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Commit cf7aaca8 authored by Takashi Iwai's avatar Takashi Iwai
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[ALSA] hda-intel - Support 64bit buffer allocation 



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

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 4ce107b9

sound/pci/hda/hda_intel.c

+4 −0
Original line number Diff line number Diff line
@@ -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