#define DPCM_MAX_BE_USERS 8
+#ifdef CONFIG_DEBUG_FS
+static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
+{
+ switch (state) {
+ case SND_SOC_DPCM_STATE_NEW:
+ return "new";
+ case SND_SOC_DPCM_STATE_OPEN:
+ return "open";
+ case SND_SOC_DPCM_STATE_HW_PARAMS:
+ return "hw_params";
+ case SND_SOC_DPCM_STATE_PREPARE:
+ return "prepare";
+ case SND_SOC_DPCM_STATE_START:
+ return "start";
+ case SND_SOC_DPCM_STATE_STOP:
+ return "stop";
+ case SND_SOC_DPCM_STATE_SUSPEND:
+ return "suspend";
+ case SND_SOC_DPCM_STATE_PAUSED:
+ return "paused";
+ case SND_SOC_DPCM_STATE_HW_FREE:
+ return "hw_free";
+ case SND_SOC_DPCM_STATE_CLOSE:
+ return "close";
+ }
+
+ return "unknown";
+}
+
+static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
+ int stream, char *buf, size_t size)
+{
+ struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
+ struct snd_soc_dpcm *dpcm;
+ ssize_t offset = 0;
+ unsigned long flags;
+
+ /* FE state */
+ offset += snprintf(buf + offset, size - offset,
+ "[%s - %s]\n", fe->dai_link->name,
+ stream ? "Capture" : "Playback");
+
+ offset += snprintf(buf + offset, size - offset, "State: %s\n",
+ dpcm_state_string(fe->dpcm[stream].state));
+
+ if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
+ (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
+ offset += snprintf(buf + offset, size - offset,
+ "Hardware Params: "
+ "Format = %s, Channels = %d, Rate = %d\n",
+ snd_pcm_format_name(params_format(params)),
+ params_channels(params),
+ params_rate(params));
+
+ /* BEs state */
+ offset += snprintf(buf + offset, size - offset, "Backends:\n");
+
+ if (list_empty(&fe->dpcm[stream].be_clients)) {
+ offset += snprintf(buf + offset, size - offset,
+ " No active DSP links\n");
+ goto out;
+ }
+
+ spin_lock_irqsave(&fe->card->dpcm_lock, flags);
+ for_each_dpcm_be(fe, stream, dpcm) {
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ params = &dpcm->hw_params;
+
+ offset += snprintf(buf + offset, size - offset,
+ "- %s\n", be->dai_link->name);
+
+ offset += snprintf(buf + offset, size - offset,
+ " State: %s\n",
+ dpcm_state_string(be->dpcm[stream].state));
+
+ if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
+ (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
+ offset += snprintf(buf + offset, size - offset,
+ " Hardware Params: "
+ "Format = %s, Channels = %d, Rate = %d\n",
+ snd_pcm_format_name(params_format(params)),
+ params_channels(params),
+ params_rate(params));
+ }
+ spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
+out:
+ return offset;
+}
+
+static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct snd_soc_pcm_runtime *fe = file->private_data;
+ ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
+ int stream;
+ char *buf;
+
+ buf = kmalloc(out_count, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ for_each_pcm_streams(stream)
+ if (snd_soc_dai_stream_valid(fe->cpu_dai, stream))
+ offset += dpcm_show_state(fe, stream,
+ buf + offset,
+ out_count - offset);
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
+
+ kfree(buf);
+ return ret;
+}
+
+static const struct file_operations dpcm_state_fops = {
+ .open = simple_open,
+ .read = dpcm_state_read_file,
+ .llseek = default_llseek,
+};
+
+void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
+{
+ if (!rtd->dai_link)
+ return;
+
+ if (!rtd->dai_link->dynamic)
+ return;
+
+ if (!rtd->card->debugfs_card_root)
+ return;
+
+ rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
+ rtd->card->debugfs_card_root);
+
+ debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
+ rtd, &dpcm_state_fops);
+}
+
+static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
+{
+ char *name;
+
+ name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
+ stream ? "capture" : "playback");
+ if (name) {
+ dpcm->debugfs_state = debugfs_create_dir(
+ name, dpcm->fe->debugfs_dpcm_root);
+ debugfs_create_u32("state", 0644, dpcm->debugfs_state,
+ &dpcm->state);
+ kfree(name);
+ }
+}
+
+static void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
+{
+ debugfs_remove_recursive(dpcm->debugfs_state);
+}
+
+#else
+static inline void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm,
+ int stream)
+{
+}
+
+static inline void dpcm_remove_debugfs_state(struct snd_soc_dpcm *dpcm)
+{
+}
+#endif
+
static int soc_rtd_startup(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_substream *substream)
{
return 0;
}
+static void snd_soc_runtime_action(struct snd_soc_pcm_runtime *rtd,
+ int stream, int action)
+{
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai;
+ int i;
+
