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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@opensource.wolfsonmicro.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Richard Fitzgerald 2015-11-25 13:00:23 +00:00 committed by Takashi Iwai
parent 5df29bca12
commit 3174272474
2 changed files with 77 additions and 1 deletions
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5
include/sound/compress_driver.h
View File

@ -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 */

73
sound/core/compress_offload.c
View File

@ -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 +892,76 @@ 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 void 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;
}
#else
static inline int snd_compress_proc_init(struct snd_compr *compr)
{
return 0;
}
static inline void snd_compress_proc_done(struct snd_compr *compr)
{
}
#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 +981,7 @@ 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 +990,11 @@ 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);