[ALSA] hda-intel - Fix PCM device number assignment

In the current scheme, PCM device numbers are assigned incrementally
in the order of codecs.  This causes problems when the codec number
is irregular, e.g. codec #0 for HDMI and codec #1 for analog.  Then
the HDMI becomes the first PCM, which is picked up as the default
output device.  Unfortuantely this doesn't work well with normal
setups.

This patch introduced the fixed device numbers for the PCM types,
namely, analog, SPDIF, HDMI and modem.  The PCM devices are assigned
according to the corresponding PCM type.  After this patch, HDMI will
be always assigned to PCM #3, SPDIF to PCM #1, and the first analog
to PCM #0, etc.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 47 insertions, 42 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 4be36c84b36c..18475de074b2 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -211,9 +211,7 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
 /* max buffer size - no h/w limit, you can increase as you like */
 #define AZX_MAX_BUF_SIZE        (1024*1024*1024)
 /* max number of PCM devics per card */
-#define AZX_MAX_AUDIO_PCMS      6
-#define AZX_MAX_MODEM_PCMS      2
-#define AZX_MAX_PCMS            (AZX_MAX_AUDIO_PCMS + AZX_MAX_MODEM_PCMS)
+#define AZX_MAX_PCMS            8
 
 /* RIRB int mask: overrun[2], response[0] */
 #define RIRB_INT_RESPONSE       0x01
@@ -350,7 +348,6 @@ struct azx {
         struct azx_dev *azx_dev;
 
         /* PCM */
-        unsigned int pcm_devs;
         struct snd_pcm *pcm[AZX_MAX_PCMS];
 
         /* HD codec */
@@ -1386,7 +1383,7 @@ static void azx_pcm_free(struct snd_pcm *pcm)
 }
 
 static int __devinit create_codec_pcm(struct azx *chip, struct hda_codec *codec,
-                                      struct hda_pcm *cpcm, int pcm_dev)
+                                      struct hda_pcm *cpcm)
 {
         int err;
         struct snd_pcm *pcm;
@@ -1400,7 +1397,7 @@ static int __devinit create_codec_pcm(struct azx *chip, struct hda_codec *codec,
 
         snd_assert(cpcm->name, return -EINVAL);
 
-        err = snd_pcm_new(chip->card, cpcm->name, pcm_dev,
+        err = snd_pcm_new(chip->card, cpcm->name, cpcm->device,
                           cpcm->stream[0].substreams,
                           cpcm->stream[1].substreams,
                           &pcm);
@@ -1423,59 +1420,67 @@ static int __devinit create_codec_pcm(struct azx *chip, struct hda_codec *codec,
         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
                                               snd_dma_pci_data(chip->pci),
                                               1024 * 64, 1024 * 1024);
-        chip->pcm[pcm_dev] = pcm;
-        if (chip->pcm_devs < pcm_dev + 1)
-                chip->pcm_devs = pcm_dev + 1;
-
+        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 pcm_dev;
+        int num_devs[HDA_PCM_NTYPES];
 
         err = snd_hda_build_pcms(chip->bus);
         if (err < 0)
                 return err;
 
         /* create audio PCMs */
-        pcm_dev = 0;
-        list_for_each_entry(codec, &chip->bus->codec_list, list) {
-                for (c = 0; c < codec->num_pcms; c++) {
-                        if (codec->pcm_info[c].is_modem)
-                                continue; /* create later */
-                        if (pcm_dev >= AZX_MAX_AUDIO_PCMS) {
-                                snd_printk(KERN_ERR SFX
-                                           "Too many audio PCMs\n");
-                                return -EINVAL;
-                        }
-                        err = create_codec_pcm(chip, codec,
-                                               &codec->pcm_info[c], pcm_dev);
-                        if (err < 0)
-                                return err;
-                        pcm_dev++;
-                }
-        }
-
-        /* create modem PCMs */
-        pcm_dev = AZX_MAX_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++) {
-                        if (!codec->pcm_info[c].is_modem)
-                                continue; /* already created */
-                        if (pcm_dev >= AZX_MAX_PCMS) {
-                                snd_printk(KERN_ERR SFX
-                                           "Too many modem PCMs\n");
-                                return -EINVAL;
+                        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;
                         }
-                        err = create_codec_pcm(chip, codec,
-                                               &codec->pcm_info[c], pcm_dev);
+                        num_devs[type]++;
+                        err = create_codec_pcm(chip, codec, cpcm);
                         if (err < 0)
                                 return err;
-                        chip->pcm[pcm_dev]->dev_class = SNDRV_PCM_CLASS_MODEM;
-                        pcm_dev++;
                 }
         }
         return 0;
@@ -1587,7 +1592,7 @@ static int azx_suspend(struct pci_dev *pci, pm_message_t state)
         int i;
 
         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
-        for (i = 0; i < chip->pcm_devs; i++)
+        for (i = 0; i < AZX_MAX_PCMS; i++)
                 snd_pcm_suspend_all(chip->pcm[i]);
         if (chip->initialized)
                 snd_hda_suspend(chip->bus, state);