From 09240cf429505891d6123ce14a29f58f2a60121e Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 17 Mar 2009 07:47:18 +0100 Subject: ALSA: hda - Fix DMA mask for ATI controllers 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. Cc: Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_intel.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'sound') diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 5e909e0da04b..643f0e499292 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -2210,9 +2210,17 @@ 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); + /* 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 -- cgit v1.2.1 From c673ba1c23941173c16ff24c7cb34199e826c8b5 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 17 Mar 2009 07:49:14 +0100 Subject: ALSA: hda - Workaround for buggy DMA position on ATI controllers The position-buffer on ATI controllers are unreliable as well as on VIA chips, thus the same workaround for DMA position reading as VIA is useful for ATI. Cc: Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_intel.c | 31 ++++++++++++++++++------------- 1 file changed, 18 insertions(+), 13 deletions(-) (limited to 'sound') diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 643f0e499292..f3b5723c2859 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -2059,26 +2059,31 @@ static int __devinit check_position_fix(struct azx *chip, int fix) { const struct snd_pci_quirk *q; - /* Check VIA HD Audio Controller exist */ - if (chip->pci->vendor == PCI_VENDOR_ID_VIA && - chip->pci->device == VIA_HDAC_DEVICE_ID) { + switch (fix) { + case POS_FIX_LPIB: + case POS_FIX_POSBUF: + return fix; + } + + /* Check VIA/ATI HD Audio Controller exist */ + switch (chip->driver_type) { + case AZX_DRIVER_VIA: + case AZX_DRIVER_ATI: chip->via_dmapos_patch = 1; /* Use link position directly, avoid any transfer problem. */ return POS_FIX_LPIB; } chip->via_dmapos_patch = 0; - if (fix == POS_FIX_AUTO) { - q = snd_pci_quirk_lookup(chip->pci, position_fix_list); - if (q) { - printk(KERN_INFO - "hda_intel: position_fix set to %d " - "for device %04x:%04x\n", - q->value, q->subvendor, q->subdevice); - return q->value; - } + q = snd_pci_quirk_lookup(chip->pci, position_fix_list); + if (q) { + printk(KERN_INFO + "hda_intel: position_fix set to %d " + "for device %04x:%04x\n", + q->value, q->subvendor, q->subdevice); + return q->value; } - return fix; + return POS_FIX_AUTO; } /* -- cgit v1.2.1