ALSA: hda - Terradici HDA controllers does not support 64-bit mode

Confirmed from vendor and tests in RedHat bugzilla #536782 .

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index d822bfc6cad6..efcc4f7c57f2 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2450,6 +2450,11 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
                 }
         }
 
+        /* disable 64bit DMA address for Teradici */
+        /* it does not work with device 6549:1200 subsys e4a2:040b */
+        if (chip->driver_type == AZX_DRIVER_TERA)
+                gcap &= ~ICH6_GCAP_64OK;
+
         /* allow 64bit DMA address if supported by H/W */
         if ((gcap & ICH6_GCAP_64OK) && !pci_set_dma_mask(pci, DMA_BIT_MASK(64)))
                 pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(64));