Commit dc4c2e6b authored by Andiry Brienza's avatar Andiry Brienza Committed by Takashi Iwai
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ALSA: hda - Disable AMD SB600 64bit address support only

HDA driver disabled HD audio 64bit address support for all AMD
SB600/SB700/SB800 platforms with commit

 due to one SB600 issue
reported by community, but we do not see the similar issue on
SB700/SB800 platforms.
This patch is to refine the workaround for SB600 only.

Signed-off-by: default avatarAndiry Xu <>
Signed-off-by: default avatarTakashi Iwai <>
parent 1c55d521
......@@ -2333,9 +2333,19 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
gcap = azx_readw(chip, GCAP);
snd_printdd(SFX "chipset global capabilities = 0x%x\n", gcap);
/* ATI chips seems buggy about 64bit DMA addresses */
if (chip->driver_type == AZX_DRIVER_ATI)
gcap &= ~ICH6_GCAP_64OK;
/* disable SB600 64bit support for safety */
if ((chip->driver_type == AZX_DRIVER_ATI) ||
(chip->driver_type == AZX_DRIVER_ATIHDMI)) {
struct pci_dev *p_smbus;
p_smbus = pci_get_device(PCI_VENDOR_ID_ATI,
if (p_smbus) {
if (p_smbus->revision < 0x30)
gcap &= ~ICH6_GCAP_64OK;
/* allow 64bit DMA address if supported by H/W */
if ((gcap & ICH6_GCAP_64OK) && !pci_set_dma_mask(pci, DMA_BIT_MASK(64)))
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