At Wed, 8 Jul 2009 13:55:31 +0800,
Andiry Brienza wrote:
>
> HDA driver disabled HD audio 64bit address support for all AMD SB600/SB700/SB800
> platforms with commit 09240cf429505891d6123ce14a29f58f2a60121e 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: Andiry Xu <andiry.xu@xxxxxxx>
Applied now. Thanks.
Takashi
> diff -ruN a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
> --- a/sound/pci/hda/hda_intel.c 2009-07-01 17:14:23.000000000 +0800
> +++ b/sound/pci/hda/hda_intel.c 2009-07-08 10:24:35.000000000 +0800
> @@ -2322,9 +2322,19 @@
> 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,
> + 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)))
>
>
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