| /* |
| * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management |
| * |
| * Copyright 2005 Wolfson Microelectronics PLC. |
| * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| * 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/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_clock_supply] = 1, |
| [snd_soc_dapm_supply] = 2, |
| [snd_soc_dapm_micbias] = 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_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_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_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_pga] = 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_micbias] = 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_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 << e->shift_l; |
| 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); |
| 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) |
| data->widget->on_val = value; |
| |
| 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; |
| } |
| |
| for (i = 0; i < e->items; i++) { |
| if (!(strcmp(control_name, e->texts[i]))) { |
| path->name = e->texts[i]; |
| if (i == item) |
| path->connect = 1; |
| else |
| path->connect = 0; |
| return 0; |
| } |
| } |
| |
| return -ENODEV; |
| } |
| |
| /* 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 { |
| p->connect = 0; |
| } |
| } |
| |
| /* 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(sizeof(**list) + size * sizeof(*w), 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)) { |
| widget->endpoints[dir] = 1; |
| return widget->endpoints[dir]; |
| } |
| |
| 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 the walk should be |
| * stopped and false otherwise. |
| */ |
| 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 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) |
| list_for_each_entry_safe_continue(w, n, list, |
| power_list); |
| |
| 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) |
| list_for_each_entry_safe_continue(w, n, list, |
| power_list); |
| |
| 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_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 = snprintf(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 += snprintf(buf + ret, PAGE_SIZE - ret, |
| " - R%d(0x%x) mask 0x%x", |
| w->reg, w->reg, w->mask << w->shift); |
| |
| ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n"); |
| |
| if (w->sname) |
| ret += snprintf(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(w, p->node[rdir])) |
| continue; |
| |
| if (!p->connect) |
| continue; |
| |
| ret += snprintf(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) |
| return; |
| |
| dapm->debugfs_dapm = debugfs_create_dir("dapm", parent); |
| |
| if (!dapm->debugfs_dapm) { |
| dev_warn(dapm->dev, |
| "ASoC: Failed to create DAPM debugfs directory\n"); |
| return; |
| } |
| |
| d = debugfs_create_file("bias_level", 0444, |
| dapm->debugfs_dapm, dapm, |
| &dapm_bias_fops); |
| if (!d) |
| dev_warn(dapm->dev, |
| "ASoC: Failed to create bias level debugfs file\n"); |
| } |
| |
| 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 (!d) |
| dev_warn(w->dapm->dev, |
| "ASoC: Failed to create %s debugfs file\n", |
| w->name); |
| } |
| |
| 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_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(dapm_widget, 0444, dapm_widget_show, NULL); |
| |
| 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); |
| /* |
| * 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; |
| } |
| |
| 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); |
| |
| 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); |
| } |
| |
| w->connected = status; |
| if (status == 0) |
| w->force = 0; |
| |
| return 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_INIT); |
| 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_INIT); |
| 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 = kzalloc(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; |
| |
| |