diff options
author | Takashi Iwai <tiwai@suse.de> | 2011-11-24 13:31:46 (GMT) |
---|---|---|
committer | Takashi Iwai <tiwai@suse.de> | 2011-11-26 09:19:44 (GMT) |
commit | 01b65bfb4f8cd45b0d44547c961ef59a0bcf74be (patch) | |
tree | b297e5611802e0734a263718f59434d3e436e6c9 /sound/pci/hda/hda_intel.c | |
parent | b37c0096b448d099d304bb47c4eada9117dba4cf (diff) | |
download | linux-fsl-qoriq-01b65bfb4f8cd45b0d44547c961ef59a0bcf74be.tar.xz |
ALSA: hda - Supports more audio streams
So far, the driver supports up to 10 streams. This is a restriction in
hda_intel.c and hda_codec.c: in the former, the fixed array size limits
the amount, and in the latter, the fixed device-number assignment table
(in get_empty_pcm_device()) limits the possibility.
This patch reduces the restriction by
- using linked list for managing PCM instances in hda_intel.c, and
- assigning non-fixed device numbers for the extra devices
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_intel.c')
-rw-r--r-- | sound/pci/hda/hda_intel.c | 48 |
1 files changed, 24 insertions, 24 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 096507d..ddd7f3b 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -407,6 +407,14 @@ struct azx_rb { u32 res[AZX_MAX_CODECS]; /* last read value */ }; +struct azx_pcm { + struct azx *chip; + struct snd_pcm *pcm; + struct hda_codec *codec; + struct hda_pcm_stream *hinfo[2]; + struct list_head list; +}; + struct azx { struct snd_card *card; struct pci_dev *pci; @@ -434,7 +442,7 @@ struct azx { struct azx_dev *azx_dev; /* PCM */ - struct snd_pcm *pcm[HDA_MAX_PCMS]; + struct list_head pcm_list; /* azx_pcm list */ /* HD codec */ unsigned short codec_mask; @@ -1486,10 +1494,9 @@ static void azx_bus_reset(struct hda_bus *bus) azx_init_chip(chip, 1); #ifdef CONFIG_PM if (chip->initialized) { - int i; - - for (i = 0; i < HDA_MAX_PCMS; i++) - snd_pcm_suspend_all(chip->pcm[i]); + struct azx_pcm *p; + list_for_each_entry(p, &chip->pcm_list, list) + snd_pcm_suspend_all(p->pcm); snd_hda_suspend(chip->bus); snd_hda_resume(chip->bus); } @@ -1667,12 +1674,6 @@ static struct snd_pcm_hardware azx_pcm_hw = { .fifo_size = 0, }; -struct azx_pcm { - struct azx *chip; - struct hda_codec *codec; - struct hda_pcm_stream *hinfo[2]; -}; - static int azx_pcm_open(struct snd_pcm_substream *substream) { struct azx_pcm *apcm = snd_pcm_substream_chip(substream); @@ -2197,7 +2198,7 @@ static void azx_pcm_free(struct snd_pcm *pcm) { struct azx_pcm *apcm = pcm->private_data; if (apcm) { - apcm->chip->pcm[pcm->device] = NULL; + list_del(&apcm->list); kfree(apcm); } } @@ -2215,14 +2216,11 @@ azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec, unsigned int size; int s, err; - if (pcm_dev >= HDA_MAX_PCMS) { - snd_printk(KERN_ERR SFX "Invalid PCM device number %d\n", - pcm_dev); - return -EINVAL; - } - if (chip->pcm[pcm_dev]) { - snd_printk(KERN_ERR SFX "PCM %d already exists\n", pcm_dev); - return -EBUSY; + list_for_each_entry(apcm, &chip->pcm_list, list) { + if (apcm->pcm->device == pcm_dev) { + snd_printk(KERN_ERR SFX "PCM %d already exists\n", pcm_dev); + return -EBUSY; + } } err = snd_pcm_new(chip->card, cpcm->name, pcm_dev, cpcm->stream[SNDRV_PCM_STREAM_PLAYBACK].substreams, @@ -2235,12 +2233,13 @@ azx_attach_pcm_stream(struct hda_bus *bus, struct hda_codec *codec, if (apcm == NULL) return -ENOMEM; apcm->chip = chip; + apcm->pcm = pcm; apcm->codec = codec; pcm->private_data = apcm; pcm->private_free = azx_pcm_free; if (cpcm->pcm_type == HDA_PCM_TYPE_MODEM) pcm->dev_class = SNDRV_PCM_CLASS_MODEM; - chip->pcm[pcm_dev] = pcm; + list_add_tail(&apcm->list, &chip->pcm_list); cpcm->pcm = pcm; for (s = 0; s < 2; s++) { apcm->hinfo[s] = &cpcm->stream[s]; @@ -2370,12 +2369,12 @@ static int azx_suspend(struct pci_dev *pci, pm_message_t state) { struct snd_card *card = pci_get_drvdata(pci); struct azx *chip = card->private_data; - int i; + struct azx_pcm *p; snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); azx_clear_irq_pending(chip); - for (i = 0; i < HDA_MAX_PCMS; i++) - snd_pcm_suspend_all(chip->pcm[i]); + list_for_each_entry(p, &chip->pcm_list, list) + snd_pcm_suspend_all(p->pcm); if (chip->initialized) snd_hda_suspend(chip->bus); azx_stop_chip(chip); @@ -2672,6 +2671,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci, check_msi(chip); chip->dev_index = dev; INIT_WORK(&chip->irq_pending_work, azx_irq_pending_work); + INIT_LIST_HEAD(&chip->pcm_list); chip->position_fix[0] = chip->position_fix[1] = check_position_fix(chip, position_fix[dev]); |