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ALSA: pcm: Embed struct device 

Like previous patches, at this time we embed the struct device into
PCM object.  However, this needs a bit more caution: struct snd_pcm
doesn't own one device but two, for both playback and capture!  Thus
not struct snd_pcm but struct snd_pcm_str object contains the device.

Along with this change, pcm->dev field is dropped for avoiding
confusion.  It was meant to point to a non-standard parent.  But,
since now we can touch each struct device directly, we can manipulate
the parent field easily there, too.

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2015-01-29 17:32:26 +01:00
parent 7b46160000
commit ef46c7af93
5 changed files with 22 additions and 27 deletions
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2
include/sound/pcm.h
View File

@ -449,6 +449,7 @@ struct snd_pcm_str {
#endif
#endif
struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */
struct device dev;
};
struct snd_pcm {
@ -465,7 +466,6 @@ struct snd_pcm {
wait_queue_head_t open_wait;
void *private_data;
void (*private_free) (struct snd_pcm *pcm);
struct device *dev; /* actual hw device this belongs to */
bool internal; /* pcm is for internal use only */
bool nonatomic; /* whole PCM operations are in non-atomic context */
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)

5
sound/aoa/soundbus/i2sbus/pcm.c
View File

@ -968,7 +968,6 @@ i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
printk(KERN_DEBUG "i2sbus: failed to create pcm\n");
goto out_put_ci_module;
}
dev->pcm->dev = &dev->ofdev.dev;
}
/* ALSA yet again sucks.
@ -988,6 +987,8 @@ i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
goto out_put_ci_module;
snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
&i2sbus_playback_ops);
dev->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].dev.parent =
&dev->ofdev.dev;
i2sdev->out.created = 1;
}
@ -1003,6 +1004,8 @@ i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
goto out_put_ci_module;
snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
&i2sbus_record_ops);
dev->pcm->streams[SNDRV_PCM_STREAM_CAPTURE].dev.parent =
&dev->ofdev.dev;
i2sdev->in.created = 1;
}

38
sound/core/pcm.c
View File

@ -673,6 +673,8 @@ static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substrea
static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; }
#endif /* CONFIG_SND_VERBOSE_PROCFS */
static const struct attribute_group *pcm_dev_attr_groups[];
/**
* snd_pcm_new_stream - create a new PCM stream
* @pcm: the pcm instance
@ -698,7 +700,15 @@ int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
pstr->stream = stream;
pstr->pcm = pcm;
pstr->substream_count = substream_count;
if (substream_count > 0 && !pcm->internal) {
if (!substream_count)
return 0;
snd_device_initialize(&pstr->dev, pcm->card);
pstr->dev.groups = pcm_dev_attr_groups;
dev_set_name(&pstr->dev, "pcmC%iD%i%c", pcm->card->number, pcm->device,
stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c');
if (!pcm->internal) {
err = snd_pcm_stream_proc_init(pstr);
if (err < 0) {
pcm_err(pcm, "Error in snd_pcm_stream_proc_init\n");
@ -868,6 +878,8 @@ static void snd_pcm_free_stream(struct snd_pcm_str * pstr)
kfree(setup);
}
#endif
if (pstr->substream_count)
put_device(&pstr->dev);
}
static int snd_pcm_free(struct snd_pcm *pcm)
@ -1069,9 +1081,7 @@ static int snd_pcm_dev_register(struct snd_device *device)
int cidx, err;
struct snd_pcm_substream *substream;
struct snd_pcm_notify *notify;
char str[16];
struct snd_pcm *pcm;
struct device *dev;
if (snd_BUG_ON(!device || !device->device_data))
return -ENXIO;
@ -1088,42 +1098,24 @@ static int snd_pcm_dev_register(struct snd_device *device)
continue;
switch (cidx) {
case SNDRV_PCM_STREAM_PLAYBACK:
sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device);
devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK;
break;
case SNDRV_PCM_STREAM_CAPTURE:
sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device);
devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE;
break;
}
/* device pointer to use, pcm->dev takes precedence if
* it is assigned, otherwise fall back to card's device
* if possible */
dev = pcm->dev;
if (!dev)
dev = snd_card_get_device_link(pcm->card);
/* register pcm */
err = snd_register_device_for_dev(devtype, pcm->card,
pcm->device,
&snd_pcm_f_ops[cidx],
pcm, NULL, dev, str);
pcm, &pcm->streams[cidx].dev,
NULL, NULL);
if (err < 0) {
list_del(&pcm->list);
mutex_unlock(&register_mutex);
return err;
}
dev = snd_get_device(devtype, pcm->card, pcm->device);
if (dev) {
err = sysfs_create_groups(&dev->kobj,
pcm_dev_attr_groups);
if (err < 0)
dev_warn(dev,
"pcm %d:%d: cannot create sysfs groups\n",
pcm->card->number, pcm->device);
put_device(dev);
}
for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
snd_pcm_timer_init(substream);
}

3
sound/pci/hda/hda_controller.c
View File

@ -939,7 +939,8 @@ static int azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec,
chip->card->dev,
size, MAX_PREALLOC_SIZE);
/* link to codec */
pcm->dev = &codec->dev;
for (s = 0; s < 2; s++)
pcm->streams[s].dev.parent = &codec->dev;
return 0;
}

1
sound/soc/intel/sst-mfld-platform-pcm.c
View File

@ -645,7 +645,6 @@ static struct snd_pcm_ops sst_platform_ops = {
static void sst_pcm_free(struct snd_pcm *pcm)
{
dev_dbg(pcm->dev, "sst_pcm_free called\n");
snd_pcm_lib_preallocate_free_for_all(pcm);
}