From cf7aaca8bae3a719db47ff6eca5f6f2f42eba05a Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 6 Feb 2008 15:05:57 +0100 Subject: [PATCH] [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: Takashi Iwai --- sound/pci/hda/hda_intel.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index b38a5a70ff0..ec3ddda30be 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -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 -- 2.41.1