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Message-ID: <1448448376-12880-2-git-send-email-rf@opensource.wolfsonmicro.com>
Date: Wed, 25 Nov 2015 10:46:15 +0000
From: Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
To: <vinod.koul@...el.com>, <tiwai@...e.com>, <broonie@...nel.org>
CC: <perex@...ex.cz>, <lgirdwood@...il.com>,
<alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
<patches@...nsource.wolfsonmicro.com>
Subject: [PATCH v2 1/2] ALSA: compress: Add procfs info file for compressed nodes
This patch implements a procfs info file for compr nodes when
SND_VERBOSE_PROCFS is enabled. This is equivalent to what the PCM
core already does for pcm nodes.
Signed-off-by: Richard Fitzgerald <rf@...nsource.wolfsonmicro.com>
---
include/sound/compress_driver.h | 5 +++
sound/core/compress_offload.c | 75 ++++++++++++++++++++++++++++++++++++++++-
2 files changed, 79 insertions(+), 1 deletion(-)
diff --git a/include/sound/compress_driver.h b/include/sound/compress_driver.h
index fa1d055..85c4237 100644
--- a/include/sound/compress_driver.h
+++ b/include/sound/compress_driver.h
@@ -152,6 +152,11 @@ struct snd_compr {
unsigned int direction;
struct mutex lock;
int device;
+#ifdef CONFIG_SND_VERBOSE_PROCFS
+ char id[64];
+ struct snd_info_entry *proc_root;
+ struct snd_info_entry *proc_info_entry;
+#endif
};
/* compress device register APIs */
diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
index b123c42..282b69a 100644
--- a/sound/core/compress_offload.c
+++ b/sound/core/compress_offload.c
@@ -40,6 +40,7 @@
#include <linux/module.h>
#include <sound/core.h>
#include <sound/initval.h>
+#include <sound/info.h>
#include <sound/compress_params.h>
#include <sound/compress_offload.h>
#include <sound/compress_driver.h>
@@ -891,11 +892,78 @@ static int snd_compress_dev_disconnect(struct snd_device *device)
return 0;
}
+#ifdef CONFIG_SND_VERBOSE_PROCFS
+static void snd_compress_proc_info_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct snd_compr *compr = (struct snd_compr *)entry->private_data;
+
+ snd_iprintf(buffer, "card: %d\n", compr->card->number);
+ snd_iprintf(buffer, "device: %d\n", compr->device);
+ snd_iprintf(buffer, "stream: %s\n",
+ compr->direction == SND_COMPRESS_PLAYBACK
+ ? "PLAYBACK" : "CAPTURE");
+ snd_iprintf(buffer, "id: %s\n", compr->id);
+}
+
+static int snd_compress_proc_init(struct snd_compr *compr)
+{
+ struct snd_info_entry *entry;
+ char name[16];
+
+ sprintf(name, "compr%i", compr->device);
+ entry = snd_info_create_card_entry(compr->card, name,
+ compr->card->proc_root);
+ if (!entry)
+ return -ENOMEM;
+ entry->mode = S_IFDIR | S_IRUGO | S_IXUGO;
+ if (snd_info_register(entry) < 0) {
+ snd_info_free_entry(entry);
+ return -ENOMEM;
+ }
+ compr->proc_root = entry;
+
+ entry = snd_info_create_card_entry(compr->card, "info",
+ compr->proc_root);
+ if (entry) {
+ snd_info_set_text_ops(entry, compr,
+ snd_compress_proc_info_read);
+ if (snd_info_register(entry) < 0) {
+ snd_info_free_entry(entry);
+ entry = NULL;
+ }
+ }
+ compr->proc_info_entry = entry;
+
+ return 0;
+}
+
+static int snd_compress_proc_done(struct snd_compr *compr)
+{
+ snd_info_free_entry(compr->proc_info_entry);
+ compr->proc_info_entry = NULL;
+ snd_info_free_entry(compr->proc_root);
+ compr->proc_root = NULL;
+ return 0;
+}
+#else
+static int snd_compress_proc_init(struct snd_compr *compr)
+{
+ return 0;
+}
+
+static int snd_compress_proc_done(struct snd_compr *compr)
+{
+ return 0;
+}
+#endif
+
static int snd_compress_dev_free(struct snd_device *device)
{
struct snd_compr *compr;
compr = device->device_data;
+ snd_compress_proc_done(compr);
put_device(&compr->dev);
return 0;
}
@@ -915,6 +983,7 @@ int snd_compress_new(struct snd_card *card, int device,
.dev_register = snd_compress_dev_register,
.dev_disconnect = snd_compress_dev_disconnect,
};
+ int ret;
compr->card = card;
compr->device = device;
@@ -923,7 +992,11 @@ int snd_compress_new(struct snd_card *card, int device,
snd_device_initialize(&compr->dev, card);
dev_set_name(&compr->dev, "comprC%iD%i", card->number, device);
- return snd_device_new(card, SNDRV_DEV_COMPRESS, compr, &ops);
+ ret = snd_device_new(card, SNDRV_DEV_COMPRESS, compr, &ops);
+ if (ret == 0)
+ snd_compress_proc_init(compr);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(snd_compress_new);
--
1.9.1
--
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