From b97c5070679f498bc3c96d07173de6a012acc165 Mon Sep 17 00:00:00 2001 From: Misael Lopez Cruz Date: Mon, 5 Sep 2011 02:16:14 -0500 Subject: ASoC: DSP: Add state and hw_params info to debugfs Add information about state and hw_params for FE and its BE clients. Change-Id: Ia0e88a3318ee176fcb89e36e5183e3938d0b5019 Signed-off-by: Liam Girdwood Signed-off-by: Misael Lopez Cruz --- sound/soc/soc-dsp.c | 123 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) (limited to 'sound/soc') diff --git a/sound/soc/soc-dsp.c b/sound/soc/soc-dsp.c index 2692255..ebb3dd7 100644 --- a/sound/soc/soc-dsp.c +++ b/sound/soc/soc-dsp.c @@ -1538,6 +1538,125 @@ int soc_dsp_fe_dai_close(struct snd_pcm_substream *fe_substream) } #ifdef CONFIG_DEBUG_FS +static char *dsp_state_string(enum snd_soc_dsp_state state) +{ + switch (state) { + case SND_SOC_DSP_STATE_NEW: + return "new"; + case SND_SOC_DSP_STATE_OPEN: + return "open"; + case SND_SOC_DSP_STATE_HW_PARAMS: + return "hw_params"; + case SND_SOC_DSP_STATE_PREPARE: + return "prepare"; + case SND_SOC_DSP_STATE_START: + return "start"; + case SND_SOC_DSP_STATE_STOP: + return "stop"; + case SND_SOC_DSP_STATE_HW_FREE: + return "hw_free"; + case SND_SOC_DSP_STATE_CLOSE: + return "close"; + } + + return "unknown"; +} + +static int soc_dsp_state_open_file(struct inode *inode, struct file *file) +{ + file->private_data = inode->i_private; + return 0; +} + +static ssize_t soc_dsp_show_state(struct snd_soc_pcm_runtime *fe, + int stream, char *buf, size_t size) +{ + struct snd_pcm_hw_params *params = &fe->dsp[stream].hw_params; + struct snd_soc_dsp_params *dsp_params; + ssize_t offset = 0; + + /* 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", + dsp_state_string(fe->dsp[stream].state)); + + if ((fe->dsp[stream].state >= SND_SOC_DSP_STATE_HW_PARAMS) && + (fe->dsp[stream].state <= SND_SOC_DSP_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->dsp[stream].be_clients)) { + offset += snprintf(buf + offset, size - offset, + " No active DSP links\n"); + goto out; + } + + list_for_each_entry(dsp_params, &fe->dsp[stream].be_clients, list_be) { + struct snd_soc_pcm_runtime *be = dsp_params->be; + + offset += snprintf(buf + offset, size - offset, + "- %s\n", be->dai_link->name); + + offset += snprintf(buf + offset, size - offset, + " State: %s\n", + dsp_state_string(fe->dsp[stream].state)); + + if ((be->dsp[stream].state >= SND_SOC_DSP_STATE_HW_PARAMS) && + (be->dsp[stream].state <= SND_SOC_DSP_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)); + } + +out: + return offset; +} + +static ssize_t soc_dsp_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 (fe->cpu_dai->driver->playback.channels_min) + offset += soc_dsp_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, + buf + offset, out_count - offset); + + if (fe->cpu_dai->driver->capture.channels_min) + offset += soc_dsp_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 soc_dsp_state_fops = { + .open = soc_dsp_state_open_file, + .read = soc_dsp_state_read_file, + .llseek = default_llseek, +}; + int soc_dsp_debugfs_add(struct snd_soc_pcm_runtime *rtd) { rtd->debugfs_dsp_root = debugfs_create_dir(rtd->dai_link->name, @@ -1549,6 +1668,10 @@ int soc_dsp_debugfs_add(struct snd_soc_pcm_runtime *rtd) return -EINVAL; } + rtd->debugfs_dsp_state = debugfs_create_file("state", 0644, + rtd->debugfs_dsp_root, + rtd, &soc_dsp_state_fops); + return 0; } #endif -- cgit v1.1