This is also in the old sysfs diagnostics but it's nice to have everything in one place.

Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/soc-dapm.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 48 insertions(+), 0 deletions(-)

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index c9196d6..b193a95 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -1204,6 +1204,47 @@ static const struct file_operations dapm_widget_power_fops = { .llseek = default_llseek, };

+static int dapm_bias_open_file(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +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: + BUG(); + 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 = dapm_bias_open_file, + .read = dapm_bias_read_file, + .llseek = default_llseek, +}; + void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm) { struct snd_soc_dapm_widget *w; @@ -1212,6 +1253,13 @@ void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm) if (!dapm->debugfs_dapm) 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"); + list_for_each_entry(w, &dapm->card->widgets, list) { if (!w->name || w->dapm != dapm) continue;