+ lockdep_assert_held(&rtd->card->pcm_mutex);
+
+ cpu_dai->stream_active[stream] += action;
+ for_each_rtd_codec_dai(rtd, i, codec_dai)
+ codec_dai->stream_active[stream] += action;
+
+ cpu_dai->active += action;
+ cpu_dai->component->active += action;
+ for_each_rtd_codec_dai(rtd, i, codec_dai) {
+ codec_dai->active += action;
+ codec_dai->component->active += action;
+ }
+}
+
/**
* snd_soc_runtime_activate() - Increment active count for PCM runtime components
* @rtd: ASoC PCM runtime that is activated
*/
void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
{
- struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
- struct snd_soc_dai *codec_dai;
- int i;
-
- lockdep_assert_held(&rtd->card->pcm_mutex);
-
- if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
- cpu_dai->playback_active++;
- for_each_rtd_codec_dai(rtd, i, codec_dai)
- codec_dai->playback_active++;
- } else {
- cpu_dai->capture_active++;
- for_each_rtd_codec_dai(rtd, i, codec_dai)
- codec_dai->capture_active++;
- }
-
- cpu_dai->active++;
- cpu_dai->component->active++;
- for_each_rtd_codec_dai(rtd, i, codec_dai) {
- codec_dai->active++;
- codec_dai->component->active++;
- }
+ snd_soc_runtime_action(rtd, stream, 1);
}
/**
*/
void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
{
- struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
- struct snd_soc_dai *codec_dai;
- int i;
-
- lockdep_assert_held(&rtd->card->pcm_mutex);
-
- if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
- cpu_dai->playback_active--;
- for_each_rtd_codec_dai(rtd, i, codec_dai)
- codec_dai->playback_active--;
- } else {
- cpu_dai->capture_active--;
- for_each_rtd_codec_dai(rtd, i, codec_dai)
- codec_dai->capture_active--;
- }
-
- cpu_dai->active--;
- cpu_dai->component->active--;
- for_each_rtd_codec_dai(rtd, i, codec_dai) {
- codec_dai->component->active--;
- codec_dai->active--;
- }
+ snd_soc_runtime_action(rtd, stream, -1);
}
/**
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai;
+ struct snd_soc_pcm_stream *pcm_codec, *pcm_cpu;
+ int stream = substream->stream;
int i;
unsigned int bits = 0, cpu_bits;
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- for_each_rtd_codec_dai(rtd, i, codec_dai) {
- if (codec_dai->driver->playback.sig_bits == 0) {
- bits = 0;
- break;
- }
- bits = max(codec_dai->driver->playback.sig_bits, bits);
- }
- cpu_bits = cpu_dai->driver->playback.sig_bits;
- } else {
- for_each_rtd_codec_dai(rtd, i, codec_dai) {
- if (codec_dai->driver->capture.sig_bits == 0) {
- bits = 0;
- break;
- }
- bits = max(codec_dai->driver->capture.sig_bits, bits);
+ for_each_rtd_codec_dai(rtd, i, codec_dai) {
+ pcm_codec = snd_soc_dai_get_pcm_stream(codec_dai, stream);
+
+ if (pcm_codec->sig_bits == 0) {
+ bits = 0;
+ break;
}
- cpu_bits = cpu_dai->driver->capture.sig_bits;
+ bits = max(pcm_codec->sig_bits, bits);
}
+ pcm_cpu = snd_soc_dai_get_pcm_stream(cpu_dai, stream);
+ cpu_bits = pcm_cpu->sig_bits;
+
soc_pcm_set_msb(substream, bits);
soc_pcm_set_msb(substream, cpu_bits);
}
struct snd_pcm_hardware *hw = &runtime->hw;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai;
- struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
- struct snd_soc_dai_driver *codec_dai_drv;
struct snd_soc_pcm_stream *codec_stream;
struct snd_soc_pcm_stream *cpu_stream;
unsigned int chan_min = 0, chan_max = UINT_MAX;
unsigned int rate_min = 0, rate_max = UINT_MAX;
unsigned int rates = UINT_MAX;
u64 formats = ULLONG_MAX;
+ int stream = substream->stream;
int i;
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- cpu_stream = &cpu_dai_drv->playback;
- else
- cpu_stream = &cpu_dai_drv->capture;
+ cpu_stream = snd_soc_dai_get_pcm_stream(rtd->cpu_dai, stream);
/* first calculate min/max only for CODECs in the DAI link */
for_each_rtd_codec_dai(rtd, i, codec_dai) {
substream->stream))
continue;
- codec_dai_drv = codec_dai->driver;
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- codec_stream = &codec_dai_drv->playback;
- else
- codec_stream = &codec_dai_drv->capture;
+ codec_stream = snd_soc_dai_get_pcm_stream(codec_dai, stream);
+
chan_min = max(chan_min, codec_stream->channels_min);
chan_max = min(chan_max, codec_stream->channels_max);
rate_min = max(rate_min, codec_stream->rate_min);
hw->rate_max = min_not_zero(hw->rate_max, rate_max);
}
-static int soc_pcm_components_open(struct snd_pcm_substream *substream,
- struct snd_soc_component **last)
+static int soc_pcm_components_open(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_component *last = NULL;
struct snd_soc_component *component;
int i, ret = 0;
