| From 09240cf429505891d6123ce14a29f58f2a60121e Mon Sep 17 00:00:00 2001 |
| From: Takashi Iwai <tiwai@suse.de> |
| Date: Tue, 17 Mar 2009 07:47:18 +0100 |
| Subject: ALSA: hda - Fix DMA mask for ATI controllers |
| |
| From: Takashi Iwai <tiwai@suse.de> |
| |
| commit 09240cf429505891d6123ce14a29f58f2a60121e upstream. |
| |
| ATI controllers (at least some SB0600 models) appear buggy to handle |
| 64bit DMA. As a workaround, reset GCAP bit0 and let the driver to |
| use only 32bit DMA on these controllers. |
| |
| Signed-off-by: Takashi Iwai <tiwai@suse.de> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
| |
| --- |
| sound/pci/hda/hda_intel.c | 8 ++++++++ |
| 1 file changed, 8 insertions(+) |
| |
| --- a/sound/pci/hda/hda_intel.c |
| +++ b/sound/pci/hda/hda_intel.c |
| @@ -2208,9 +2208,17 @@ static int __devinit azx_create(struct s |
| gcap = azx_readw(chip, GCAP); |
| snd_printdd("chipset global capabilities = 0x%x\n", gcap); |
| |
| + /* ATI chips seems buggy about 64bit DMA addresses */ |
| + if (chip->driver_type == AZX_DRIVER_ATI) |
| + gcap &= ~0x01; |
| + |
| /* 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); |
| + else { |
| + pci_set_dma_mask(pci, DMA_32BIT_MASK); |
| + pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK); |
| + } |
| |
| /* read number of streams from GCAP register instead of using |
| * hardcoded value |
