From 176d5335fe66f379a339b0ab99cc7566e90ff1a9 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 30 Jul 2008 15:01:44 +0200 Subject: [PATCH] ALSA: hda - Add infrastructure for dynamic stream allocation Added the infrastructure for dynamic stream allocation on HD-audio. Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_codec.c | 74 ++++++++++++++++++++--- sound/pci/hda/hda_codec.h | 5 +- sound/pci/hda/hda_intel.c | 121 +++++++++++--------------------------- 3 files changed, 105 insertions(+), 95 deletions(-) diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 6447754ae56e..19b4530e3baf 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -2262,6 +2262,28 @@ static int __devinit set_pcm_default_values(struct hda_codec *codec, return 0; } +/* + * attach a new PCM stream + */ +static int __devinit +snd_hda_attach_pcm(struct hda_codec *codec, struct hda_pcm *pcm) +{ + struct hda_pcm_stream *info; + int stream, err; + + if (!pcm->name) + return -EINVAL; + for (stream = 0; stream < 2; stream++) { + info = &pcm->stream[stream]; + if (info->substreams) { + err = set_pcm_default_values(codec, info); + if (err < 0) + return err; + } + } + return codec->bus->ops.attach_pcm(codec, pcm); +} + /** * snd_hda_build_pcms - build PCM information * @bus: the BUS @@ -2290,10 +2312,24 @@ static int __devinit set_pcm_default_values(struct hda_codec *codec, */ int __devinit snd_hda_build_pcms(struct hda_bus *bus) { + static const char *dev_name[HDA_PCM_NTYPES] = { + "Audio", "SPDIF", "HDMI", "Modem" + }; + /* starting device index for each PCM type */ + static int dev_idx[HDA_PCM_NTYPES] = { + [HDA_PCM_TYPE_AUDIO] = 0, + [HDA_PCM_TYPE_SPDIF] = 1, + [HDA_PCM_TYPE_HDMI] = 3, + [HDA_PCM_TYPE_MODEM] = 6 + }; + /* normal audio device indices; not linear to keep compatibility */ + static int audio_idx[4] = { 0, 2, 4, 5 }; struct hda_codec *codec; + int num_devs[HDA_PCM_NTYPES]; + memset(num_devs, 0, sizeof(num_devs)); list_for_each_entry(codec, &bus->codec_list, list) { - unsigned int pcm, s; + unsigned int pcm; int err; if (!codec->patch_ops.build_pcms) continue; @@ -2301,15 +2337,37 @@ int __devinit snd_hda_build_pcms(struct hda_bus *bus) if (err < 0) return err; for (pcm = 0; pcm < codec->num_pcms; pcm++) { - for (s = 0; s < 2; s++) { - struct hda_pcm_stream *info; - info = &codec->pcm_info[pcm].stream[s]; - if (!info->substreams) + struct hda_pcm *cpcm = &codec->pcm_info[pcm]; + int type = cpcm->pcm_type; + switch (type) { + case HDA_PCM_TYPE_AUDIO: + if (num_devs[type] >= ARRAY_SIZE(audio_idx)) { + snd_printk(KERN_WARNING + "Too many audio devices\n"); + continue; + } + cpcm->device = audio_idx[num_devs[type]]; + break; + case HDA_PCM_TYPE_SPDIF: + case HDA_PCM_TYPE_HDMI: + case HDA_PCM_TYPE_MODEM: + if (num_devs[type]) { + snd_printk(KERN_WARNING + "%s already defined\n", + dev_name[type]); continue; - err = set_pcm_default_values(codec, info); - if (err < 0) - return err; + } + cpcm->device = dev_idx[type]; + break; + default: + snd_printk(KERN_WARNING + "Invalid PCM type %d\n", type); + continue; } + num_devs[type]++; + err = snd_hda_attach_pcm(codec, cpcm); + if (err < 0) + return err; } } return 0; diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h index 60468f562400..70e8fa09273d 100644 --- a/sound/pci/hda/hda_codec.h +++ b/sound/pci/hda/hda_codec.h @@ -542,6 +542,8 @@ struct hda_bus_ops { unsigned int (*get_response)(struct hda_codec *codec); /* free the private data */ void (*private_free)(struct hda_bus *); + /* attach a PCM stream */ + int (*attach_pcm)(struct hda_codec *codec, struct hda_pcm *pcm); #ifdef CONFIG_SND_HDA_POWER_SAVE /* notify power-up/down from codec to controller */ void (*pm_notify)(struct hda_codec *codec); @@ -680,7 +682,8 @@ struct hda_pcm { char *name; struct hda_pcm_stream stream[2]; unsigned int pcm_type; /* HDA_PCM_TYPE_XXX */ - int device; /* assigned device number */ + int device; /* device number to assign */ + struct snd_pcm *pcm; /* assigned PCM instance */ }; /* codec information */ diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 9f316c1b2790..7b0abf08a583 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1180,6 +1180,7 @@ static int azx_setup_controller(struct azx *chip, struct azx_dev *azx_dev) return 0; } +static int azx_attach_pcm_stream(struct hda_codec *codec, struct hda_pcm *cpcm); /* * Codec