for_each_rtd_components(rtd, i, component) {
- *last = component;
+ last = component;
ret = snd_soc_component_module_get_when_open(component);
if (ret < 0) {
dev_err(component->dev,
"ASoC: can't get module %s\n",
component->name);
- return ret;
+ break;
}
ret = snd_soc_component_open(component, substream);
if (ret < 0) {
+ snd_soc_component_module_put_when_close(component);
dev_err(component->dev,
"ASoC: can't open component %s: %d\n",
component->name, ret);
- return ret;
+ break;
}
}
- *last = NULL;
- return 0;
+
+ if (ret < 0) {
+ /* rollback on error */
+ for_each_rtd_components(rtd, i, component) {
+ if (component == last)
+ break;
+
+ snd_soc_component_close(component, substream);
+ snd_soc_component_module_put_when_close(component);
+ }
+ }
+
+ return ret;
}
-static int soc_pcm_components_close(struct snd_pcm_substream *substream,
- struct snd_soc_component *last)
+static int soc_pcm_components_close(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component;
- int i, ret = 0;
+ int i, r, ret = 0;
for_each_rtd_components(rtd, i, component) {
- if (component == last)
- break;
+ r = snd_soc_component_close(component, substream);
+ if (r < 0)
+ ret = r; /* use last ret */
- ret |= snd_soc_component_close(component, substream);
snd_soc_component_module_put_when_close(component);
}
return ret;
}
+/*
+ * Called by ALSA when a PCM substream is closed. Private data can be
+ * freed here. The cpu DAI, codec DAI, machine and components are also
+ * shutdown.
+ */
+static int soc_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_component *component;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai;
+ int i;
+
+ mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+
+ snd_soc_runtime_deactivate(rtd, substream->stream);
+
+ snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
+
+ snd_soc_dai_shutdown(cpu_dai, substream);
+
+ for_each_rtd_codec_dai(rtd, i, codec_dai)
+ snd_soc_dai_shutdown(codec_dai, substream);
+
+ soc_rtd_shutdown(rtd, substream);
+
+ soc_pcm_components_close(substream);
+
+ snd_soc_dapm_stream_stop(rtd, substream->stream);
+
+ mutex_unlock(&rtd->card->pcm_mutex);
+
+ for_each_rtd_components(rtd, i, component) {
+ pm_runtime_mark_last_busy(component->dev);
+ pm_runtime_put_autosuspend(component->dev);
+ }
+
+ for_each_rtd_components(rtd, i, component)
+ if (!component->active)
+ pinctrl_pm_select_sleep_state(component->dev);
+
+ return 0;
+}
+
/*
* Called by ALSA when a PCM substream is opened, the runtime->hw record is
* then initialized and any private data can be allocated. This also calls
mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
+ ret = soc_pcm_components_open(substream);
+ if (ret < 0)
+ goto component_err;
+
+ ret = soc_rtd_startup(rtd, substream);
+ if (ret < 0) {
+ pr_err("ASoC: %s startup failed: %d\n",
+ rtd->dai_link->name, ret);
+ goto rtd_startup_err;
+ }
+
/* startup the audio subsystem */
ret = snd_soc_dai_startup(cpu_dai, substream);
if (ret < 0) {
dev_err(cpu_dai->dev, "ASoC: can't open interface %s: %d\n",
cpu_dai->name, ret);
- goto out;
+ goto cpu_dai_err;
}
- ret = soc_pcm_components_open(substream, &component);
- if (ret < 0)
- goto component_err;
-
for_each_rtd_codec_dai(rtd, i, codec_dai) {
ret = snd_soc_dai_startup(codec_dai, substream);
if (ret < 0) {
dev_err(codec_dai->dev,
"ASoC: can't open codec %s: %d\n",
codec_dai->name, ret);
- goto codec_dai_err;
+ goto config_err;
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
codec_dai->rx_mask = 0;
}
- ret = soc_rtd_startup(rtd, substream);
- if (ret < 0) {
- pr_err("ASoC: %s startup failed: %d\n",
- rtd->dai_link->name, ret);
- goto machine_err;
- }
-
/* Dynamic PCM DAI links compat checks use dynamic capabilities */
if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
goto dynamic;
return 0;
config_err:
- soc_rtd_shutdown(rtd, substream);
-
-machine_err:
- i = rtd->num_codecs;
-
-codec_dai_err:
- for_each_rtd_codec_dai_rollback(rtd, i, codec_dai)
+ for_each_rtd_codec_dai(rtd, i, codec_dai)
snd_soc_dai_shutdown(codec_dai, substream);
+cpu_dai_err:
+ snd_soc_dai_shutdown(cpu_dai, substream);
+ soc_rtd_shutdown(rtd, substream);
+rtd_startup_err:
+ soc_pcm_components_close(substream);
component_err:
- soc_pcm_components_close(substream, component);
-
- snd_soc_dai_shutdown(cpu_dai, substream);
-out:
mutex_unlock(&rtd->card->pcm_mutex);
for_each_rtd_components(rtd, i, component) {
*/
}
-/*
- * Called by ALSA when a PCM substream is closed. Private data can be
- * freed here. The cpu DAI, codec DAI, machine and components are also
- * shutdown.
