->force) + w->new_power = 1; + else + w->new_power = w->power_check(w); + + w->power_checked = true; + + return w->new_power; +} + +/* Generic check to see if a widget should be powered. */ +static int dapm_generic_check_power(struct snd_soc_dapm_widget *w) +{ + int in, out; + + DAPM_UPDATE_STAT(w, power_checks); + + in = is_connected_input_ep(w, NULL, NULL); + out = is_connected_output_ep(w, NULL, NULL); + return out != 0 && in != 0; +} + +/* Check to see if a power supply is needed */ +static int dapm_supply_check_power(struct snd_soc_dapm_widget *w) +{ + struct snd_soc_dapm_path *path; + + DAPM_UPDATE_STAT(w, power_checks); + + /* Check if one of our outputs is connected */ + snd_soc_dapm_widget_for_each_sink_path(w, path) { + DAPM_UPDATE_STAT(w, neighbour_checks); + + if (path->weak) + continue; + + if (path->connected && + !path->connected(path->source, path->sink)) + continue; + + if (dapm_widget_power_check(path->sink)) + return 1; + } + + return 0; +} + +static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w) +{ + return w->connected; +} + +static int dapm_seq_compare(struct snd_soc_dapm_widget *a, + struct snd_soc_dapm_widget *b, + bool power_up) +{ + int *sort; + + if (power_up) + sort = dapm_up_seq; + else + sort = dapm_down_seq; + + if (sort[a->id] != sort[b->id]) + return sort[a->id] - sort[b->id]; + if (a->subseq != b->subseq) { + if (power_up) + return a->subseq - b->subseq; + else + return b->subseq - a->subseq; + } + if (a->reg != b->reg) + return a->reg - b->reg; + if (a->dapm != b->dapm) + return (unsigned long)a->dapm - (unsigned long)b->dapm; + + return 0; +} + +/* Insert a widget in order into a DAPM power sequence. */ +static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget, + struct list_head *list, + bool power_up) +{ + struct snd_soc_dapm_widget *w; + + list_for_each_entry(w, list, power_list) + if (dapm_seq_compare(new_widget, w, power_up) < 0) { + list_add_tail(&new_widget->power_list, &w->power_list); + return; + } + + list_add_tail(&new_widget->power_list, list); +} + +static void dapm_seq_check_event(struct snd_soc_card *card, + struct snd_soc_dapm_widget *w, int event) +{ + const char *ev_name; + int power, ret; + + switch (event) { + case SND_SOC_DAPM_PRE_PMU: + ev_name = "PRE_PMU"; + power = 1; + break; + case SND_SOC_DAPM_POST_PMU: + ev_name = "POST_PMU"; + power = 1; + break; + case SND_SOC_DAPM_PRE_PMD: + ev_name = "PRE_PMD"; + power = 0; + break; + case SND_SOC_DAPM_POST_PMD: + ev_name = "POST_PMD"; + power = 0; + break; + case SND_SOC_DAPM_WILL_PMU: + ev_name = "WILL_PMU"; + power = 1; + break; + case SND_SOC_DAPM_WILL_PMD: + ev_name = "WILL_PMD"; + power = 0; + break; + default: + WARN(1, "Unknown event %d\n", event); + return; + } + + if (w->new_power != power) + return; + + if (w->event && (w->event_flags & event)) { + pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n", + w->name, ev_name); + soc_dapm_async_complete(w->dapm); + trace_snd_soc_dapm_widget_event_start(w, event); + ret = w->event(w, NULL, event); + trace_snd_soc_dapm_widget_event_done(w, event); + if (ret < 0) + dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n", + ev_name, w->name, ret); + } +} + +/* Apply the coalesced changes from a DAPM sequence */ +static void dapm_seq_run_coalesced(struct snd_soc_card *card, + struct list_head *pending) +{ + struct snd_soc_dapm_context *dapm; + struct snd_soc_dapm_widget *w; + int reg; + unsigned int value = 0; + unsigned int mask = 0; + + w = list_first_entry(pending, struct snd_soc_dapm_widget, power_list); + reg = w->reg; + dapm = w->dapm; + + list_for_each_entry(w, pending, power_list) { + WARN_ON(reg != w->reg || dapm != w->dapm); + w->power = w->new_power; + + mask |= w->mask << w->shift; + if (w->power) + value |= w->on_val << w->shift; + else + value |= w->off_val << w->shift; + + pop_dbg(dapm->dev, card->pop_time, + "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n", + w->name, reg, value, mask); + + /* Check for events */ + dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU); + dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD); + } + + if (reg >= 0) { + /* Any widget will do, they should all be updating the + * same register. + */ + + pop_dbg(dapm->dev, card->pop_time, + "pop test : Applying 0x%x/0x%x to %x in %dms\n", + value, mask, reg, card->pop_time); + pop_wait(card->pop_time); + soc_dapm_update_bits(dapm, reg, mask, value); + } + + list_for_each_entry(w, pending, power_list) { + dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU); + dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD); + } +} + +/* Apply a DAPM power sequence. + * + * We walk over a pre-sorted list of widgets to apply power to. In + * order to minimise the number of writes to the device required + * multiple widgets will be updated in a single write where possible. + * Currently anything that requires more than a single write is not + * handled. + */ +static void dapm_seq_run(struct snd_soc_card *card, + struct list_head *list, int event, bool power_up) +{ + struct snd_soc_dapm_widget *w, *n; + struct snd_soc_dapm_context *d; + LIST_HEAD(pending); + int cur_sort = -1; + int cur_subseq = -1; + int cur_reg = SND_SOC_NOPM; + struct snd_soc_dapm_context *cur_dapm = NULL; + int ret, i; + int *sort; + + if (power_up) + sort = dapm_up_seq; + else + sort = dapm_down_seq; + + list_for_each_entry_safe(w, n, list, power_list) { + ret = 0; + + /* Do we need to apply any queued changes? */ + if (sort[w->id] != cur_sort || w->reg != cur_reg || + w->dapm != cur_dapm || w->subseq != cur_subseq) { + if (!list_empty(&pending)) + dapm_seq_run_coalesced(card, &pending); + + if (cur_dapm && cur_dapm->seq_notifier) { + for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++) + if (sort[i] == cur_sort) + cur_dapm->seq_notifier(cur_dapm, + i, + cur_subseq); + } + + if (cur_dapm && w->dapm != cur_dapm) + soc_dapm_async_complete(cur_dapm); + + INIT_LIST_HEAD(&pending); + cur_sort = -1; + cur_subseq = INT_MIN; + cur_reg = SND_SOC_NOPM; + cur_dapm = NULL; + } + + switch (w->id) { + case snd_soc_dapm_pre: + if (!w->event) + continue; + + if (event == SND_SOC_DAPM_STREAM_START) + ret = w->event(w, + NULL, SND_SOC_DAPM_PRE_PMU); + else if (event == SND_SOC_DAPM_STREAM_STOP) + ret = w->event(w, + NULL, SND_SOC_DAPM_PRE_PMD); + break; + + case snd_soc_dapm_post: + if (!w->event) + continue; + + if (event == SND_SOC_DAPM_STREAM_START) + ret = w->event(w, + NULL, SND_SOC_DAPM_POST_PMU); + else if (event == SND_SOC_DAPM_STREAM_STOP) + ret = w->event(w, + NULL, SND_SOC_DAPM_POST_PMD); + break; + + default: + /* Queue it up for application */ + cur_sort = sort[w->id]; + cur_subseq = w->subseq; + cur_reg = w->reg; + cur_dapm = w->dapm; + list_move(&w->power_list, &pending); + break; + } + + if (ret < 0) + dev_err(w->dapm->dev, + "ASoC: Failed to apply widget power: %d\n", ret); + } + + if (!list_empty(&pending)) + dapm_seq_run_coalesced(card, &pending); + + if (cur_dapm && cur_dapm->seq_notifier) { + for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++) + if (sort[i] == cur_sort) + cur_dapm->seq_notifier(cur_dapm, + i, cur_subseq); + } + + list_for_each_entry(d, &card->dapm_list, list) { + soc_dapm_async_complete(d); + } +} + +static void dapm_widget_update(struct snd_soc_card *card) +{ + struct snd_soc_dapm_update *update = card->update; + struct snd_soc_dapm_widget_list *wlist; + struct snd_soc_dapm_widget *w = NULL; + unsigned int wi; + int ret; + + if (!update || !dapm_kcontrol_is_powered(update->kcontrol)) + return; + + wlist = dapm_kcontrol_get_wlist(update->kcontrol); + + for (wi = 0; wi < wlist->num_widgets; wi++) { + w = wlist->widgets[wi]; + + if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) { + ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG); + if (ret != 0) + dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n", + w->name, ret); + } + } + + if (!w) + return; + + ret = soc_dapm_update_bits(w->dapm, update->reg, update->mask, + update->val); + if (ret < 0) + dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n", + w->name, ret); + + if (update->has_second_set) { + ret = soc_dapm_update_bits(w->dapm, update->reg2, + update->mask2, update->val2); + if (ret < 0) + dev_err(w->dapm->dev, + "ASoC: %s DAPM update failed: %d\n", + w->name, ret); + } + + for (wi = 0; wi < wlist->num_widgets; wi++) { + w = wlist->widgets[wi]; + + if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) { + ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG); + if (ret != 0) + dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n", + w->name, ret); + } + } +} + +/* Async callback run prior to DAPM sequences - brings to _PREPARE if + * they're changing state. + */ +static void dapm_pre_sequence_async(void *data, async_cookie_t cookie) +{ + struct snd_soc_dapm_context *d = data; + int ret; + + /* If we're off and we're not supposed to go into STANDBY */ + if (d->bias_level == SND_SOC_BIAS_OFF && + d->target_bias_level != SND_SOC_BIAS_OFF) { + if (d->dev) + pm_runtime_get_sync(d->dev); + + ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY); + if (ret != 0) + dev_err(d->dev, + "ASoC: Failed to turn on bias: %d\n", ret); + } + + /* Prepare for a transition to ON or away from ON */ + if ((d->target_bias_level == SND_SOC_BIAS_ON && + d->bias_level != SND_SOC_BIAS_ON) || + (d->target_bias_level != SND_SOC_BIAS_ON && + d->bias_level == SND_SOC_BIAS_ON)) { + ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE); + if (ret != 0) + dev_err(d->dev, + "ASoC: Failed to prepare bias: %d\n", ret); + } +} + +/* Async callback run prior to DAPM sequences - brings to their final + * state. + */ +static void dapm_post_sequence_async(void *data, async_cookie_t cookie) +{ + struct snd_soc_dapm_context *d = data; + int ret; + + /* If we just powered the last thing off drop to standby bias */ + if (d->bias_level == SND_SOC_BIAS_PREPARE && + (d->target_bias_level == SND_SOC_BIAS_STANDBY || + d->target_bias_level == SND_SOC_BIAS_OFF)) { + ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY); + if (ret != 0) + dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n", + ret); + } + + /* If