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From: Greg KH on 22 Apr 2010 16:10
2.6.33-stable review patch. If anyone has any objections, please let us know.

------------------

From: Seth Heasley <seth.heasley(a)intel.com>

commit 32679f95cac3b1bdf27dce8b5273e06af186fd91 upstream.

This patch enables snoop, eliminating static during playback.
This patch supersedes the previous Cougar Point audio patch.

Signed-off-by: Seth Heasley <seth.heasley(a)intel.com>
Signed-off-by: Takashi Iwai <tiwai(a)suse.de>
Cc: maximilian attems <max(a)stro.at>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
sound/pci/hda/hda_intel.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -450,6 +450,7 @@ struct azx {
/* driver types */
enum {
AZX_DRIVER_ICH,
+ AZX_DRIVER_PCH,
AZX_DRIVER_SCH,
AZX_DRIVER_ATI,
AZX_DRIVER_ATIHDMI,
@@ -464,6 +465,7 @@ enum {

static char *driver_short_names[] __devinitdata = {
[AZX_DRIVER_ICH] = "HDA Intel",
+ [AZX_DRIVER_PCH] = "HDA Intel PCH",
[AZX_DRIVER_SCH] = "HDA Intel MID",
[AZX_DRIVER_ATI] = "HDA ATI SB",
[AZX_DRIVER_ATIHDMI] = "HDA ATI HDMI",
@@ -1066,6 +1068,7 @@ static void azx_init_pci(struct azx *chi
0x01, NVIDIA_HDA_ENABLE_COHBIT);
break;
case AZX_DRIVER_SCH:
+ case AZX_DRIVER_PCH:
pci_read_config_word(chip->pci, INTEL_SCH_HDA_DEVC, &snoop);
if (snoop & INTEL_SCH_HDA_DEVC_NOSNOOP) {
pci_write_config_word(chip->pci, INTEL_SCH_HDA_DEVC,
@@ -2434,6 +2437,7 @@ static int __devinit azx_create(struct s
if (bdl_pos_adj[dev] < 0) {
switch (chip->driver_type) {
case AZX_DRIVER_ICH:
+ case AZX_DRIVER_PCH:
bdl_pos_adj[dev] = 1;
break;
default:
@@ -2713,7 +2717,7 @@ static struct pci_device_id azx_ids[] =
/* PCH */
{ PCI_DEVICE(0x8086, 0x3b56), .driver_data = AZX_DRIVER_ICH },
/* CPT */
- { PCI_DEVICE(0x8086, 0x1c20), .driver_data = AZX_DRIVER_ICH },
+ { PCI_DEVICE(0x8086, 0x1c20), .driver_data = AZX_DRIVER_PCH },
/* SCH */
{ PCI_DEVICE(0x8086, 0x811b), .driver_data = AZX_DRIVER_SCH },
/* ATI SB 450/600 */


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