- */
-static int soc_pcm_close(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct snd_soc_component *component;
- struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
- struct snd_soc_dai *codec_dai;
- int i;
-
- mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
-
- snd_soc_runtime_deactivate(rtd, substream->stream);
-
- /* clear the corresponding DAIs rate when inactive */
- if (!cpu_dai->active)
- cpu_dai->rate = 0;
-
- for_each_rtd_codec_dai(rtd, i, codec_dai) {
- if (!codec_dai->active)
- codec_dai->rate = 0;
- }
-
- snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
-
- snd_soc_dai_shutdown(cpu_dai, substream);
-
- for_each_rtd_codec_dai(rtd, i, codec_dai)
- snd_soc_dai_shutdown(codec_dai, substream);
-
- soc_rtd_shutdown(rtd, substream);
-
- soc_pcm_components_close(substream, NULL);
-
- snd_soc_dapm_stream_stop(rtd, substream->stream);
-
- mutex_unlock(&rtd->card->pcm_mutex);
-
- for_each_rtd_components(rtd, i, component) {
- pm_runtime_mark_last_busy(component->dev);
- pm_runtime_put_autosuspend(component->dev);
- }
-
- for_each_rtd_components(rtd, i, component)
- if (!component->active)
- pinctrl_pm_select_sleep_state(component->dev);
-
- return 0;
-}
-
/*
* Called by ALSA when the PCM substream is prepared, can set format, sample
* rate, etc. This function is non atomic and can be called multiple times,
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component;
- int i, ret = 0;
+ int i, r, ret = 0;
for_each_rtd_components(rtd, i, component) {
if (component == last)
break;
- ret |= snd_soc_component_hw_free(component, substream);
+ r = snd_soc_component_hw_free(component, substream);
+ if (r < 0)
+ ret = r; /* use last ret */
}
return ret;
/* apply codec digital mute */
for_each_rtd_codec_dai(rtd, i, codec_dai) {
- if ((playback && codec_dai->playback_active == 1) ||
- (!playback && codec_dai->capture_active == 1))
+ int playback_active = codec_dai->stream_active[SNDRV_PCM_STREAM_PLAYBACK];
+ int capture_active = codec_dai->stream_active[SNDRV_PCM_STREAM_CAPTURE];
+
+ if ((playback && playback_active == 1) ||
+ (!playback && capture_active == 1))
snd_soc_dai_digital_mute(codec_dai, 1,
substream->stream);
}
{
struct snd_soc_dpcm *dpcm;
unsigned long flags;
-#ifdef CONFIG_DEBUG_FS
- char *name;
-#endif
/* only add new dpcms */
for_each_dpcm_be(fe, stream, dpcm) {
list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients);
spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
- dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
- stream ? "capture" : "playback", fe->dai_link->name,
- stream ? "<-" : "->", be->dai_link->name);
-
-#ifdef CONFIG_DEBUG_FS
- name = kasprintf(GFP_KERNEL, "%s:%s", be->dai_link->name,
- stream ? "capture" : "playback");
- if (name) {
- dpcm->debugfs_state = debugfs_create_dir(name,
- fe->debugfs_dpcm_root);
- debugfs_create_u32("state", 0644, dpcm->debugfs_state,
- &dpcm->state);
- kfree(name);
- }
-#endif
+ dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
+ stream ? "capture" : "playback", fe->dai_link->name,
+ stream ? "<-" : "->", be->dai_link->name);
+
+ dpcm_create_debugfs_state(dpcm, stream);
+
return 1;
}
/* BEs still alive need new FE */
dpcm_be_reparent(fe, dpcm->be, stream);
-#ifdef CONFIG_DEBUG_FS
- debugfs_remove_recursive(dpcm->debugfs_state);
-#endif
+ dpcm_remove_debugfs_state(dpcm);
+
spin_lock_irqsave(&fe->card->dpcm_lock, flags);
list_del(&dpcm->list_be);
list_del(&dpcm->list_fe);
struct snd_soc_dapm_widget *widget, int stream)
{
struct snd_soc_pcm_runtime *be;
+ struct snd_soc_dapm_widget *w;
struct snd_soc_dai *dai;
int i;
dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
- if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
- for_each_card_rtds(card, be) {
+ for_each_card_rtds(card, be) {
- if (!be->dai_link->no_pcm)
- continue;
-
- dev_dbg(card->dev, "ASoC: try BE : %s\n",
- be->cpu_dai->playback_widget ?