we're in standby and can support bias off then do that */ + if (d->bias_level == SND_SOC_BIAS_STANDBY && + d->target_bias_level == SND_SOC_BIAS_OFF) { + ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF); + if (ret != 0) + dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n", + ret); + + if (d->dev) + pm_runtime_put(d->dev); + } + + /* If we just powered up then move to active bias */ + if (d->bias_level == SND_SOC_BIAS_PREPARE && + d->target_bias_level == SND_SOC_BIAS_ON) { + ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON); + if (ret != 0) + dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n", + ret); + } +} + +static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer, + bool power, bool connect) +{ + /* If a connection is being made or broken then that update + * will have marked the peer dirty, otherwise the widgets are + * not connected and this update has no impact. */ + if (!connect) + return; + + /* If the peer is already in the state we're moving to then we + * won't have an impact on it. */ + if (power != peer->power) + dapm_mark_dirty(peer, "peer state change"); +} + +static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power, + struct list_head *up_list, + struct list_head *down_list) +{ + struct snd_soc_dapm_path *path; + + if (w->power == power) + return; + + trace_snd_soc_dapm_widget_power(w, power); + + /* If we changed our power state perhaps our neigbours changed + * also. + */ + snd_soc_dapm_widget_for_each_source_path(w, path) + dapm_widget_set_peer_power(path->source, power, path->connect); + + /* Supplies can't affect their outputs, only their inputs */ + if (!w->is_supply) { + snd_soc_dapm_widget_for_each_sink_path(w, path) + dapm_widget_set_peer_power(path->sink, power, + path->connect); + } + + if (power) + dapm_seq_insert(w, up_list, true); + else + dapm_seq_insert(w, down_list, false); +} + +static void dapm_power_one_widget(struct snd_soc_dapm_widget *w, + struct list_head *up_list, + struct list_head *down_list) +{ + int power; + + switch (w->id) { + case snd_soc_dapm_pre: + dapm_seq_insert(w, down_list, false); + break; + case snd_soc_dapm_post: + dapm_seq_insert(w, up_list, true); + break; + + default: + power = dapm_widget_power_check(w); + + dapm_widget_set_power(w, power, up_list, down_list); + break; + } +} + +static bool dapm_idle_bias_off(struct snd_soc_dapm_context *dapm) +{ + if (dapm->idle_bias_off) + return true; + + switch (snd_power_get_state(dapm->card->snd_card)) { + case SNDRV_CTL_POWER_D3hot: + case SNDRV_CTL_POWER_D3cold: + return dapm->suspend_bias_off; + default: + break; + } + + return false; +} + +/* + * Scan each dapm widget for complete audio path. + * A complete path is a route that has valid endpoints i.e.:- + * + * o DAC to output pin. + * o Input pin to ADC. + * o Input pin to Output pin (bypass, sidetone) + * o DAC to ADC (loopback). + */ +static int dapm_power_widgets(struct snd_soc_card *card, int event) +{ + struct snd_soc_dapm_widget *w; + struct snd_soc_dapm_context *d; + LIST_HEAD(up_list); + LIST_HEAD(down_list); + ASYNC_DOMAIN_EXCLUSIVE(async_domain); + enum snd_soc_bias_level bias; + + lockdep_assert_held(&card->dapm_mutex); + + trace_snd_soc_dapm_start(card); + + list_for_each_entry(d, &card->dapm_list, list) { + if (dapm_idle_bias_off(d)) + d->target_bias_level = SND_SOC_BIAS_OFF; + else + d->target_bias_level = SND_SOC_BIAS_STANDBY; + } + + dapm_reset(card); + + /* Check which widgets we need to power and store them in + * lists indicating if they should be powered up or down. We + * only check widgets that have been flagged as dirty but note + * that new widgets may be added to the dirty list while we + * iterate. + */ + list_for_each_entry(w, &card->dapm_dirty, dirty) { + dapm_power_one_widget(w, &up_list, &down_list); + } + + list_for_each_entry(w, &card->widgets, list) { + switch (w->id) { + case snd_soc_dapm_pre: + case snd_soc_dapm_post: + /* These widgets always need to be powered */ + break; + default: + list_del_init(&w->dirty); + break; + } + + if (w->new_power) { + d = w->dapm; + + /* Supplies and micbiases only bring the + * context up to STANDBY as unless something + * else is active and passing audio they + * generally don't require full power. Signal + * generators are virtual pins and have no + * power impact themselves. + */ + switch (w->id) { + case snd_soc_dapm_siggen: + case snd_soc_dapm_vmid: + break; + case snd_soc_dapm_supply: + case snd_soc_dapm_regulator_supply: + case snd_soc_dapm_pinctrl: + case snd_soc_dapm_clock_supply: + case snd_soc_dapm_micbias: + if (d->target_bias_level < SND_SOC_BIAS_STANDBY) + d->target_bias_level = SND_SOC_BIAS_STANDBY; + break; + default: + d->target_bias_level = SND_SOC_BIAS_ON; + break; + } + } + + } + + /* Force all contexts in the card to the same bias state if + * they're not ground referenced. + */ + bias = SND_SOC_BIAS_OFF; + list_for_each_entry(d, &card->dapm_list, list) + if (d->target_bias_level > bias) + bias = d->target_bias_level; + list_for_each_entry(d, &card->dapm_list, list) + if (!dapm_idle_bias_off(d)) + d->target_bias_level = bias; + + trace_snd_soc_dapm_walk_done(card); + + /* Run card bias changes at first */ + dapm_pre_sequence_async(&card->dapm, 0); + /* Run other bias changes in parallel */ + list_for_each_entry(d, &card->dapm_list, list) { + if (d != &card->dapm) + async_schedule_domain(dapm_pre_sequence_async, d, + &async_domain); + } + async_synchronize_full_domain(&async_domain); + + list_for_each_entry(w, &down_list, power_list) { + dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD); + } + + list_for_each_entry(w, &up_list, power_list) { + dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU); + } + + /* Power down widgets first; try to avoid amplifying pops. */ + dapm_seq_run(card, &down_list, event, false); + + dapm_widget_update(card); + + /* Now power up. */ + dapm_seq_run(card, &up_list, event, true); + + /* Run all the bias changes in parallel */ + list_for_each_entry(d, &card->dapm_list, list) { + if (d != &card->dapm) + async_schedule_domain(dapm_post_sequence_async, d, + &async_domain); + } + async_synchronize_full_domain(&async_domain); + /* Run card bias changes at last */ + dapm_post_sequence_async(&card->dapm, 0); + + /* do we need to notify any clients that DAPM event is complete */ + list_for_each_entry(d, &card->dapm_list, list) { + if (d->stream_event) + d->stream_event(d, event); + } + + pop_dbg(card->dev, card->pop_time, + "DAPM sequencing finished, waiting %dms\n", card->pop_time); + pop_wait(card->pop_time); + + trace_snd_soc_dapm_done(card); + + return 0; +} + +#ifdef CONFIG_DEBUG_FS +static ssize_t dapm_widget_power_read_file(struct file *file, + char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct snd_soc_dapm_widget *w = file->private_data; + struct snd_soc_card *card = w->dapm->card; + enum snd_soc_dapm_direction dir, rdir; + char *buf; + int in, out; + ssize_t ret; + struct snd_soc_dapm_path *p = NULL; + + buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + mutex_lock(&card->dapm_mutex); + + /* Supply widgets are not handled by is_connected_{input,output}_ep() */ + if (w->is_supply) { + in = 0; + out = 0; + } else { + in = is_connected_input_ep(w, NULL, NULL); + out = is_connected_output_ep(w, NULL, NULL); + } + + ret = scnprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d", + w->name, w->power ? "On" : "Off", + w->force ? " (forced)" : "", in, out); + + if (w->reg >= 0) + ret += scnprintf(buf + ret, PAGE_SIZE - ret, + " - R%d(0x%x) mask 0x%x", + w->reg, w->reg, w->mask << w->shift); + + ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n"); + + if (w->sname) + ret += scnprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n", + w->sname, + w->active ? "active" : "inactive"); + + snd_soc_dapm_for_each_direction(dir) { + rdir = SND_SOC_DAPM_DIR_REVERSE(dir); + snd_soc_dapm_widget_for_each_path(w, dir, p) { + if (p->connected && !p->connected(p->source, p->sink)) + continue; + + if (!p->connect) + continue; + + ret += scnprintf(buf + ret, PAGE_SIZE - ret, + " %s \"%s\" \"%s\"\n", + (rdir == SND_SOC_DAPM_DIR_IN) ? "in" : "out", + p->name ? p->name : "static", + p->node[rdir]->name); + } + } + + mutex_unlock(&card->dapm_mutex); + + ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); + + kfree(buf); + return ret; +} + +static const struct file_operations dapm_widget_power_fops = { + .open = simple_open, + .read = dapm_widget_power_read_file, + .llseek = default_llseek, +}; + +static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct snd_soc_dapm_context *dapm = file->private_data; + char *level; + + switch (dapm->bias_level) { + case SND_SOC_BIAS_ON: + level = "On\n"; + break; + case SND_SOC_BIAS_PREPARE: + level = "Prepare\n"; + break; + case SND_SOC_BIAS_STANDBY: + level = "Standby\n"; + break; + case SND_SOC_BIAS_OFF: + level = "Off\n"; + break; + default: + WARN(1, "Unknown bias_level %d\n", dapm->bias_level); + level = "Unknown\n"; + break; + } + + return simple_read_from_buffer(user_buf, count, ppos, level, + strlen(level)); +} + +static const struct file_operations dapm_bias_fops = { + .open = simple_open, + .read = dapm_bias_read_file, + .llseek = default_llseek, +}; + +void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm, + struct dentry *parent) +{ + struct dentry *d; + + if (!parent || IS_ERR(parent)) + return; + + dapm->debugfs_dapm = debugfs_create_dir("dapm", parent); + + if (IS_ERR(dapm->debugfs_dapm)) { + dev_warn(dapm->dev, + "ASoC: Failed to create DAPM debugfs directory %ld\n", + PTR_ERR(dapm->debugfs_dapm)); + return; + } + + d = debugfs_create_file("bias_level", 0444, + dapm->debugfs_dapm, dapm, + &dapm_bias_fops); + if (IS_ERR(d)) + dev_warn(dapm->dev, + "ASoC: Failed to create bias level debugfs file: %ld\n", + PTR_ERR(d)); +} + +static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w) +{ + struct snd_soc_dapm_context *dapm = w->dapm; + struct dentry *d; + + if (!dapm->debugfs_dapm || !w->name) + return; + + d = debugfs_create_file(w->name, 0444, + dapm->debugfs_dapm, w, + &dapm_widget_power_fops); + if (IS_ERR(d)) + dev_warn(w->dapm->dev, + "ASoC: Failed to create %s debugfs file: %ld\n", + w->name, PTR_ERR(d)); +} + +static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm) +{ + debugfs_remove_recursive(dapm->debugfs_dapm); +} + +#else +void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm, + struct dentry *parent) +{ +} + +static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w) +{ +} + +static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm) +{ +} + +#endif + +/* + * soc_dapm_connect_path() - Connects or disconnects a path + * @path: The path to update + * @connect: The new connect state of the path. True if the path is connected, + * false if it is disconnected. + * @reason: The reason why the path changed (for debugging only) + */ +static void soc_dapm_connect_path(struct snd_soc_dapm_path *path, + bool connect, const char *reason) +{ + if (path->connect == connect) + return; + + path->connect = connect; + dapm_mark_dirty(path->source, reason); + dapm_mark_dirty(path->sink, reason); + dapm_path_invalidate(path); +} + +/* test and update the power status of a mux widget */ +static int soc_dapm_mux_update_power(struct snd_soc_card *card, + struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e) +{ + struct snd_soc_dapm_path *path; + int found = 0; + bool connect; + + lockdep_assert_held(&card->dapm_mutex); + + /* find dapm widget path assoc with kcontrol */ + dapm_kcontrol_for_each_path(path, kcontrol) { + found = 1; + /* we now need to match the string in the enum to the path */ + if (!