ALSA: hda - Add infrastructure for dynamic stream allocation
Added the infrastructure for dynamic stream allocation on HD-audio.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 6447754..19b4530 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -2262,6 +2262,28 @@
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 @@
*/
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 @@
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;
- err = set_pcm_default_values(codec, info);
- if (err < 0)
- return err;
+ }
+ 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 = snd_hda_attach_pcm(codec, cpcm);
+ if (err < 0)
+ return err;
}
}
return 0;