- be->cpu_dai->playback_widget->name : "(not set)");
-
- if (be->cpu_dai->playback_widget == widget)
- return be;
+ if (!be->dai_link->no_pcm)
+ continue;
- for_each_rtd_codec_dai(be, i, dai) {
- if (dai->playback_widget == widget)
- return be;
- }
- }
- } else {
+ w = snd_soc_dai_get_widget(be->cpu_dai, stream);
- for_each_card_rtds(card, be) {
+ dev_dbg(card->dev, "ASoC: try BE : %s\n",
+ w ? w->name : "(not set)");
- if (!be->dai_link->no_pcm)
- continue;
+ if (w == widget)
+ return be;
- dev_dbg(card->dev, "ASoC: try BE %s\n",
- be->cpu_dai->capture_widget ?
- be->cpu_dai->capture_widget->name : "(not set)");
+ for_each_rtd_codec_dai(be, i, dai) {
+ w = snd_soc_dai_get_widget(dai, stream);
- if (be->cpu_dai->capture_widget == widget)
+ if (w == widget)
return be;
-
- for_each_rtd_codec_dai(be, i, dai) {
- if (dai->capture_widget == widget)
- return be;
- }
}
}
- /* dai link name and stream name set correctly ? */
- dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
- stream ? "capture" : "playback", widget->name);
+ /* Widget provided is not a BE */
return NULL;
}
-static inline struct snd_soc_dapm_widget *
- dai_get_widget(struct snd_soc_dai *dai, int stream)
-{
- if (stream == SNDRV_PCM_STREAM_PLAYBACK)
- return dai->playback_widget;
- else
- return dai->capture_widget;
-}
-
static int widget_in_list(struct snd_soc_dapm_widget_list *list,
struct snd_soc_dapm_widget *widget)
{
+ struct snd_soc_dapm_widget *w;
int i;
- for (i = 0; i < list->num_widgets; i++) {
- if (widget == list->widgets[i])
+ for_each_dapm_widgets(list, i, w)
+ if (widget == w)
return 1;
- }
return 0;
}
{
struct snd_soc_card *card = widget->dapm->card;
struct snd_soc_pcm_runtime *rtd;
- struct snd_soc_dai *dai;
- int i;
-
- if (dir == SND_SOC_DAPM_DIR_OUT) {
- for_each_card_rtds(card, rtd) {
- if (!rtd->dai_link->no_pcm)
- continue;
-
- if (rtd->cpu_dai->playback_widget == widget)
- return true;
-
- for_each_rtd_codec_dai(rtd, i, dai) {
- if (dai->playback_widget == widget)
- return true;
- }
- }
- } else { /* SND_SOC_DAPM_DIR_IN */
- for_each_card_rtds(card, rtd) {
- if (!rtd->dai_link->no_pcm)
- continue;
+ int stream;
- if (rtd->cpu_dai->capture_widget == widget)
- return true;
+ /* adjust dir to stream */
+ if (dir == SND_SOC_DAPM_DIR_OUT)
+ stream = SNDRV_PCM_STREAM_PLAYBACK;
+ else
+ stream = SNDRV_PCM_STREAM_CAPTURE;
- for_each_rtd_codec_dai(rtd, i, dai) {
- if (dai->capture_widget == widget)
- return true;
- }
- }
- }
+ rtd = dpcm_get_be(card, widget, stream);
+ if (rtd)
+ return true;
return false;
}
return paths;
}
+void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
+{
+ snd_soc_dapm_dai_free_widgets(list);
+}
+
static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
struct snd_soc_dapm_widget_list **list_)
{
unsigned int i;
/* is there a valid CPU DAI widget for this BE */
- widget = dai_get_widget(dpcm->be->cpu_dai, stream);
+ widget = snd_soc_dai_get_widget(dpcm->be->cpu_dai, stream);
/* prune the BE if it's no longer in our active list */
if (widget && widget_in_list(list, widget))
/* is there a valid CODEC DAI widget for this BE */
do_prune = 1;
for_each_rtd_codec_dai(dpcm->be, i, dai) {
- widget = dai_get_widget(dai, stream);
+ widget = snd_soc_dai_get_widget(dai, stream);
/* prune the BE if it's no longer in our active list */
if (widget && widget_in_list(list, widget))
struct snd_soc_card *card = fe->card;
struct snd_soc_dapm_widget_list *list = *list_;
struct snd_soc_pcm_runtime *be;
+ struct snd_soc_dapm_widget *widget;
int i, new = 0, err;
/* Create any new FE <--> BE connections */
- for (i = 0; i < list->num_widgets; i++) {
+ for_each_dapm_widgets(list, i, widget) {
- switch (list->widgets[i]->id) {
+ switch (widget->id) {
case snd_soc_dapm_dai_in:
if (stream != SNDRV_PCM_STREAM_PLAYBACK)
continue;
}
/* is there a valid BE rtd for this widget */
- be = dpcm_get_be(card, list->widgets[i], stream);
+ be = dpcm_get_be(card, widget, stream);
if (!be) {
dev_err(fe->dev, "ASoC: no BE found for %s\n",
- list->widgets[i]->name);
+ widget->name);
continue;
}
err = dpcm_be_connect(fe, be, stream);
if (err < 0) {
dev_err(fe->dev, "ASoC: can't connect %s\n",
- list->widgets[i]->name);
+ widget->name);
break;
} else if (err == 0) /* already connected */
continue;
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
- struct snd_soc_dai_driver *codec_dai_drv;
struct snd_soc_pcm_stream *codec_stream;
int i;
if (!snd_soc_dai_stream_valid(dai, stream))
continue;
- codec_dai_drv = dai->driver;
- if (stream == SNDRV_PCM_STREAM_PLAYBACK)
- codec_stream = &codec_dai_drv->playback;
- else
- codec_stream = &codec_dai_drv->capture;
+ codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