(strcmp(path->name, e->texts[mux]))) + connect = true; + else + connect = false; + + soc_dapm_connect_path(path, connect, "mux update"); + } + + if (found) + dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP); + + return found; +} + +int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm, + struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e, + struct snd_soc_dapm_update *update) +{ + struct snd_soc_card *card = dapm->card; + int ret; + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + card->update = update; + ret = soc_dapm_mux_update_power(card, kcontrol, mux, e); + card->update = NULL; + mutex_unlock(&card->dapm_mutex); + if (ret > 0) + soc_dpcm_runtime_update(card); + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power); + +/* test and update the power status of a mixer or switch widget */ +static int soc_dapm_mixer_update_power(struct snd_soc_card *card, + struct snd_kcontrol *kcontrol, + int connect, int rconnect) +{ + struct snd_soc_dapm_path *path; + int found = 0; + + lockdep_assert_held(&card->dapm_mutex); + + /* find dapm widget path assoc with kcontrol */ + dapm_kcontrol_for_each_path(path, kcontrol) { + /* + * Ideally this function should support any number of + * paths and channels. But since kcontrols only come + * in mono and stereo variants, we are limited to 2 + * channels. + * + * The following code assumes for stereo controls the + * first path (when 'found == 0') is the left channel, + * and all remaining paths (when 'found == 1') are the + * right channel. + * + * A stereo control is signified by a valid 'rconnect' + * value, either 0 for unconnected, or >= 0 for connected. + * This is chosen instead of using snd_soc_volsw_is_stereo, + * so that the behavior of snd_soc_dapm_mixer_update_power + * doesn't change even when the kcontrol passed in is + * stereo. + * + * It passes 'connect' as the path connect status for + * the left channel, and 'rconnect' for the right + * channel. + */ + if (found && rconnect >= 0) + soc_dapm_connect_path(path, rconnect, "mixer update"); + else + soc_dapm_connect_path(path, connect, "mixer update"); + found = 1; + } + + if (found) + dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP); + + return found; +} + +int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm, + struct snd_kcontrol *kcontrol, int connect, + struct snd_soc_dapm_update *update) +{ + struct snd_soc_card *card = dapm->card; + int ret; + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + card->update = update; + ret = soc_dapm_mixer_update_power(card, kcontrol, connect, -1); + card->update = NULL; + mutex_unlock(&card->dapm_mutex); + if (ret > 0) + soc_dpcm_runtime_update(card); + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power); + +static ssize_t dapm_widget_show_component(struct snd_soc_component *cmpnt, + char *buf) +{ + struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt); + struct snd_soc_dapm_widget *w; + int count = 0; + char *state = "not set"; + + /* card won't be set for the dummy component, as a spot fix + * we're checking for that case specifically here but in future + * we will ensure that the dummy component looks like others. + */ + if (!cmpnt->card) + return 0; + + list_for_each_entry(w, &cmpnt->card->widgets, list) { + if (w->dapm != dapm) + continue; + + /* only display widgets that burn power */ + switch (w->id) { + case snd_soc_dapm_hp: + case snd_soc_dapm_mic: + case snd_soc_dapm_spk: + case snd_soc_dapm_line: + case snd_soc_dapm_micbias: + case snd_soc_dapm_dac: + case snd_soc_dapm_adc: + case snd_soc_dapm_pga: + case snd_soc_dapm_out_drv: + case snd_soc_dapm_mixer: + case snd_soc_dapm_mixer_named_ctl: + case snd_soc_dapm_supply: + case snd_soc_dapm_regulator_supply: + case snd_soc_dapm_pinctrl: + case snd_soc_dapm_clock_supply: + if (w->name) + count += sprintf(buf + count, "%s: %s\n", + w->name, w->power ? "On":"Off"); + break; + default: + break; + } + } + + switch (snd_soc_dapm_get_bias_level(dapm)) { + case SND_SOC_BIAS_ON: + state = "On"; + break; + case SND_SOC_BIAS_PREPARE: + state = "Prepare"; + break; + case SND_SOC_BIAS_STANDBY: + state = "Standby"; + break; + case SND_SOC_BIAS_OFF: + state = "Off"; + break; + } + count += sprintf(buf + count, "PM State: %s\n", state); + + return count; +} + +/* show dapm widget status in sys fs */ +static ssize_t dapm_widget_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev); + int i, count = 0; + + mutex_lock(&rtd->card->dapm_mutex); + + for (i = 0; i < rtd->num_codecs; i++) { + struct snd_soc_component *cmpnt = rtd->codec_dais[i]->component; + + count += dapm_widget_show_component(cmpnt, buf + count); + } + + mutex_unlock(&rtd->card->dapm_mutex); + + return count; +} + +static DEVICE_ATTR_RO(dapm_widget); + +struct attribute *soc_dapm_dev_attrs[] = { + &dev_attr_dapm_widget.attr, + NULL +}; + +static void dapm_free_path(struct snd_soc_dapm_path *path) +{ + list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]); + list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]); + list_del(&path->list_kcontrol); + list_del(&path->list); + kfree(path); +} + +void snd_soc_dapm_free_widget(struct snd_soc_dapm_widget *w) +{ + struct snd_soc_dapm_path *p, *next_p; + enum snd_soc_dapm_direction dir; + + list_del(&w->list); + list_del(&w->dirty); + /* + * remove source and sink paths associated to this widget. + * While removing the path, remove reference to it from both + * source and sink widgets so that path is removed only once. + */ + snd_soc_dapm_for_each_direction(dir) { + snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p) + dapm_free_path(p); + } + + kfree(w->kcontrols); + kfree_const(w->name); + kfree(w); +} + +void snd_soc_dapm_reset_cache(struct snd_soc_dapm_context *dapm) +{ + dapm->path_sink_cache.widget = NULL; + dapm->path_source_cache.widget = NULL; +} + +/* free all dapm widgets and resources */ +static void dapm_free_widgets(struct snd_soc_dapm_context *dapm) +{ + struct snd_soc_dapm_widget *w, *next_w; + + list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) { + if (w->dapm != dapm) + continue; + snd_soc_dapm_free_widget(w); + } + snd_soc_dapm_reset_cache(dapm); +} + +static struct snd_soc_dapm_widget *dapm_find_widget( + struct snd_soc_dapm_context *dapm, const char *pin, + bool search_other_contexts) +{ + struct snd_soc_dapm_widget *w; + struct snd_soc_dapm_widget *fallback = NULL; + + list_for_each_entry(w, &dapm->card->widgets, list) { + if (!strcmp(w->name, pin)) { + if (w->dapm == dapm) + return w; + else + fallback = w; + } + } + + if (search_other_contexts) + return fallback; + + return NULL; +} + +/* + * set the DAPM pin status: + * returns 1 when the value has been updated, 0 when unchanged, or a negative + * error code; called from kcontrol put callback + */ +static int __snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm, + const char *pin, int status) +{ + struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true); + int ret = 0; + + dapm_assert_locked(dapm); + + if (!w) { + dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin); + return -EINVAL; + } + + if (w->connected != status) { + dapm_mark_dirty(w, "pin configuration"); + dapm_widget_invalidate_input_paths(w); + dapm_widget_invalidate_output_paths(w); + ret = 1; + } + + w->connected = status; + if (status == 0) + w->force = 0; + + return ret; +} + +/* + * similar as __snd_soc_dapm_set_pin(), but returns 0 when successful; + * called from several API functions below + */ +static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm, + const char *pin, int status) +{ + int ret = __snd_soc_dapm_set_pin(dapm, pin, status); + + return ret < 0 ? ret : 0; +} + +/** + * snd_soc_dapm_sync_unlocked - scan and power dapm paths + * @dapm: DAPM context + * + * Walks all dapm audio paths and powers widgets according to their + * stream or path usage. + * + * Requires external locking. + * + * Returns 0 for success. + */ +int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm) +{ + /* + * Suppress early reports (eg, jacks syncing their state) to avoid + * silly DAPM runs during card startup. + */ + if (!dapm->card || !dapm->card->instantiated) + return 0; + + return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP); +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked); + +/** + * snd_soc_dapm_sync - scan and power dapm paths + * @dapm: DAPM context + * + * Walks all dapm audio paths and powers widgets according to their + * stream or path usage. + * + * Returns 0 for success. + */ +int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm) +{ + int ret; + + mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + ret = snd_soc_dapm_sync_unlocked(dapm); + mutex_unlock(&dapm->card->dapm_mutex); + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_sync); + +/* + * dapm_update_widget_flags() - Re-compute widget sink and source flags + * @w: The widget for which to update the flags + * + * Some widgets have a dynamic category which depends on which neighbors they + * are connected to. This function update the category for these widgets. + * + * This function must be called whenever a path is added or removed to a widget. + */ +static void dapm_update_widget_flags(struct snd_soc_dapm_widget *w) +{ + enum snd_soc_dapm_direction dir; + struct snd_soc_dapm_path *p; + unsigned int ep; + + switch (w->id) { + case snd_soc_dapm_input: + /* On a fully routed card an input is never a source */ + if (w->dapm->card->fully_routed) + return; + ep = SND_SOC_DAPM_EP_SOURCE; + snd_soc_dapm_widget_for_each_source_path(w, p) { + if (p->source->id == snd_soc_dapm_micbias || + p->source->id == snd_soc_dapm_mic || + p->source->id == snd_soc_dapm_line || + p->source->id == snd_soc_dapm_output) { + ep = 0; + break; + } + } + break; + case snd_soc_dapm_output: + /* On a fully routed card a output is never a sink */ + if (w->dapm->card->fully_routed) + return; + ep = SND_SOC_DAPM_EP_SINK; + snd_soc_dapm_widget_for_each_sink_path(w, p) { + if (p->sink->id == snd_soc_dapm_spk || + p->sink->id == snd_soc_dapm_hp || + p->sink->id == snd_soc_dapm_line || + p->sink->id == snd_soc_dapm_input) { + ep = 0; + break; + } + } + break; + case snd_soc_dapm_line: + ep = 0; + snd_soc_dapm_for_each_direction(dir) { + if (!list_empty(&w->edges[dir])) + ep |= SND_SOC_DAPM_DIR_TO_EP(dir); + } + break; + default: + return; + } + + w->is_ep = ep; +} + +static int snd_soc_dapm_check_dynamic_path(struct snd_soc_dapm_context *dapm, + struct snd_soc_dapm_widget *source, struct snd_soc_dapm_widget *sink, + const char *control) +{ + bool dynamic_source = false; + bool dynamic_sink = false; + + if (!control) + return 0; + + switch (source->id) { + case snd_soc_dapm_demux: + dynamic_source = true; + break; + default: + break; + } + + switch (sink->id) { + case snd_soc_dapm_mux: + case snd_soc_dapm_switch: + case snd_soc_dapm_mixer: + case snd_soc_dapm_mixer_named_ctl: + dynamic_sink = true; + break; + default: + break; + } + + if (dynamic_source && dynamic_sink) { + dev_err(dapm->dev, + "Direct connection between demux and mixer/mux not supported for path %s -> [%s] -> %s\n", + source->name, control, sink->name); + return -EINVAL; + } else if (!dynamic_source && !dynamic_sink) { + dev_err(dapm->dev, + "Control not supported for path %s -> [%s] -> %s\n", + source->name, control, sink->name); + return -EINVAL; + } + + return 0; +} + +static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm, + struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink, + const char *control, + int (*connected)(struct snd_soc_dapm_widget *source, + struct snd_soc_dapm_widget *sink)) +{ + struct snd_soc_dapm_widget *widgets[2]; + enum snd_soc_dapm_direction dir; + struct snd_soc_dapm_path *path; + int ret; + + if (wsink->is_supply && !wsource->is_supply) { + dev_err(dapm->dev, + "Connecting non-supply widget to supply widget is not supported (%s -> %s)\n", + wsource->name, wsink->name); + return -EINVAL; + } + + if (connected && !wsource->is_supply) { + dev_err(dapm->dev, + "connected() callback only supported for supply widgets (%s -> %s)\n", + wsource->name, wsink->name); + return -EINVAL; + } + + if (wsource->is_supply && control) { + dev_err(dapm->dev, + "Conditional paths are not supported for supply widgets (%s -> [%s] -> %s)\n", + wsource->name, control, wsink->name); + return -EINVAL; + } + + ret = snd_soc_dapm_check_dynamic_path(dapm, wsource, wsink, control); + if (ret) + return ret; + + path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL); + if (!path) + return -ENOMEM; + + path->node[SND_SOC_DAPM_DIR_IN] = wsource; + path->node[SND_SOC_DAPM_DIR_OUT] = wsink; + widgets[SND_SOC_DAPM_DIR_IN] = wsource; + widgets[SND_SOC_DAPM_DIR_OUT] = wsink; + + path->connected = connected; + INIT_LIST_HEAD(&path->list); + INIT_LIST_HEAD(&path->list_kcontrol); + + if (wsource->is_supply || wsink->is_supply) + path->is_supply = 1; + + /* connect static paths */ + if (control == NULL) { + path->connect = 1; + } else { + switch (wsource->id) { + case snd_soc_dapm_demux: + ret = dapm_connect_mux(dapm, path, control, wsource); + if (ret) + goto err; + break; + default: + break; + } + + switch (wsink->id) { + case snd_soc_dapm_mux: + ret = dapm_connect_mux(dapm, path, control, wsink); + if (ret != 0) + goto err; + break; + case snd_soc_dapm_switch: + case snd_soc_dapm_mixer: + case snd_soc_dapm_mixer_named_ctl: + ret = dapm_connect_mixer(dapm, path, control); + if (ret != 0) + goto err; + break; + default: + break; + } + } + + list_add(&path->list, &dapm->card->paths); + snd_soc_dapm_for_each_direction(dir) + list_add(&path->list_node[dir], &widgets[dir]->edges[dir]); + + snd_soc_dapm_for_each_direction(dir) { + dapm_update_widget_flags(widgets[dir]); + dapm_mark_dirty(widgets[dir], "Route added"); + } + + if (dapm->card->instantiated && path->connect) + dapm_path_invalidate(path); + + return 0; +err: + kfree(path); + return ret; +} + +static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_route *route) +{ + struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w; + struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL; + const char *sink; + const char *source; + char prefixed_sink[80]; + char prefixed_source[80]; + const char *prefix; + int ret; + + prefix = soc_dapm_prefix(dapm); + if (prefix) { + snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s", + prefix, route->sink); + sink = prefixed_sink; + snprintf(prefixed_source, sizeof(prefixed_source), "%s %s", + prefix, route->source); + source = prefixed_source; + } else { + sink = route->sink; + source = route->source; + } + + wsource = dapm_wcache_lookup(&dapm->path_source_cache, source); + wsink = dapm_wcache_lookup(&dapm->path_sink_cache, sink); + + if (wsink && wsource) + goto skip_search; + + /* + * find src and dest widgets over all widgets but favor a widget from + * current DAPM context + */ + list_for_each_entry(w, &dapm->card->widgets, list) { + if (!wsink && !(strcmp(w->name, sink))) { + wtsink = w; + if (w->dapm == dapm) { + wsink = w; + if (wsource) + break; + } + continue; + } + if (!wsource && !(strcmp(w->name, source))) { + wtsource = w; + if (w->dapm == dapm) { + wsource = w; + if (wsink) + break; + } + } + } + /* use widget from another DAPM context if not found from this */ + if (!wsink) + wsink = wtsink; + if (!wsource) + wsource = wtsource; + + if (wsource == NULL) { + dev_err(dapm->dev, "ASoC: no source widget found for %s\n", + route->source); + return -ENODEV; + } + if (wsink == NULL) { + dev_err(dapm->dev, "ASoC: no sink widget found for %s\n", + route->sink); + return -ENODEV; + } + +skip_search: + dapm_wcache_update(&dapm->path_sink_cache, wsink); + dapm_wcache_update(&dapm->path_source_cache, wsource); + + ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control, + route->connected); + if (ret) + goto err; + + return 0; +err: + dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n", + source, route->control, sink); + return ret; +} + +static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_route *route) +{ + struct snd_soc_dapm_widget *wsource, *wsink; + struct snd_soc_dapm_path *path, *p; + const char *sink; + const char *source; + char prefixed_sink[80]; + char prefixed_source[80]; + const char *prefix; + + if (route->control) { + dev_err(dapm->dev, + "ASoC: Removal of routes with controls not supported\n"); + return -EINVAL; + } + + prefix = soc_dapm_prefix(dapm); + if (prefix) { + snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s", + prefix, route->sink); + sink = prefixed_sink; + snprintf(prefixed_source, sizeof(prefixed_source), "%s %s", + prefix, route->source); + source = prefixed_source; + } else { + sink = route->sink; + source = route->source; + } + + path = NULL; + list_for_each_entry(p, &dapm->card->paths, list) { + if (strcmp(p->source->name, source) != 0) + continue; + if (strcmp(p->sink->name, sink) != 0) + continue; + path = p; + break; + } + + if (path) { + wsource = path->source; + wsink = path->sink; + + dapm_mark_dirty(wsource, "Route removed"); + dapm_mark_dirty(wsink, "Route removed"); + if (path->connect) + dapm_path_invalidate(path); + + dapm_free_path(path); + + /* Update any path related flags */ + dapm_update_widget_flags(wsource); + dapm_update_widget_flags(wsink); + } else { + dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n", + source, sink); + } + + return 0; +} + +/** + * snd_soc_dapm_add_routes - Add routes between DAPM widgets + * @dapm: DAPM context + * @route: audio routes + * @num: number of routes + * + * Connects 2 dapm widgets together via a named audio path. The sink is + * the widget receiving the audio signal, whilst the source is the sender + * of the audio signal. + * + * Returns 0 for success else error. On error all resources can be freed + * with a call to snd_soc_card_free(). + */ +int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_route *route, int num) +{ + int i, r, ret = 0; + + mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + for (i = 0; i < num; i++) { + r = snd_soc_dapm_add_route(dapm, route); + if (r < 0) { + dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n", + route->source, + route->control ? route->control : "direct", + route->sink); + ret = r; + } + route++; + } + mutex_unlock(&dapm->card->dapm_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes); + +/** + * snd_soc_dapm_del_routes - Remove routes between DAPM widgets + * @dapm: DAPM context + * @route: audio routes + * @num: number of routes + * + * Removes routes from the DAPM context. + */ +int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_route *route, int num) +{ + int i; + + mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + for (i = 0; i < num; i++) { + snd_soc_dapm_del_route(dapm, route); + route++; + } + mutex_unlock(&dapm->card->dapm_mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes); + +static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_route *route) +{ + struct snd_soc_dapm_widget *source = dapm_find_widget(dapm, + route->source, + true); + struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm, + route->sink, + true); + struct snd_soc_dapm_path *path; + int count = 0; + + if (!source) { + dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n", + route->source); + return -ENODEV; + } + + if (!sink) { + dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n", + route->sink); + return -ENODEV; + } + + if (route->control || route->connected) + dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n", + route->source, route->sink); + + snd_soc_dapm_widget_for_each_sink_path(source, path) { + if (path->sink == sink) { + path->weak = 1; + count++; + } + } + + if (count == 0) + dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n", + route->source, route->sink); + if (count > 1) + dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n", + count, route->source, route->sink); + + return 0; +} + +/** + * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak + * @dapm: DAPM context + * @route: audio routes + * @num: number of routes + * + * Mark existing routes matching those specified in the passed array + * as being weak, meaning that they are ignored for the purpose of + * power decisions. The main intended use case is for sidetone paths + * which couple audio between other independent paths if they are both + * active in order to make the combination work better at the user + * level but which aren't intended to be "used". + * + * Note that CODEC drivers should not use this as sidetone type paths + * can frequently also be used as bypass paths. + */ +int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_route *route, int num) +{ + int i, err; + int ret = 0; + + mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT); + for (i = 0; i < num; i++) { + err = snd_soc_dapm_weak_route(dapm, route); + if (err) + ret = err; + route++; + } + mutex_unlock(&dapm->card->dapm_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes); + +/** + * snd_soc_dapm_new_widgets - add new dapm widgets + * @card: card to be checked for new dapm widgets + * + * Checks the codec for any new dapm widgets and creates them if found. + * + * Returns 0 for success. + */ +int snd_soc_dapm_new_widgets(struct snd_soc_card *card) +{ + struct snd_soc_dapm_widget *w; + unsigned int val; + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT); + + list_for_each_entry(w, &card->widgets, list) + { + if (w->new) + continue; + + if (w->num_kcontrols) { + w->kcontrols = kcalloc(w->num_kcontrols, + sizeof(struct snd_kcontrol *), + GFP_KERNEL); + if (!w->kcontrols) { + mutex_unlock(&card->dapm_mutex); + return -ENOMEM; + } + } + + switch(w->id) { + case snd_soc_dapm_switch: + case snd_soc_dapm_mixer: + case snd_soc_dapm_mixer_named_ctl: + dapm_new_mixer(w); + break; + case snd_soc_dapm_mux: + case snd_soc_dapm_demux: + dapm_new_mux(w); + break; + case snd_soc_dapm_pga: + case snd_soc_dapm_out_drv: + dapm_new_pga(w); + break; + case snd_soc_dapm_dai_link: + dapm_new_dai_link(w); + break; + default: + break; + } + + /* Read the initial power state from the device */ + if (w->reg >= 0) { + soc_dapm_read(w->dapm, w->reg, &val); + val = val >> w->shift; + val &= w->mask; + if (val == w->on_val) + w->power = 1; + } + + w->new = 1; + + dapm_mark_dirty(w, "new widget"); + dapm_debugfs_add_widget(w); + } + + dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP); + mutex_unlock(&card->dapm_mutex); + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets); + +/** + * snd_soc_dapm_get_volsw - dapm mixer get callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to get the value of a dapm mixer control. + * + * Returns 0 for success. + */ +int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol); + struct snd_soc_card *card = dapm->card; + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + int reg = mc->reg; + unsigned int shift = mc->shift; + int max = mc->max; + unsigned int width = fls(max); + unsigned int mask = (1 << fls(max)) - 1; + unsigned int invert = mc->invert; + unsigned int reg_val, val, rval = 0; + int ret = 0; + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM) { + ret = soc_dapm_read(dapm, reg, ®_val); + val = (reg_val >> shift) & mask; + + if (ret == 0 && reg != mc->rreg) + ret = soc_dapm_read(dapm, mc->rreg, ®_val); + + if (snd_soc_volsw_is_stereo(mc)) + rval = (reg_val >> mc->rshift) & mask; + } else { + reg_val = dapm_kcontrol_get_value(kcontrol); + val = reg_val & mask; + + if (snd_soc_volsw_is_stereo(mc)) + rval = (reg_val >> width) & mask; + } + mutex_unlock(&card->dapm_mutex); + + if (ret) + return ret; + + if (invert) + ucontrol->value.integer.value[0] = max - val; + else + ucontrol->value.integer.value[0] = val; + + if (snd_soc_volsw_is_stereo(mc)) { + if (invert) + ucontrol->value.integer.value[1] = max - rval; + else + ucontrol->value.integer.value[1] = rval; + } + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw); + +/** + * snd_soc_dapm_put_volsw - dapm mixer set callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to set the value of a dapm mixer control. + * + * Returns 0 for success. + */ +int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol); + struct snd_soc_card *card = dapm->card; + struct soc_mixer_control *mc = + (struct soc_mixer_control *)kcontrol->private_value; + int reg = mc->reg; + unsigned int shift = mc->shift; + int max = mc->max; + unsigned int width = fls(max); + unsigned int mask = (1 << width) - 1; + unsigned int invert = mc->invert; + unsigned int val, rval = 0; + int connect, rconnect = -1, change, reg_change = 0; + struct snd_soc_dapm_update update = {}; + int ret = 0; + + val = (ucontrol->value.integer.value[0] & mask); + connect = !!val; + + if (invert) + val = max - val; + + if (snd_soc_volsw_is_stereo(mc)) { + rval = (ucontrol->value.integer.value[1] & mask); + rconnect = !!rval; + if (invert) + rval = max - rval; + } + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + + /* This assumes field width < (bits in unsigned int / 2) */ + if (width > sizeof(unsigned int) * 8 / 2) + dev_warn(dapm->dev, + "ASoC: control %s field width limit exceeded\n", + kcontrol->id.name); + change = dapm_kcontrol_set_value(kcontrol, val | (rval << width)); + + if (reg != SND_SOC_NOPM) { + val = val << shift; + rval = rval << mc->rshift; + + reg_change = soc_dapm_test_bits(dapm, reg, mask << shift, val); + + if (snd_soc_volsw_is_stereo(mc)) + reg_change |= soc_dapm_test_bits(dapm, mc->rreg, + mask << mc->rshift, + rval); + } + + if (change || reg_change) { + if (reg_change) { + if (snd_soc_volsw_is_stereo(mc)) { + update.has_second_set = true; + update.reg2 = mc->rreg; + update.mask2 = mask << mc->rshift; + update.val2 = rval; + } + update.kcontrol = kcontrol; + update.reg = reg; + update.mask = mask << shift; + update.val = val; + card->update = &update; + } + + ret = soc_dapm_mixer_update_power(card, kcontrol, connect, + rconnect); + + card->update = NULL; + } + + mutex_unlock(&card->dapm_mutex); + + if (ret > 0) + soc_dpcm_runtime_update(card); + + return change; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw); + +/** + * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to get the value of a dapm enumerated double mixer control. + * + * Returns 0 for success. + */ +int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol); + struct snd_soc_card *card = dapm->card; + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + unsigned int reg_val, val; + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + if (e->reg != SND_SOC_NOPM && dapm_kcontrol_is_powered(kcontrol)) { + int ret = soc_dapm_read(dapm, e->reg, ®_val); + if (ret) { + mutex_unlock(&card->dapm_mutex); + return ret; + } + } else { + reg_val = dapm_kcontrol_get_value(kcontrol); + } + mutex_unlock(&card->dapm_mutex); + + val = (reg_val >> e->shift_l) & e->mask; + ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val); + if (e->shift_l != e->shift_r) { + val = (reg_val >> e->shift_r) & e->mask; + val = snd_soc_enum_val_to_item(e, val); + ucontrol->value.enumerated.item[1] = val; + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double); + +/** + * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback + * @kcontrol: mixer control + * @ucontrol: control element information + * + * Callback to set the value of a dapm enumerated double mixer control. + * + * Returns 0 for success. + */ +int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol); + struct snd_soc_card *card = dapm->card; + struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; + unsigned int *item = ucontrol->value.enumerated.item; + unsigned int val, change, reg_change = 0; + unsigned int mask; + struct snd_soc_dapm_update update = {}; + int ret = 0; + + if (item[0] >= e->items) + return -EINVAL; + + val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l; + mask = e->mask << e->shift_l; + if (e->shift_l != e->shift_r) { + if (item[1] > e->items) + return -EINVAL; + val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_r; + mask |= e->mask << e->shift_r; + } + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + + change = dapm_kcontrol_set_value(kcontrol, val); + + if (e->reg != SND_SOC_NOPM) + reg_change = soc_dapm_test_bits(dapm, e->reg, mask, val); + + if (change || reg_change) { + if (reg_change) { + update.kcontrol = kcontrol; + update.reg = e->reg; + update.mask = mask; + update.val = val; + card->update = &update; + } + + ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e); + + card->update = NULL; + } + + mutex_unlock(&card->dapm_mutex); + + if (ret > 0) + soc_dpcm_runtime_update(card); + + return change; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double); + +/** + * snd_soc_dapm_info_pin_switch - Info for a pin switch + * + * @kcontrol: mixer control + * @uinfo: control element information + * + * Callback to provide information about a pin switch control. + */ +int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 1; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch); + +/** + * snd_soc_dapm_get_pin_switch - Get information for a pin switch + * + * @kcontrol: mixer control + * @ucontrol: Value + */ +int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + const char *pin = (const char *)kcontrol->private_value; + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + + ucontrol->value.integer.value[0] = + snd_soc_dapm_get_pin_status(&card->dapm, pin); + + mutex_unlock(&card->dapm_mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch); + +/** + * snd_soc_dapm_put_pin_switch - Set information for a pin switch + * + * @kcontrol: mixer control + * @ucontrol: Value + */ +int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_card *card = snd_kcontrol_chip(kcontrol); + const char *pin = (const char *)kcontrol->private_value; + int ret; + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + ret = __snd_soc_dapm_set_pin(&card->dapm, pin, + !!ucontrol->value.integer.value[0]); + mutex_unlock(&card->dapm_mutex); + + snd_soc_dapm_sync(&card->dapm); + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch); + +struct snd_soc_dapm_widget * +snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_widget *widget) +{ + struct snd_soc_dapm_widget *w; + + mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + w = snd_soc_dapm_new_control_unlocked(dapm, widget); + /* Do not nag about probe deferrals */ + if (IS_ERR(w)) { + int ret = PTR_ERR(w); + + if (ret != -EPROBE_DEFER) + dev_err(dapm->dev, + "ASoC: Failed to create DAPM control %s (%d)\n", + widget->name, ret); + goto out_unlock; + } + if (!w) + dev_err(dapm->dev, + "ASoC: Failed to create DAPM control %s\n", + widget->name); + +out_unlock: + mutex_unlock(&dapm->card->dapm_mutex); + return w; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control); + +struct snd_soc_dapm_widget * +snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_widget *widget) +{ + enum snd_soc_dapm_direction dir; + struct snd_soc_dapm_widget *w; + const char *prefix; + int ret; + + if ((w = dapm_cnew_widget(widget)) == NULL) + return NULL; + + switch (w->id) { + case snd_soc_dapm_regulator_supply: + w->regulator = devm_regulator_get(dapm->dev, w->name); + if (IS_ERR(w->regulator)) { + ret = PTR_ERR(w->regulator); + if (ret == -EPROBE_DEFER) + return ERR_PTR(ret); + dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n", + w->name, ret); + return NULL; + } + + if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) { + ret = regulator_allow_bypass(w->regulator, true); + if (ret != 0) + dev_warn(w->dapm->dev, + "ASoC: Failed to bypass %s: %d\n", + w->name, ret); + } + break; + case snd_soc_dapm_pinctrl: + w->pinctrl = devm_pinctrl_get(dapm->dev); + if (IS_ERR(w->pinctrl)) { + ret = PTR_ERR(w->pinctrl); + if (ret == -EPROBE_DEFER) + return ERR_PTR(ret); + dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n", + w->name, ret); + return NULL; + } + break; + case snd_soc_dapm_clock_supply: +#ifdef CONFIG_CLKDEV_LOOKUP + w->clk = devm_clk_get(dapm->dev, w->name); + if (IS_ERR(w->clk)) { + ret = PTR_ERR(w->clk); + if (ret == -EPROBE_DEFER) + return ERR_PTR(ret); + dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n", + w->name, ret); + return NULL; + } +#else + return NULL; +#endif + break; + default: + break; + } + + prefix = soc_dapm_prefix(dapm); + if (prefix) + w->name = kasprintf(GFP_KERNEL, "%s %s", prefix, widget->name); + else + w->name = kstrdup_const(widget->name, GFP_KERNEL); + if (w->name == NULL) { + kfree(w); + return NULL; + } + + switch (w->id) { + case snd_soc_dapm_mic: + w->is_ep = SND_SOC_DAPM_EP_SOURCE; + w->power_check = dapm_generic_check_power; + break; + case snd_soc_dapm_input: + if (!dapm->card->fully_routed) + w->is_ep = SND_SOC_DAPM_EP_SOURCE; + w->power_check = dapm_generic_check_power; + break; + case snd_soc_dapm_spk: + case snd_soc_dapm_hp: + w->is_ep = SND_SOC_DAPM_EP_SINK; + w->power_check = dapm_generic_check_power; + break; + case snd_soc_dapm_output: + if (!dapm->card->fully_routed) + w->is_ep = SND_SOC_DAPM_EP_SINK; + w->power_check = dapm_generic_check_power; + break; + case snd_soc_dapm_vmid: + case snd_soc_dapm_siggen: + w->is_ep = SND_SOC_DAPM_EP_SOURCE; + w->power_check = dapm_always_on_check_power; + break; + case snd_soc_dapm_sink: + w->is_ep = SND_SOC_DAPM_EP_SINK; + w->power_check = dapm_always_on_check_power; + break; + + case snd_soc_dapm_mux: + case snd_soc_dapm_demux: + case snd_soc_dapm_switch: + case snd_soc_dapm_mixer: + case snd_soc_dapm_mixer_named_ctl: + case snd_soc_dapm_adc: + case snd_soc_dapm_aif_out: + case snd_soc_dapm_dac: + case snd_soc_dapm_aif_in: + case snd_soc_dapm_pga: + case snd_soc_dapm_out_drv: + case snd_soc_dapm_micbias: + case snd_soc_dapm_line: + case snd_soc_dapm_dai_link: + case snd_soc_dapm_dai_out: + case snd_soc_dapm_dai_in: + w->power_check = dapm_generic_check_power; + break; + case snd_soc_dapm_supply: + case snd_soc_dapm_regulator_supply: + case snd_soc_dapm_pinctrl: + case snd_soc_dapm_clock_supply: + case snd_soc_dapm_kcontrol: + w->is_supply = 1; + w->power_check = dapm_supply_check_power; + break; + default: + w->power_check = dapm_always_on_check_power; + break; + } + + w->dapm = dapm; + INIT_LIST_HEAD(&w->list); + INIT_LIST_HEAD(&w->dirty); + list_add_tail(&w->list, &dapm->card->widgets); + + snd_soc_dapm_for_each_direction(dir) { + INIT_LIST_HEAD(&w->edges[dir]); + w->endpoints[dir] = -1; + } + + /* machine layer sets up unconnected pins and insertions */ + w->connected = 1; + return w; +} + +/** + * snd_soc_dapm_new_controls - create new dapm controls + * @dapm: DAPM context + * @widget: widget array + * @num: number of widgets + * + * Creates new DAPM controls based upon the templates. + * + * Returns 0 for success else error. + */ +int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_widget *widget, + int num) +{ + struct snd_soc_dapm_widget *w; + int i; + int ret = 0; + + mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT); + for (i = 0; i < num; i++) { + w = snd_soc_dapm_new_control_unlocked(dapm, widget); + if (IS_ERR(w)) { + ret = PTR_ERR(w); + /* Do not nag about probe deferrals */ + if (ret == -EPROBE_DEFER) + break; + dev_err(dapm->dev, + "ASoC: Failed to create DAPM control %s (%d)\n", + widget->name, ret); + break; + } + if (!w) { + dev_err(dapm->dev, + "ASoC: Failed to create DAPM control %s\n", + widget->name); + ret = -ENOMEM; + break; + } + widget++; + } + mutex_unlock(&dapm->card->dapm_mutex); + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls); + +static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_dapm_path *source_p, *sink_p; + struct snd_soc_dai *source, *sink; + struct snd_soc_pcm_runtime *rtd = w->priv; + const struct snd_soc_pcm_stream *config = w->params + w->params_select; + struct snd_pcm_substream substream; + struct snd_pcm_hw_params *params = NULL; + struct snd_pcm_runtime *runtime = NULL; + unsigned int fmt; + int ret = 0; + + if (WARN_ON(!config) || + WARN_ON(list_empty(&w->edges[SND_SOC_DAPM_DIR_OUT]) || + list_empty(&w->edges[SND_SOC_DAPM_DIR_IN]))) + return -EINVAL; + + /* We only support a single source and sink, pick the first */ + source_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_OUT], + struct snd_soc_dapm_path, + list_node[SND_SOC_DAPM_DIR_OUT]); + sink_p = list_first_entry(&w->edges[SND_SOC_DAPM_DIR_IN], + struct snd_soc_dapm_path, + list_node[SND_SOC_DAPM_DIR_IN]); + + source = source_p->source->priv; + sink = sink_p->sink->priv; + + /* Be a little careful as we don't want to overflow the mask array */ + if (config->formats) { + fmt = ffs(config->formats) - 1; + } else { + dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n", + config->formats); + fmt = 0; + } + + /* Currently very limited parameter selection */ + params = kzalloc(sizeof(*params), GFP_KERNEL); + if (!params) { + ret = -ENOMEM; + goto out; + } + snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt); + + hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min = + config->rate_min; + hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max = + config->rate_max; + + hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min + = config->channels_min; + hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max + = config->channels_max; + + memset(&substream, 0, sizeof(substream)); + + /* Allocate a dummy snd_pcm_runtime for startup() and other ops() */ + runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); + if (!runtime) { + ret = -ENOMEM; + goto out; + } + substream.runtime = runtime; + substream.private_data = rtd; + + switch (event) { + case SND_SOC_DAPM_PRE_PMU: + substream.stream = SNDRV_PCM_STREAM_CAPTURE; + if (source->driver->ops->startup) { + ret = source->driver->ops->startup(&substream, source); + if (ret < 0) { + dev_err(source->dev, + "ASoC: startup() failed: %d\n", ret); + goto out; + } + source->active++; + } + ret = soc_dai_hw_params(&substream, params, source); + if (ret < 0) + goto out; + + substream.stream = SNDRV_PCM_STREAM_PLAYBACK; + if (sink->driver->ops->startup) { + ret = sink->driver->ops->startup(&substream, sink); + if (ret < 0) { + dev_err(sink->dev, + "ASoC: startup() failed: %d\n", ret); + goto out; + } + sink->active++; + } + ret = soc_dai_hw_params(&substream, params, sink); + if (ret < 0) + goto out; + break; + + case SND_SOC_DAPM_POST_PMU: + ret = snd_soc_dai_digital_mute(sink, 0, + SNDRV_PCM_STREAM_PLAYBACK); + if (ret != 0 && ret != -ENOTSUPP) + dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret); + ret = 0; + break; + + case SND_SOC_DAPM_PRE_PMD: + ret = snd_soc_dai_digital_mute(sink, 1, + SNDRV_PCM_STREAM_PLAYBACK); + if (ret != 0 && ret != -ENOTSUPP) + dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret); + ret = 0; + + source->active--; + if (source->driver->ops->shutdown) { + substream.stream = SNDRV_PCM_STREAM_CAPTURE; + source->driver->ops->shutdown(&substream, source); + } + + sink->active--; + if (sink->driver->ops->shutdown) { + substream.stream = SNDRV_PCM_STREAM_PLAYBACK; + sink->driver->ops->shutdown(&substream, sink); + } + break; + + default: + WARN(1, "Unknown event %d\n", event); + ret = -EINVAL; + } + +out: + kfree(runtime); + kfree(params); + return ret; +} + +static int snd_soc_dapm_dai_link_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol); + + ucontrol->value.enumerated.item[0] = w->params_select; + + return 0; +} + +static int snd_soc_dapm_dai_link_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_widget *w = snd_kcontrol_chip(kcontrol); + + /* Can't change the config when widget is already powered */ + if (w->power) + return -EBUSY; + + if (ucontrol->value.enumerated.item[0] == w->params_select) + return 0; + + if (ucontrol->value.enumerated.item[0] >= w->num_params) + return -EINVAL; + + w->params_select = ucontrol->value.enumerated.item[0]; + + return 1; +} + +static void +snd_soc_dapm_free_kcontrol(struct snd_soc_card *card, + unsigned long *private_value, + int num_params, + const char **w_param_text) +{ + int count; + + devm_kfree(card->dev, (void *)*private_value); + + if (!w_param_text) + return; + + for (count = 0 ; count < num_params; count++) + devm_kfree(card->dev, (void *)w_param_text[count]); + devm_kfree(card->dev, w_param_text); +} + +static struct snd_kcontrol_new * +snd_soc_dapm_alloc_kcontrol(struct snd_soc_card *card, + char *link_name, + const struct snd_soc_pcm_stream *params, + int num_params, const char **w_param_text, + unsigned long *private_value) +{ + struct soc_enum w_param_enum[] = { + SOC_ENUM_SINGLE(0, 0, 0, NULL), + }; + struct snd_kcontrol_new kcontrol_dai_link[] = { + SOC_ENUM_EXT(NULL, w_param_enum[0], + snd_soc_dapm_dai_link_get, + snd_soc_dapm_dai_link_put), + }; + struct snd_kcontrol_new *kcontrol_news; + const struct snd_soc_pcm_stream *config = params; + int count; + + for (count = 0 ; count < num_params; count++) { + if (!config->stream_name) { + dev_warn(card->dapm.dev, + "ASoC: anonymous config %d for dai link %s\n", + count, link_name); + w_param_text[count] = + devm_kasprintf(card->dev, GFP_KERNEL, + "Anonymous Configuration %d", + count); + } else { + w_param_text[count] = devm_kmemdup(card->dev, + config->stream_name, + strlen(config->stream_name) + 1, + GFP_KERNEL); + } + if (!w_param_text[count]) + goto outfree_w_param; + config++; + } + + w_param_enum[0].items = num_params; + w_param_enum[0].texts = w_param_text; + + *private_value = + (unsigned long) devm_kmemdup(card->dev, + (void *)(kcontrol_dai_link[0].private_value), + sizeof(struct soc_enum), GFP_KERNEL); + if (!*private_value) { + dev_err(card->dev, "ASoC: Failed to create control for %s widget\n", + link_name); + goto outfree_w_param; + } + kcontrol_dai_link[0].private_value = *private_value; + /* duplicate kcontrol_dai_link on heap so that memory persists */ + kcontrol_news = devm_kmemdup(card->dev, &kcontrol_dai_link[0], + sizeof(struct snd_kcontrol_new), + GFP_KERNEL); + if (!kcontrol_news) { + dev_err(card->dev, "ASoC: Failed to create control for %s widget\n", + link_name); + goto outfree_w_param; + } + return kcontrol_news; + +outfree_w_param: + snd_soc_dapm_free_kcontrol(card, private_value, num_params, w_param_text); + return NULL; +} + +int snd_soc_dapm_new_pcm(struct snd_soc_card *card, + struct snd_soc_pcm_runtime *rtd, + const struct snd_soc_pcm_stream *params, + unsigned int num_params, + struct snd_soc_dapm_widget *source, + struct snd_soc_dapm_widget *sink) +{ + struct snd_soc_dapm_widget template; + struct snd_soc_dapm_widget *w; + const char **w_param_text; + unsigned long private_value; + char *link_name; + int ret; + + link_name = devm_kasprintf(card->dev, GFP_KERNEL, "%s-%s", + source->name, sink->name); + if (!link_name) + return -ENOMEM; + + memset(&template, 0, sizeof(template)); + template.reg = SND_SOC_NOPM; + template.id = snd_soc_dapm_dai_link; + template.name = link_name; + template.event = snd_soc_dai_link_event; + template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU | + SND_SOC_DAPM_PRE_PMD; + template.kcontrol_news = NULL; + + /* allocate memory for control, only in case of multiple configs */ + if (num_params > 1) { + w_param_text = devm_kcalloc(card->dev, num_params, + sizeof(char *), GFP_KERNEL); + if (!w_param_text) { + ret = -ENOMEM; + goto param_fail; + } + + template.num_kcontrols = 1; + template.kcontrol_news = + snd_soc_dapm_alloc_kcontrol(card, + link_name, params, num_params, + w_param_text, &private_value); + if (!template.kcontrol_news) { + ret = -ENOMEM; + goto param_fail; + } + } else { + w_param_text = NULL; + } + dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name); + + w = snd_soc_dapm_new_control_unlocked(&card->dapm, &template); + if (IS_ERR(w)) { + ret = PTR_ERR(w); + /* Do not nag about probe deferrals */ + if (ret != -EPROBE_DEFER) + dev_err(card->dev, + "ASoC: Failed to create %s widget (%d)\n", + link_name, ret); + goto outfree_kcontrol_news; + } + if (!w) { + dev_err(card->dev, "ASoC: Failed to create %s widget\n", + link_name); + ret = -ENOMEM; + goto outfree_kcontrol_news; + } + + w->params = params; + w->num_params = num_params; + w->priv = rtd; + + ret = snd_soc_dapm_add_path(&card->dapm, source, w, NULL, NULL); + if (ret) + goto outfree_w; + return snd_soc_dapm_add_path(&card->dapm, w, sink, NULL, NULL); + +outfree_w: + devm_kfree(card->dev, w); +outfree_kcontrol_news: + devm_kfree(card->dev, (void *)template.kcontrol_news); + snd_soc_dapm_free_kcontrol(card, &private_value, num_params, w_param_text); +param_fail: + devm_kfree(card->dev, link_name); + return ret; +} + +int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm, + struct snd_soc_dai *dai) +{ + struct snd_soc_dapm_widget template; + struct snd_soc_dapm_widget *w; + + WARN_ON(dapm->dev != dai->dev); + + memset(&template, 0, sizeof(template)); + template.reg = SND_SOC_NOPM; + + if (dai->driver->playback.stream_name) { + template.id = snd_soc_dapm_dai_in; + template.name = dai->driver->playback.stream_name; + template.sname = dai->driver->playback.stream_name; + + dev_dbg(dai->dev, "ASoC: adding %s widget\n", + template.name); + + w = snd_soc_dapm_new_control_unlocked(dapm, &template); + if (IS_ERR(w)) { + int ret = PTR_ERR(w); + + /* Do not nag about probe deferrals */ + if (ret != -EPROBE_DEFER) + dev_err(dapm->dev, + "ASoC: Failed to create %s widget (%d)\n", + dai->driver->playback.stream_name, ret); + return ret; + } + if (!w) { + dev_err(dapm->dev, "ASoC: Failed to create %s widget\n", + dai->driver->playback.stream_name); + return -ENOMEM; + } + + w->priv = dai; + dai->playback_widget = w; + } + + if (dai->driver->capture.stream_name) { + template.id = snd_soc_dapm_dai_out; + template.name = dai->driver->capture.stream_name; + template.sname = dai->driver->capture.stream_name; + + dev_dbg(dai->dev, "ASoC: adding %s widget\n", + template.name); + + w = snd_soc_dapm_new_control_unlocked(dapm, &template); + if (IS_ERR(w)) { + int ret = PTR_ERR(w); + + /* Do not nag about probe deferrals */ + if (ret != -EPROBE_DEFER) + dev_err(dapm->dev, + "ASoC: Failed to create %s widget (%d)\n", + dai->driver->playback.stream_name, ret); + return ret; + } + if (!w) { + dev_err(dapm->dev, "ASoC: Failed to create %s widget\n", + dai->driver->capture.stream_name); + return -ENOMEM; + } + + w->priv = dai; + dai->capture_widget = w; + } + + return 0; +} + +int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card) +{ + struct snd_soc_dapm_widget *dai_w, *w; + struct snd_soc_dapm_widget *src, *sink; + struct snd_soc_dai *dai; + + /* For each DAI widget... */ + list_for_each_entry(dai_w, &card->widgets, list) { + switch (dai_w->id) { + case snd_soc_dapm_dai_in: + case snd_soc_dapm_dai_out: + break; + default: + continue; + } + + /* let users know there is no DAI to link */ + if (!dai_w->priv) { + dev_dbg(card->dev, "dai widget %s has no DAI\n", + dai_w->name); + continue; + } + + dai = dai_w->priv; + + /* ...find all widgets with the same stream and link them */ + list_for_each_entry(w, &card->widgets, list) { + if (w->dapm != dai_w->dapm) + continue; + + switch (w->id) { + case snd_soc_dapm_dai_in: + case snd_soc_dapm_dai_out: + continue; + default: + break; + } + + if (!w->sname || !strstr(w->sname, dai_w->sname)) + continue; + + if (dai_w->id == snd_soc_dapm_dai_in) { + src = dai_w; + sink = w; + } else { + src = w; + sink = dai_w; + } + dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name); + snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL); + } + } + + return 0; +} + +static void dapm_connect_dai_link_widgets(struct snd_soc_card *card, + struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct snd_soc_dapm_widget *sink, *source; + int i; + + for (i = 0; i < rtd->num_codecs; i++) { + struct snd_soc_dai *codec_dai = rtd->codec_dais[i]; + + /* connect BE DAI playback if widgets are valid */ + if (codec_dai->playback_widget && cpu_dai->playback_widget) { + source = cpu_dai->playback_widget; + sink = codec_dai->playback_widget; + dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n", + cpu_dai->component->name, source->name, + codec_dai->component->name, sink->name); + + snd_soc_dapm_add_path(&card->dapm, source, sink, + NULL, NULL); + } + + /* connect BE DAI capture if widgets are valid */ + if (codec_dai->capture_widget && cpu_dai->capture_widget) { + source = codec_dai->capture_widget; + sink = cpu_dai->capture_widget; + dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n", + codec_dai->component->name, source->name, + cpu_dai->component->name, sink->name); + + snd_soc_dapm_add_path(&card->dapm, source, sink, + NULL, NULL); + } + } +} + +static void soc_dapm_dai_stream_event(struct snd_soc_dai *dai, int stream, + int event) +{ + struct snd_soc_dapm_widget *w; + unsigned int ep; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) + w = dai->playback_widget; + else + w = dai->capture_widget; + + if (w) { + dapm_mark_dirty(w, "stream event"); + + if (w->id == snd_soc_dapm_dai_in) { + ep = SND_SOC_DAPM_EP_SOURCE; + dapm_widget_invalidate_input_paths(w); + } else { + ep = SND_SOC_DAPM_EP_SINK; + dapm_widget_invalidate_output_paths(w); + } + + switch (event) { + case SND_SOC_DAPM_STREAM_START: + w->active = 1; + w->is_ep = ep; + break; + case SND_SOC_DAPM_STREAM_STOP: + w->active = 0; + w->is_ep = 0; + break; + case SND_SOC_DAPM_STREAM_SUSPEND: + case SND_SOC_DAPM_STREAM_RESUME: + case SND_SOC_DAPM_STREAM_PAUSE_PUSH: + case SND_SOC_DAPM_STREAM_PAUSE_RELEASE: + break; + } + } +} + +void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card) +{ + struct snd_soc_pcm_runtime *rtd; + + /* for each BE DAI link... */ + list_for_each_entry(rtd, &card->rtd_list, list) { + /* + * dynamic FE links have no fixed DAI mapping. + * CODEC<->CODEC links have no direct connection. + */ + if (rtd->dai_link->dynamic || rtd->dai_link->params) + continue; + + dapm_connect_dai_link_widgets(card, rtd); + } +} + +static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream, + int event) +{ + int i; + + soc_dapm_dai_stream_event(rtd->cpu_dai, stream, event); + for (i = 0; i < rtd->num_codecs; i++) + soc_dapm_dai_stream_event(rtd->codec_dais[i], stream, event); + + dapm_power_widgets(rtd->card, event); +} + +/** + * snd_soc_dapm_stream_event - send a stream event to the dapm core + * @rtd: PCM runtime data + * @stream: stream name + * @event: stream event + * + * Sends a stream event to the dapm core. The core then makes any + * necessary widget power changes. + * + * Returns 0 for success else error. + */ +void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream, + int event) +{ + struct snd_soc_card *card = rtd->card; + + mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + soc_dapm_stream_event(rtd, stream, event); + mutex_unlock(&card->dapm_mutex); +} + +/** + * snd_soc_dapm_enable_pin_unlocked - enable pin. + * @dapm: DAPM context + * @pin: pin name + * + * Enables input/output pin and its parents or children widgets iff there is + * a valid audio route and active audio stream. + * + * Requires external locking. + * + * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to + * do any widget power switching. + */ +int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm, + const char *pin) +{ + return snd_soc_dapm_set_pin(dapm, pin, 1); +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked); + +/** + * snd_soc_dapm_enable_pin - enable pin. + * @dapm: DAPM context + * @pin: pin name + * + * Enables input/output pin and its parents or children widgets iff there is + * a valid audio route and active audio stream. + * + * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to + * do any widget power switching. + */ +int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin) +{ + int ret; + + mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + + ret = snd_soc_dapm_set_pin(dapm, pin, 1); + + mutex_unlock(&dapm->card->dapm_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin); + +/** + * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled + * @dapm: DAPM context + * @pin: pin name + * + * Enables input/output pin regardless of any other state. This is + * intended for use with microphone bias supplies used in microphone + * jack detection. + * + * Requires external locking. + * + * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to + * do any widget power switching. + */ +int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm, + const char *pin) +{ + struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true); + + if (!w) { + dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin); + return -EINVAL; + } + + dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin); + if (!w->connected) { + /* + * w->force does not affect the number of input or output paths, + * so we only have to recheck if w->connected is changed + */ + dapm_widget_invalidate_input_paths(w); + dapm_widget_invalidate_output_paths(w); + w->connected = 1; + } + w->force = 1; + dapm_mark_dirty(w, "force enable"); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked); + +/** + * snd_soc_dapm_force_enable_pin - force a pin to be enabled + * @dapm: DAPM context + * @pin: pin name + * + * Enables input/output pin regardless of any other state. This is + * intended for use with microphone bias supplies used in microphone + * jack detection. + * + * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to + * do any widget power switching. + */ +int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm, + const char *pin) +{ + int ret; + + mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + + ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin); + + mutex_unlock(&dapm->card->dapm_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin); + +/** + * snd_soc_dapm_disable_pin_unlocked - disable pin. + * @dapm: DAPM context + * @pin: pin name + * + * Disables input/output pin and its parents or children widgets. + * + * Requires external locking. + * + * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to + * do any widget power switching. + */ +int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm, + const char *pin) +{ + return snd_soc_dapm_set_pin(dapm, pin, 0); +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked); + +/** + * snd_soc_dapm_disable_pin - disable pin. + * @dapm: DAPM context + * @pin: pin name + * + * Disables input/output pin and its parents or children widgets. + * + * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to + * do any widget power switching. + */ +int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm, + const char *pin) +{ + int ret; + + mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + + ret = snd_soc_dapm_set_pin(dapm, pin, 0); + + mutex_unlock(&dapm->card->dapm_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin); + +/** + * snd_soc_dapm_nc_pin_unlocked - permanently disable pin. + * @dapm: DAPM context + * @pin: pin name + * + * Marks the specified pin as being not connected, disabling it along + * any parent or child widgets. At present this is identical to + * snd_soc_dapm_disable_pin() but in future it will be extended to do + * additional things such as disabling controls which only affect + * paths through the pin. + * + * Requires external locking. + * + * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to + * do any widget power switching. + */ +int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm, + const char *pin) +{ + return snd_soc_dapm_set_pin(dapm, pin, 0); +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked); + +/** + * snd_soc_dapm_nc_pin - permanently disable pin. + * @dapm: DAPM context + * @pin: pin name + * + * Marks the specified pin as being not connected, disabling it along + * any parent or child widgets. At present this is identical to + * snd_soc_dapm_disable_pin() but in future it will be extended to do + * additional things such as disabling controls which only affect + * paths through the pin. + * + * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to + * do any widget power switching. + */ +int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin) +{ + int ret; + + mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME); + + ret = snd_soc_dapm_set_pin(dapm, pin, 0); + + mutex_unlock(&dapm->card->dapm_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin); + +/** + * snd_soc_dapm_get_pin_status - get audio pin status + * @dapm: DAPM context + * @pin: audio signal pin endpoint (or start point) + * + * Get audio pin status - connected or disconnected. + * + * Returns 1 for connected otherwise 0. + */ +int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm, + const char *pin) +{ + struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true); + + if (w) + return w->connected; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status); + +/** + * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint + * @dapm: DAPM context + * @pin: audio signal pin endpoint (or start point) + * + * Mark the given endpoint or pin as ignoring suspend. When the + * system is disabled a path between two endpoints flagged as ignoring + * suspend will not be disabled. The path must already be enabled via + * normal means at suspend time, it will not be turned on if it was not + * already enabled. + */ +int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm, + const char *pin) +{ + struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false); + + if (!w) { + dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin); + return -EINVAL; + } + + w->ignore_suspend = 1; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend); + +/** + * snd_soc_dapm_free - free dapm resources + * @dapm: DAPM context + * + * Free all dapm widgets and resources. + */ +void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm) +{ + dapm_debugfs_cleanup(dapm); + dapm_free_widgets(dapm); + list_del(&dapm->list); +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_free); + +static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm) +{ + struct snd_soc_card *card = dapm->card; + struct snd_soc_dapm_widget *w; + LIST_HEAD(down_list); + int powerdown = 0; + + mutex_lock(&card->dapm_mutex); + + list_for_each_entry(w, &dapm->card->widgets, list) { + if (w->dapm != dapm) + continue; + if (w->power) { + dapm_seq_insert(w, &down_list, false); + w->new_power = 0; + powerdown = 1; + } + } + + /* If there were no widgets to power down we're already in + * standby. + */ + if (powerdown) { + if (dapm->bias_level == SND_SOC_BIAS_ON) + snd_soc_dapm_set_bias_level(dapm, + SND_SOC_BIAS_PREPARE); + dapm_seq_run(card, &down_list, 0, false); + if (dapm->bias_level == SND_SOC_BIAS_PREPARE) + snd_soc_dapm_set_bias_level(dapm, + SND_SOC_BIAS_STANDBY); + } + + mutex_unlock(&card->dapm_mutex); +} + +/* + * snd_soc_dapm_shutdown - callback for system shutdown + */ +void snd_soc_dapm_shutdown(struct snd_soc_card *card) +{ + struct snd_soc_dapm_context *dapm; + + list_for_each_entry(dapm, &card->dapm_list, list) { + if (dapm != &card->dapm) { + soc_dapm_shutdown_dapm(dapm); + if (dapm->bias_level == SND_SOC_BIAS_STANDBY) + snd_soc_dapm_set_bias_level(dapm, + SND_SOC_BIAS_OFF); + } + } + + soc_dapm_shutdown_dapm(&card->dapm); + if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY) + snd_soc_dapm_set_bias_level(&card->dapm, + SND_SOC_BIAS_OFF); +} + +/* Module information */ +MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk"); +MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC"); +MODULE_LICENSE("GPL"); |