diff options
Diffstat (limited to 'sound/soc/soc-dapm.c')
| -rw-r--r-- | sound/soc/soc-dapm.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 5cfc90941e4..2f5295dbd15 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -1081,6 +1081,92 @@ static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action) } #endif +#ifdef CONFIG_DEBUG_FS +static int dapm_widget_power_open_file(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +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; + 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; + + in = is_connected_input_ep(w); + dapm_clear_walk(w->codec); + out = is_connected_output_ep(w); + dapm_clear_walk(w->codec); + + ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d\n", + w->name, w->power ? "On" : "Off", in, out); + + if (w->active && w->sname) + ret += snprintf(buf, PAGE_SIZE - ret, " stream %s active\n", + w->sname); + + list_for_each_entry(p, &w->sources, list_sink) { + if (p->connect) + ret += snprintf(buf + ret, PAGE_SIZE - ret, + " in %s %s\n", + p->name ? p->name : "static", + p->source->name); + } + list_for_each_entry(p, &w->sinks, list_source) { + if (p->connect) + ret += snprintf(buf + ret, PAGE_SIZE - ret, + " out %s %s\n", + p->name ? p->name : "static", + p->sink->name); + } + + 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 = dapm_widget_power_open_file, + .read = dapm_widget_power_read_file, +}; + +void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec) +{ + struct snd_soc_dapm_widget *w; + struct dentry *d; + + if (!codec->debugfs_dapm) + return; + + list_for_each_entry(w, &codec->dapm_widgets, list) { + if (!w->name) + continue; + + d = debugfs_create_file(w->name, 0444, + codec->debugfs_dapm, w, + &dapm_widget_power_fops); + if (!d) + printk(KERN_WARNING + "ASoC: Failed to create %s debugfs file\n", + w->name); + } +} +#else +void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec) +{ +} +#endif + /* test and update the power status of a mux widget */ static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget, struct snd_kcontrol *kcontrol, int mask, |