initialization @@ -1212,6 +1213,7 @@ static int __devinit azx_codec_create(struct azx *chip, const char *model, bus_temp.pci = chip->pci; bus_temp.ops.command = azx_send_cmd; bus_temp.ops.get_response = azx_get_response; + bus_temp.ops.attach_pcm = azx_attach_pcm_stream; #ifdef CONFIG_SND_HDA_POWER_SAVE bus_temp.ops.pm_notify = azx_power_notify; #endif @@ -1718,111 +1720,58 @@ static struct snd_pcm_ops azx_pcm_ops = { static void azx_pcm_free(struct snd_pcm *pcm) { - kfree(pcm->private_data); + struct azx_pcm *apcm = pcm->private_data; + if (apcm) { + apcm->chip->pcm[pcm->device] = NULL; + kfree(apcm); + } } -static int __devinit create_codec_pcm(struct azx *chip, struct hda_codec *codec, - struct hda_pcm *cpcm) +static int +azx_attach_pcm_stream(struct hda_codec *codec, struct hda_pcm *cpcm) { - int err; + struct azx *chip = codec->bus->private_data; struct snd_pcm *pcm; struct azx_pcm *apcm; + int pcm_dev = cpcm->device; + int s, err; - /* if no substreams are defined for both playback and capture, - * it's just a placeholder. ignore it. - */ - if (!cpcm->stream[0].substreams && !cpcm->stream[1].substreams) - return 0; - - if (snd_BUG_ON(!cpcm->name)) + if (pcm_dev >= AZX_MAX_PCMS) { + snd_printk(KERN_ERR SFX "Invalid PCM device number %d\n", + pcm_dev); return -EINVAL; - - err = snd_pcm_new(chip->card, cpcm->name, cpcm->device, - cpcm->stream[0].substreams, - cpcm->stream[1].substreams, + } + if (chip->pcm[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, + cpcm->stream[SNDRV_PCM_STREAM_CAPTURE].substreams, &pcm); if (err < 0) return err; strcpy(pcm->name, cpcm->name); - apcm = kmalloc(sizeof(*apcm), GFP_KERNEL); + apcm = kzalloc(sizeof(*apcm), GFP_KERNEL); if (apcm == NULL) return -ENOMEM; apcm->chip = chip; apcm->codec = codec; - apcm->hinfo[0] = &cpcm->stream[0]; - apcm->hinfo[1] = &cpcm->stream[1]; pcm->private_data = apcm; pcm->private_free = azx_pcm_free; - if (cpcm->stream[0].substreams) - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &azx_pcm_ops); - if (cpcm->stream[1].substreams) - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &azx_pcm_ops); + if (cpcm->pcm_type == HDA_PCM_TYPE_MODEM) + pcm->dev_class = SNDRV_PCM_CLASS_MODEM; + chip->pcm[pcm_dev] = pcm; + cpcm->pcm = pcm; + for (s = 0; s < 2; s++) { + apcm->hinfo[s] = &cpcm->stream[s]; + if (cpcm->stream[s].substreams) + snd_pcm_set_ops(pcm, s, &azx_pcm_ops); + } + /* buffer pre-allocation */ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG, snd_dma_pci_data(chip->pci), 1024 * 64, 32 * 1024 * 1024); - chip->pcm[cpcm->device] = pcm; - return 0; -} - -static int __devinit azx_pcm_create(struct azx *chip) -{ - static const char *dev_name[HDA_PCM_NTYPES] = { - "Audio", "SPDIF", "HDMI", "Modem" - }; - /* starting device index for each PCM type */ - static int dev_idx[HDA_PCM_NTYPES] = { - [HDA_PCM_TYPE_AUDIO] = 0, - [HDA_PCM_TYPE_SPDIF] = 1, - [HDA_PCM_TYPE_HDMI] = 3, - [HDA_PCM_TYPE_MODEM] = 6 - }; - /* normal audio device indices; not linear to keep compatibility */ - static int audio_idx[4] = { 0, 2, 4, 5 }; - struct hda_codec *codec; - int c, err; - int num_devs[HDA_PCM_NTYPES]; - - err = snd_hda_build_pcms(chip->bus); - if (err < 0) - return err; - - /* create audio PCMs */ - memset(num_devs, 0, sizeof(num_devs)); - list_for_each_entry(codec, &chip->bus->codec_list, list) { - for (c = 0; c < codec->num_pcms; c++) { - struct hda_pcm *cpcm = &codec->pcm_info[c]; - int type = cpcm->pcm_type; - switch (type) { - case HDA_PCM_TYPE_AUDIO: - if (num_devs[type] >= ARRAY_SIZE(audio_idx)) { - snd_printk(KERN_WARNING - "Too many audio devices\n"); - continue; - } - cpcm->device = audio_idx[num_devs[type]]; - break; - case HDA_PCM_TYPE_SPDIF: - case HDA_PCM_TYPE_HDMI: - case HDA_PCM_TYPE_MODEM: - if (num_devs[type]) { - snd_printk(KERN_WARNING - "%s already defined\n", - dev_name[type]); - continue; - } - cpcm->device = dev_idx[type]; - break; - default: - snd_printk(KERN_WARNING - "Invalid PCM type %d\n", type); - continue; - } - num_devs[type]++; - err = create_codec_pcm(chip, codec, cpcm); - if (err < 0) - return err; - } - } return 0; } @@ -2324,7 +2273,7 @@ static int __devinit azx_probe(struct pci_dev *pci, } /* create PCM streams */ - err = azx_pcm_create(chip); + err = snd_hda_build_pcms(chip->bus); if (err < 0) { snd_card_free(card); return err; -- 2.20.1