[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 <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index b38a5a7..ec3ddda 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1843,6 +1843,10 @@
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