[alsa-devel] [PATCH 2/5] ASoC: dpcm: Add debugFS support for DPCM
Liam Girdwood
lrg at ti.com
Wed Apr 25 13:12:50 CEST 2012
Add debugFS files for DPCM link management information.
Signed-off-by: Liam Girdwood <lrg at ti.com>
---
include/sound/soc-dpcm.h | 4 +
include/sound/soc.h | 4 +
sound/soc/soc-core.c | 11 +++
sound/soc/soc-pcm.c | 152 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 171 insertions(+), 0 deletions(-)
diff --git a/include/sound/soc-dpcm.h b/include/sound/soc-dpcm.h
index cd72c10..e307fa3 100644
--- a/include/sound/soc-dpcm.h
+++ b/include/sound/soc-dpcm.h
@@ -81,6 +81,9 @@ struct snd_soc_dpcm {
/* hw params for this link - may be different for each link */
struct snd_pcm_hw_params hw_params;
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *debugfs_state;
+#endif
};
/*
@@ -128,5 +131,6 @@ void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, int stream,
/* internal use only */
int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute);
+int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
#endif
diff --git a/include/sound/soc.h b/include/sound/soc.h
index c2eb563..c48d89d 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -935,6 +935,10 @@ struct snd_soc_pcm_runtime {
struct snd_soc_dai *cpu_dai;
struct delayed_work delayed_work;
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *debugfs_dpcm_root;
+ struct dentry *debugfs_dpcm_state;
+#endif
};
/* mixer control */
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 1a2626d..a25ba6f 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1187,6 +1187,17 @@ static int soc_post_component_init(struct snd_soc_card *card,
dev_err(codec->dev,
"asoc: failed to add codec sysfs files: %d\n", ret);
+#ifdef CONFIG_DEBUG_FS
+ /* add DPCM sysfs entries */
+ if (!dai_link->dynamic)
+ goto out;
+
+ ret = soc_dpcm_debugfs_add(rtd);
+ if (ret < 0)
+ dev_err(rtd->dev, "asoc: failed to add dpcm sysfs entries: %d\n", ret);
+
+out:
+#endif
return 0;
}
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 458f116..a1d4426 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -23,6 +23,7 @@
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/export.h>
+#include <linux/debugfs.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@@ -690,6 +691,10 @@ static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
stream ? "capture" : "playback", fe->dai_link->name,
stream ? "<-" : "->", be->dai_link->name);
+#ifdef CONFIG_DEBUG_FS
+ dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
+ fe->debugfs_dpcm_root, &dpcm->state);
+#endif
return 1;
}
@@ -741,6 +746,9 @@ static void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
/* BEs still alive need new FE */
dpcm_be_reparent(fe, dpcm->be, stream);
+#ifdef CONFIG_DEBUG_FS
+ debugfs_remove(dpcm->debugfs_state);
+#endif
list_del(&dpcm->list_be);
list_del(&dpcm->list_fe);
kfree(dpcm);
@@ -1890,3 +1898,147 @@ int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
return 1;
}
EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
+
+#ifdef CONFIG_DEBUG_FS
+static 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 int dpcm_state_open_file(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+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;
+
+ /* 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;
+ }
+
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+ 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));
+ }
+
+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 (fe->cpu_dai->driver->playback.channels_min)
+ offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK,
+ buf + offset, out_count - offset);
+
+ if (fe->cpu_dai->driver->capture.channels_min)
+ 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 = dpcm_state_open_file,
+ .read = dpcm_state_read_file,
+ .llseek = default_llseek,
+};
+
+int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
+{
+ rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name,
+ rtd->card->debugfs_card_root);
+ if (!rtd->debugfs_dpcm_root) {
+ dev_dbg(rtd->dev,
+ "ASoC: Failed to create dpcm debugfs directory %s\n",
+ rtd->dai_link->name);
+ return -EINVAL;
+ }
+
+ rtd->debugfs_dpcm_state = debugfs_create_file("state", 0644,
+ rtd->debugfs_dpcm_root,
+ rtd, &dpcm_state_fops);
+
+ return 0;
+}
+#endif
--
1.7.5.4
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