*formats &= codec_stream->formats;
}
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
- struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
- struct snd_soc_dai_driver *codec_dai_drv;
struct snd_soc_pcm_stream *codec_stream;
struct snd_soc_pcm_stream *cpu_stream;
- if (stream == SNDRV_PCM_STREAM_PLAYBACK)
- cpu_stream = &cpu_dai_drv->playback;
- else
- cpu_stream = &cpu_dai_drv->capture;
+ cpu_stream = snd_soc_dai_get_pcm_stream(be->cpu_dai, stream);
*channels_min = max(*channels_min, cpu_stream->channels_min);
*channels_max = min(*channels_max, cpu_stream->channels_max);
* DAIs connected to a single CPU DAI, use CPU DAI's directly
*/
if (be->num_codecs == 1) {
- codec_dai_drv = be->codec_dais[0]->driver;
-
- if (stream == SNDRV_PCM_STREAM_PLAYBACK)
- codec_stream = &codec_dai_drv->playback;
- else
- codec_stream = &codec_dai_drv->capture;
+ codec_stream = snd_soc_dai_get_pcm_stream(be->codec_dais[0], stream);
*channels_min = max(*channels_min,
codec_stream->channels_min);
for_each_dpcm_be(fe, stream, dpcm) {
struct snd_soc_pcm_runtime *be = dpcm->be;
- struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
- struct snd_soc_dai_driver *codec_dai_drv;
struct snd_soc_pcm_stream *codec_stream;
struct snd_soc_pcm_stream *cpu_stream;
struct snd_soc_dai *dai;
int i;
- if (stream == SNDRV_PCM_STREAM_PLAYBACK)
- cpu_stream = &cpu_dai_drv->playback;
- else
- cpu_stream = &cpu_dai_drv->capture;
+ cpu_stream = snd_soc_dai_get_pcm_stream(be->cpu_dai, stream);
*rate_min = max(*rate_min, cpu_stream->rate_min);
*rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
if (!snd_soc_dai_stream_valid(dai, stream))
continue;
- codec_dai_drv = dai->driver;
- if (stream == SNDRV_PCM_STREAM_PLAYBACK)
- codec_stream = &codec_dai_drv->playback;
- else
- codec_stream = &codec_dai_drv->capture;
+ codec_stream = snd_soc_dai_get_pcm_stream(dai, stream);
*rate_min = max(*rate_min, codec_stream->rate_min);
*rate_max = min_not_zero(*rate_max,
return ret;
}
-static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
-{
- int ret;
-
- dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
- ret = dpcm_run_update_startup(fe, stream);
- if (ret < 0)
- dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
- dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
-
- return ret;
-}
-
-static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
-{
- int ret;
-
- dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
- ret = dpcm_run_update_shutdown(fe, stream);
- if (ret < 0)
- dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
- dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
-
- return ret;
-}
-
static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
{
struct snd_soc_dapm_widget_list *list;
+ int stream;
int count, paths;
+ int ret;
if (!fe->dai_link->dynamic)
return 0;
dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
new ? "new" : "old", fe->dai_link->name);
- /* skip if FE doesn't have playback capability */
- if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK) ||
- !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_PLAYBACK))
- goto capture;
-
- /* skip if FE isn't currently playing */
- if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
- goto capture;
-
- paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
- if (paths < 0) {
- dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
- fe->dai_link->name, "playback");
- return paths;
- }
-
- /* update any playback paths */
- count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
- if (count) {
- if (new)
- dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
- else
- dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
-
- dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK);
- dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
- }
+ for_each_pcm_streams(stream) {
- dpcm_path_put(&list);
+ /* skip if FE doesn't have playback/capture capability */
+ if (!snd_soc_dai_stream_valid(fe->cpu_dai, stream) ||
+ !snd_soc_dai_stream_valid(fe->codec_dai, stream))
+ continue;
-capture:
- /* skip if FE doesn't have capture capability */
- if (!snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE) ||
- !snd_soc_dai_stream_valid(fe->codec_dai, SNDRV_PCM_STREAM_CAPTURE))
- return 0;
+ /* skip if FE isn't currently playing/capturing */
+ if (!fe->cpu_dai->stream_active[stream] ||
+ !fe->codec_dai->stream_active[stream])
+ continue;
- /* skip if FE isn't currently capturing */
- if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
- return 0;
+ paths = dpcm_path_get(fe, stream, &list);
+ if (paths < 0) {
+ dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
+ fe->dai_link->name,
+ stream == SNDRV_PCM_STREAM_PLAYBACK ?
