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[ALSA] hda-intel - Use position buffer as default 

Modules: HDA Intel driver

- Use the position buffer for obtaining the current DMA position
  as default.  This seems more stable than others.
- Add probe_mask module option (mainly for test boards with multiple
  codecs).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2005-11-24 16:03:40 +01:00 committed by Jaroslav Kysela
parent 5014f19316
commit 606ad75fb5
1 changed files with 8 additions and 29 deletions
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37
sound/pci/hda/hda_intel.c
View File

@ -52,6 +52,7 @@ static int index = SNDRV_DEFAULT_IDX1;
static char *id = SNDRV_DEFAULT_STR1;
static char *model;
static int position_fix;
static int probe_mask;
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for Intel HD audio interface.");
@ -61,6 +62,9 @@ module_param(model, charp, 0444);
MODULE_PARM_DESC(model, "Use the given board model.");
module_param(position_fix, int, 0444);
MODULE_PARM_DESC(position_fix, "Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size).");
module_param(probe_mask, int, 0444);
MODULE_PARM_DESC(probe_mask, "Bitmask to probe codecs (default = -1).");
/* just for backward compatibility */
static int enable;
@ -916,7 +920,7 @@ static int __devinit azx_codec_create(struct azx *chip, const char *model)
codecs = 0;
for (c = 0; c < AZX_MAX_CODECS; c++) {
if (chip->codec_mask & (1 << c)) {
if ((chip->codec_mask & (1 << c)) & probe_mask) {
err = snd_hda_codec_new(chip->bus, c, NULL);
if (err < 0)
continue;
@ -1150,31 +1154,6 @@ static snd_pcm_uframes_t azx_pcm_pointer(struct snd_pcm_substream *substream)
pos = azx_sd_readl(azx_dev, SD_LPIB);
if (chip->position_fix == POS_FIX_FIFO)
pos += azx_dev->fifo_size;
#if 0 /* disabled temprarily, auto-correction doesn't work well... */
else if (chip->position_fix == POS_FIX_AUTO && azx_dev->period_updating) {
/* check the validity of DMA position */
unsigned int diff = 0;
azx_dev->last_pos += azx_dev->fragsize;
if (azx_dev->last_pos > pos)
diff = azx_dev->last_pos - pos;
if (azx_dev->last_pos >= azx_dev->bufsize) {
if (pos < azx_dev->fragsize)
diff = 0;
azx_dev->last_pos = 0;
}
if (diff > 0 && diff <= azx_dev->fifo_size)
pos += azx_dev->fifo_size;
else {
snd_printdd(KERN_INFO "hda_intel: DMA position fix %d, switching to posbuf\n", diff);
chip->position_fix = POS_FIX_POSBUF;
pos = *azx_dev->posbuf;
}
azx_dev->period_updating = 0;
}
#else
else if (chip->position_fix == POS_FIX_AUTO)
pos += azx_dev->fifo_size;
#endif
}
if (pos >= azx_dev->bufsize)
pos = 0;
@ -1412,7 +1391,7 @@ static int azx_dev_free(struct snd_device *device)
* constructor
*/
static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
int posfix, int driver_type,
int driver_type,
struct azx **rchip)
{
struct azx *chip;
@ -1441,7 +1420,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
chip->irq = -1;
chip->driver_type = driver_type;
chip->position_fix = posfix;
chip->position_fix = position_fix ? position_fix : POS_FIX_POSBUF;
#if BITS_PER_LONG != 64
/* Fix up base address on ULI M5461 */
@ -1559,7 +1538,7 @@ static int __devinit azx_probe(struct pci_dev *pci, const struct pci_device_id *
return -ENOMEM;
}
if ((err = azx_create(card, pci, position_fix, pci_id->driver_data,
if ((err = azx_create(card, pci, pci_id->driver_data,
&chip)) < 0) {
snd_card_free(card);
return err;