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ALSA: hda - Use LPIB for ATI/AMD chipsets as default

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ATI and AMD chipsets seem not providing the proper position-buffer
information, and it also doesn't provide FIFO register required by
VIACOMBO fix.  It's better to use LPIB for these.

Reported-by: David Henningsson <david.henningsson@canonical.com>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2011-05-20 16:29:09 +02:00
commit 50e3bbf989
1 changed files with 8 additions and 1 deletions
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9
sound/pci/hda/hda_intel.c
View file

@ -2367,9 +2367,16 @@ static int __devinit check_position_fix(struct azx *chip, int fix)
/* Check VIA/ATI HD Audio Controller exist */
switch (chip->driver_type) {
case AZX_DRIVER_VIA:
case AZX_DRIVER_ATI:
/* Use link position directly, avoid any transfer problem. */
return POS_FIX_VIACOMBO;
case AZX_DRIVER_ATI:
/* ATI chipsets don't work well with position-buffer */
return POS_FIX_LPIB;
case AZX_DRIVER_GENERIC:
/* AMD chipsets also don't work with position-buffer */
if (chip->pci->vendor == PCI_VENDOR_ID_AMD)
return POS_FIX_LPIB;
break;
}
return POS_FIX_AUTO;