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: <stable@kernel.org>
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 643f0e4..f3b5723 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2059,26 +2059,31 @@
{
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;
}
/*