[ALSA] intel8x0 - Add spdif_aclink option

Added spdif_aclink module option to specify whether the board
has SPDIF over AC-link or a direct connection from the controller
chip.
NForce and ICH4 (or newer) boards may be equipped with SPDIF
through AC97 codec.  In such a case, SPDIF should be handled
as if the old ICH style (the same slot for analog and digital).
A quirk list is added to detect this automatically for known
hardwares.
Corresponds to ALSA bug#2637.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 60 insertions, 26 deletions

diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index f8aef131be7a..a289abfc7172 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -71,6 +71,7 @@ static char *ac97_quirk;
 static int buggy_semaphore;
 static int buggy_irq = -1; /* auto-check */
 static int xbox;
+static int spdif_aclink = -1;
 
 module_param(index, int, 0444);
 MODULE_PARM_DESC(index, "Index value for Intel i8x0 soundcard.");
@@ -86,6 +87,8 @@ module_param(buggy_irq, bool, 0444);
 MODULE_PARM_DESC(buggy_irq, "Enable workaround for buggy interrupts on some motherboards.");
 module_param(xbox, bool, 0444);
 MODULE_PARM_DESC(xbox, "Set to 1 for Xbox, if you have problems with the AC'97 codec detection.");
+module_param(spdif_aclink, int, 0444);
+MODULE_PARM_DESC(spdif_aclink, "S/PDIF over AC-link.");
 
 /* just for backward compatibility */
 static int enable;
@@ -1578,10 +1581,14 @@ static int __devinit snd_intel8x0_pcm(struct intel8x0 *chip)
         case DEVICE_INTEL_ICH4:
                 tbl = intel_pcms;
                 tblsize = ARRAY_SIZE(intel_pcms);
+                if (spdif_aclink)
+                        tblsize--;
                 break;
         case DEVICE_NFORCE:
                 tbl = nforce_pcms;
                 tblsize = ARRAY_SIZE(nforce_pcms);
+                if (spdif_aclink)
+                        tblsize--;
                 break;
         case DEVICE_ALI:
                 tbl = ali_pcms;
@@ -2040,17 +2047,19 @@ static int __devinit snd_intel8x0_mixer(struct intel8x0 *chip, int ac97_clock,
         };
 
         chip->spdif_idx = -1; /* use PCMOUT (or disabled) */
-        switch (chip->device_type) {
-        case DEVICE_NFORCE:
-                chip->spdif_idx = NVD_SPBAR;
-                break;
-        case DEVICE_ALI:
-                chip->spdif_idx = ALID_AC97SPDIFOUT;
-                break;
-        case DEVICE_INTEL_ICH4:
-                chip->spdif_idx = ICHD_SPBAR;
-                break;
-        };
+        if (!spdif_aclink) {
+                switch (chip->device_type) {
+                case DEVICE_NFORCE:
+                        chip->spdif_idx = NVD_SPBAR;
+                        break;
+                case DEVICE_ALI:
+                        chip->spdif_idx = ALID_AC97SPDIFOUT;
+                        break;
+                case DEVICE_INTEL_ICH4:
+                        chip->spdif_idx = ICHD_SPBAR;
+                        break;
+                };
+        }
 
         chip->in_ac97_init = 1;
         
