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[ALSA] hda-intel - Support 64bit buffer allocation

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The HD-audio hardware usually supports 64bit address for DMA and other
buffers.  The patch enables the feature if supported.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2008-02-06 15:05:57 +01:00
parent 4ce107b990
commit cf7aaca8ba
1 changed files with 4 additions and 0 deletions
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4
sound/pci/hda/hda_intel.c
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@ -1843,6 +1843,10 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
gcap = azx_readw(chip, GCAP);
snd_printdd("chipset global capabilities = 0x%x\n", gcap);
/* allow 64bit DMA address if supported by H/W */
if ((gcap & 0x01) && !pci_set_dma_mask(pci, DMA_64BIT_MASK))
pci_set_consistent_dma_mask(pci, DMA_64BIT_MASK);
if (gcap) {
/* read number of streams from GCAP register instead of using
* hardcoded value