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authorTakashi Iwai <tiwai@suse.de>2007-02-01 09:46:50 -0500
committerJaroslav Kysela <perex@suse.cz>2007-02-09 03:03:32 -0500
commit3372a153c230bd0b28d470118d5a4c5840f8f966 (patch)
treef705d4b3bfd3527876d8895877d84e1ddb37b6fb /sound/pci/hda/hda_intel.c
parent0981a260a1fe4a3f22cc70ef01ce38a73f548745 (diff)
[ALSA] hda-intel - Add black/whitelist for position_fix option
Some devices are known to require position_fix=1 or 2 to make the driver working correctly. Otherwise the sound gets weird effects, such as stutters. Now a black/whitelist is introduced to indicate the position_fix value explicitly for such misbehaving hardwares. As a first example, Dell D820 is listed there. More will come later likely... Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/pci/hda/hda_intel.c')
-rw-r--r--sound/pci/hda/hda_intel.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 83d1ba7f33a0..b9a8e238b0a8 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1503,6 +1503,31 @@ static int azx_dev_free(struct snd_device *device)
1503} 1503}
1504 1504
1505/* 1505/*
1506 * white/black-listing for position_fix
1507 */
1508static const struct snd_pci_quirk position_fix_list[] __devinitdata = {
1509 SND_PCI_QUIRK(0x1028, 0x01cc, "Dell D820", POS_FIX_NONE),
1510 {}
1511};
1512
1513static int __devinit check_position_fix(struct azx *chip, int fix)
1514{
1515 const struct snd_pci_quirk *q;
1516
1517 if (fix == POS_FIX_AUTO) {
1518 q = snd_pci_quirk_lookup(chip->pci, position_fix_list);
1519 if (q) {
1520 snd_printdd(KERN_INFO
1521 "hda_intel: position_fix set to %d "
1522 "for device %04x:%04x\n",
1523 q->value, q->subvendor, q->subdevice);
1524 return q->value;
1525 }
1526 }
1527 return fix;
1528}
1529
1530/*
1506 * constructor 1531 * constructor
1507 */ 1532 */
1508static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci, 1533static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
@@ -1536,7 +1561,8 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
1536 chip->driver_type = driver_type; 1561 chip->driver_type = driver_type;
1537 chip->msi = enable_msi; 1562 chip->msi = enable_msi;
1538 1563
1539 chip->position_fix = position_fix; 1564 chip->position_fix = check_position_fix(chip, position_fix);
1565
1540 chip->single_cmd = single_cmd; 1566 chip->single_cmd = single_cmd;
1541 1567
1542#if BITS_PER_LONG != 64 1568#if BITS_PER_LONG != 64