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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
09240cf4 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 <andiry.xu@amd.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 1c55d521

sound/pci/hda/hda_intel.c

+13 −3
Original line number Diff line number Diff line
@@ -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)

	/* 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,

					 PCI_DEVICE_ID_ATI_SBX00_SMBUS,

					 NULL);

		if (p_smbus) {

			if (p_smbus->revision < 0x30)

				gcap &= ~ICH6_GCAP_64OK;

			pci_dev_put(p_smbus);

		}

	}



	/* allow 64bit DMA address if supported by H/W */

	if ((gcap & ICH6_GCAP_64OK) && !pci_set_dma_mask(pci, DMA_BIT_MASK(64)))