This is a note to let you know that I've just added the patch titled
ALSA: hda - Use LPIB for ATI/AMD chipsets as default
to the 2.6.39-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-hda-use-lpib-for-ati-amd-chipsets-as-default.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 50e3bbf9898840eead86f90a43b3625a2b2f4112 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <[email protected]>
Date: Fri, 20 May 2011 16:29:09 +0200
Subject: ALSA: hda - Use LPIB for ATI/AMD chipsets as default
From: Takashi Iwai <[email protected]>
commit 50e3bbf9898840eead86f90a43b3625a2b2f4112 upstream.
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 <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
sound/pci/hda/hda_intel.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2349,9 +2349,16 @@ static int __devinit check_position_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;
Patches currently in stable-queue which might be from [email protected] are
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