@@ -2173,11 +2182,11 @@ static int __devinit snd_intel8x0_mixer(struct intel8x0 *chip, int ac97_clock,
                 if ((igetdword(chip, ICHREG(GLOB_STA)) & ICH_SAMPLE_CAP) == ICH_SAMPLE_16_20)
                         chip->smp20bit = 1;
         }
-        if (chip->device_type == DEVICE_NFORCE) {
+        if (chip->device_type == DEVICE_NFORCE && !spdif_aclink) {
                 /* 48kHz only */
                 chip->ichd[chip->spdif_idx].pcm->rates = SNDRV_PCM_RATE_48000;
         }
-        if (chip->device_type == DEVICE_INTEL_ICH4) {
+        if (chip->device_type == DEVICE_INTEL_ICH4 && !spdif_aclink) {
                 /* use slot 10/11 for SPDIF */
                 u32 val;
                 val = igetdword(chip, ICHREG(GLOB_CNT)) & ~ICH_PCM_SPDIF_MASK;
@@ -2305,7 +2314,7 @@ static int snd_intel8x0_ich_chip_init(struct intel8x0 *chip, int probing)
                 /* unmute the output on SIS7012 */
                 iputword(chip, 0x4c, igetword(chip, 0x4c) | 1);
         }
-        if (chip->device_type == DEVICE_NFORCE) {
+        if (chip->device_type == DEVICE_NFORCE && !spdif_aclink) {
                 /* enable SPDIF interrupt */
                 unsigned int val;
                 pci_read_config_dword(chip->pci, 0x4c, &val);
@@ -2398,7 +2407,7 @@ static int snd_intel8x0_free(struct intel8x0 *chip)
         /* reset channels */
         for (i = 0; i < chip->bdbars_count; i++)
                 iputbyte(chip, ICH_REG_OFF_CR + chip->ichd[i].reg_offset, ICH_RESETREGS);
-        if (chip->device_type == DEVICE_NFORCE) {
+        if (chip->device_type == DEVICE_NFORCE && !spdif_aclink) {
                 /* stop the spdif interrupt */
                 unsigned int val;
                 pci_read_config_dword(chip->pci, 0x4c, &val);
@@ -2492,7 +2501,7 @@ static int intel8x0_resume(struct pci_dev *pci)
         snd_intel8x0_chip_init(chip, 0);
 
         /* re-initialize mixer stuff */
-        if (chip->device_type == DEVICE_INTEL_ICH4) {
+        if (chip->device_type == DEVICE_INTEL_ICH4 && !spdif_aclink) {
                 /* enable separate SDINs for ICH4 */
                 iputbyte(chip, ICHREG(SDM), chip->sdm_saved);
                 /* use slot 10/11 for SPDIF */
@@ -2928,6 +2937,29 @@ static struct shortname_table {
         { 0, NULL },
 };
 
+static struct snd_pci_quirk spdif_aclink_defaults[] __devinitdata = {
+        SND_PCI_QUIRK(0x147b, 0x1c1a, "ASUS KN8", 1),
+        { } /* end */
+};
+
+/* look up white/black list for SPDIF over ac-link */
+static int __devinit check_default_spdif_aclink(struct pci_dev *pci)
+{
+        const struct snd_pci_quirk *w;
+
+        w = snd_pci_quirk_lookup(pci, spdif_aclink_defaults);
+        if (w) {
+                if (w->value)
+                        snd_printdd(KERN_INFO "intel8x0: Using SPDIF over "
+                                    "AC-Link for %s\n", w->name);
+                else
+                        snd_printdd(KERN_INFO "intel8x0: Using integrated "
+                                    "SPDIF DMA for %s\n", w->name);
+                return w->value;
+        }
+        return 0;
+}
+
 static int __devinit snd_intel8x0_probe(struct pci_dev *pci,
                                         const struct pci_device_id *pci_id)
 {
@@ -2940,16 +2972,18 @@ static int __devinit snd_intel8x0_probe(struct pci_dev *pci,
         if (card == NULL)
                 return -ENOMEM;
 
-        switch (pci_id->driver_data) {
-        case DEVICE_NFORCE:
-                strcpy(card->driver, "NFORCE");
-                break;
-        case DEVICE_INTEL_ICH4:
-                strcpy(card->driver, "ICH4");
-                break;
-        default:
-                strcpy(card->driver, "ICH");
-                break;
+        if (spdif_aclink < 0)
+                spdif_aclink = check_default_spdif_aclink(pci);
+
+        strcpy(card->driver, "ICH");
+        if (!spdif_aclink) {
+                switch (pci_id->driver_data) {
+                case DEVICE_NFORCE:
+                        strcpy(card->driver, "NFORCE");
+                        break;
+                case DEVICE_INTEL_ICH4:
+                        strcpy(card->driver, "ICH4");
+                }
         }
 
         strcpy(card->shortname, "Intel ICH");