+ "playback" : "capture");
+ return paths;
+ }
- paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
- if (paths < 0) {
- dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
- fe->dai_link->name, "capture");
- return paths;
- }
+ /* update any playback/capture paths */
+ count = dpcm_process_paths(fe, stream, &list, new);
+ if (count) {
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
+ if (new)
+ ret = dpcm_run_update_startup(fe, stream);
+ else
+ ret = dpcm_run_update_shutdown(fe, stream);
+ if (ret < 0)
+ dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
- /* update any old capture paths */
- count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
- if (count) {
- if (new)
- dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
- else
- dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE);
+ dpcm_clear_pending_state(fe, stream);
+ dpcm_be_disconnect(fe, stream);
+ }
- dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE);
- dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE);
+ dpcm_path_put(&list);
}
- dpcm_path_put(&list);
-
return 0;
}
mutex_unlock(&card->mutex);
return ret;
}
-int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute)
-{
- struct snd_soc_dpcm *dpcm;
- struct snd_soc_dai *dai;
-
- for_each_dpcm_be(fe, SNDRV_PCM_STREAM_PLAYBACK, dpcm) {
-
- struct snd_soc_pcm_runtime *be = dpcm->be;
- int i;
-
- if (be->dai_link->ignore_suspend)
- continue;
-
- for_each_rtd_codec_dai(be, i, dai) {
- struct snd_soc_dai_driver *drv = dai->driver;
-
- dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
- be->dai_link->name);
-
- if (drv->ops && drv->ops->digital_mute &&
- dai->playback_active)
- drv->ops->digital_mute(dai, mute);
- }
- }
-
- return 0;
-}
static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
{
ret = dpcm_path_get(fe, stream, &list);
if (ret < 0) {
- mutex_unlock(&fe->card->mutex);
- return ret;
+ goto open_end;
} else if (ret == 0) {
dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
fe->dai_link->name, stream ? "capture" : "playback");
dpcm_clear_pending_state(fe, stream);
dpcm_path_put(&list);
+open_end:
mutex_unlock(&fe->card->mutex);
return ret;
}
capture = rtd->dai_link->dpcm_capture;
} else {
/* Adapt stream for codec2codec links */
- struct snd_soc_pcm_stream *cpu_capture = rtd->dai_link->params ?
- &cpu_dai->driver->playback : &cpu_dai->driver->capture;
- struct snd_soc_pcm_stream *cpu_playback = rtd->dai_link->params ?
- &cpu_dai->driver->capture : &cpu_dai->driver->playback;
+ int cpu_capture = rtd->dai_link->params ?
+ SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
+ int cpu_playback = rtd->dai_link->params ?
+ SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
for_each_rtd_codec_dai(rtd, i, codec_dai) {
if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
- snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
+ snd_soc_dai_stream_valid(cpu_dai, cpu_playback))
playback = 1;
if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
- snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
+ snd_soc_dai_stream_valid(cpu_dai, cpu_capture))
capture = 1;
}
-
- capture = capture && cpu_capture->channels_min;
- playback = playback && cpu_playback->channels_min;
}
if (rtd->dai_link->playback_only) {
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
-/* get the BE runtime state */
-enum snd_soc_dpcm_state
- snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream)
-{
- return be->dpcm[stream].state;
-}
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state);
-
-/* set the BE runtime state */
-void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be,
- int stream, enum snd_soc_dpcm_state state)
-{
- be->dpcm[stream].state = state;
-}
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state);
-
-/*
- * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
- * are not running, paused or suspended for the specified stream direction.
- */
-int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
- struct snd_soc_pcm_runtime *be, int stream)
+static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
+ struct snd_soc_pcm_runtime *be,
+ int stream,
+ const enum snd_soc_dpcm_state *states,
+ int num_states)
{
struct snd_soc_dpcm *dpcm;
int state;
int ret = 1;
unsigned long flags;
+ int i;
spin_lock_irqsave(&fe->card->dpcm_lock, flags);
for_each_dpcm_fe(be, stream, dpcm) {
continue;
state = dpcm->fe->dpcm[stream].state;
- if (state == SND_SOC_DPCM_STATE_START ||
- state == SND_SOC_DPCM_STATE_PAUSED ||
- state == SND_SOC_DPCM_STATE_SUSPEND) {
- ret = 0;
- break;
+ for (i = 0; i < num_states; i++) {
+ if (state == states[i]) {
+ ret = 0;
+ break;
+ }
}
}
spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
- /* it's safe to free/stop this BE DAI */
+ /* it's safe to do this BE DAI */
return ret;
}
+
+/*
+ * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
+ * are not running, paused or suspended for the specified stream direction.
+ */
+int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
+ struct snd_soc_pcm_runtime *be, int stream)
+{
+ const enum snd_soc_dpcm_state state[] = {
+ SND_SOC_DPCM_STATE_START,
+ SND_SOC_DPCM_STATE_PAUSED,
+ SND_SOC_DPCM_STATE_SUSPEND,
+ };
+
+ return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
+}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
/*
int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
struct snd_soc_pcm_runtime *be, int stream)
{
- struct snd_soc_dpcm *dpcm;
- int state;
- int ret = 1;
- unsigned long flags;
-
- spin_lock_irqsave(&fe->card->dpcm_lock, flags);
- for_each_dpcm_fe(be, stream, dpcm) {
-
- if (dpcm->fe == fe)
- continue;
+ const enum snd_soc_dpcm_state state[] = {
+ SND_SOC_DPCM_STATE_START,
+ SND_SOC_DPCM_STATE_PAUSED,
+ SND_SOC_DPCM_STATE_SUSPEND,
+ SND_SOC_DPCM_STATE_PREPARE,
+ };
- state = dpcm->fe->dpcm[stream].state;
- if (state == SND_SOC_DPCM_STATE_START ||
- state == SND_SOC_DPCM_STATE_PAUSED ||
- state == SND_SOC_DPCM_STATE_SUSPEND ||
- state == SND_SOC_DPCM_STATE_PREPARE) {
- ret = 0;
- break;
- }
- }
- spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
-
- /* it's safe to change hw_params */
- return ret;
+ return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
-
-#ifdef CONFIG_DEBUG_FS
-static const char *dpcm_state_string(enum snd_soc_dpcm_state state)
-{
- switch (state) {
- case SND_SOC_DPCM_STATE_NEW:
- return "new";
- case SND_SOC_DPCM_STATE_OPEN:
- return "open";
- case SND_SOC_DPCM_STATE_HW_PARAMS:
- return "hw_params";
- case SND_SOC_DPCM_STATE_PREPARE:
- return "prepare";
- case SND_SOC_DPCM_STATE_START:
- return "start";
- case SND_SOC_DPCM_STATE_STOP:
- return "stop";
- case SND_SOC_DPCM_STATE_SUSPEND:
- return "suspend";
- case SND_SOC_DPCM_STATE_PAUSED:
- return "paused";
- case SND_SOC_DPCM_STATE_HW_FREE:
- return "hw_free";
- case SND_SOC_DPCM_STATE_CLOSE:
- return "close";
- }
-
- return "unknown";
-}
-
-static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
- int stream, char *buf, size_t size)
-{
- struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params;
- struct snd_soc_dpcm *dpcm;
- ssize_t offset = 0;
- unsigned long flags;
-
- /* FE state */
- offset += scnprintf(buf + offset, size - offset,
- "[%s - %s]\n", fe->dai_link->name,
- stream ? "Capture" : "Playback");
-
- offset += scnprintf(buf + offset, size - offset, "State: %s\n",
- dpcm_state_string(fe->dpcm[stream].state));
-
- if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
- (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
- offset += scnprintf(buf + offset, size - offset,
- "Hardware Params: "
- "Format = %s, Channels = %d, Rate = %d\n",
- snd_pcm_format_name(params_format(params)),
- params_channels(params),
- params_rate(params));
-
- /* BEs state */
- offset += scnprintf(buf + offset, size - offset, "Backends:\n");
-
- if (list_empty(&fe->dpcm[stream].be_clients)) {
- offset += scnprintf(buf + offset, size - offset,
- " No active DSP links\n");
- goto out;
- }
-
- spin_lock_irqsave(&fe->card->dpcm_lock, flags);
- for_each_dpcm_be(fe, stream, dpcm) {
- struct snd_soc_pcm_runtime *be = dpcm->be;
- params = &dpcm->hw_params;
-
- offset += scnprintf(buf + offset, size - offset,
- "- %s\n", be->dai_link->name);
-
- offset += scnprintf(buf + offset, size - offset,
- " State: %s\n",
- dpcm_state_string(be->dpcm[stream].state));
-
- if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
- (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
- offset += scnprintf(buf + offset, size - offset,
- " Hardware Params: "
- "Format = %s, Channels = %d, Rate = %d\n",
- snd_pcm_format_name(params_format(params)),
- params_channels(params),
- params_rate(params));
- }
- spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);
-out:
- return offset;
-}
-
-static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- struct snd_soc_pcm_runtime *fe = file->private_data;
- ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0;
- char *buf;
-
- buf = kmalloc(out_count, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
- offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
- buf + offset, out_count - offset);
-
- if (snd_soc_dai_stream_valid(fe->cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
- offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE,
- buf + offset, out_count - offset);
-
- ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset);
-
- kfree(buf);
- return ret;
-}
-
-static const struct file_operations dpcm_state_fops = {
- .open = simple_open,
- .read = dpcm_state_read_file,
- .llseek = default_llseek,
-};
-
-void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
-{
- if (!rtd->dai_link)
- return;
-
- if (!rtd->dai_link->dynamic)
- return;
-
- if (!rtd->card->debugfs_card_root)
- return;
-
- rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
- rtd->card->debugfs_card_root);
-
- debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
- rtd, &dpcm_state_fops);
-}
-#endif
projects / linux-2.6-microblaze.git / blobdiff