ALSA: hda - enable snoop for Intel Cougar Point

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

Signed-off-by: Seth Heasley <seth.heasley@intel.com>
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 22dcdc2..1adac8c 100644 (file)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -448,6 +448,7 @@ struct azx {
 /* driver types */
 enum {
        AZX_DRIVER_ICH,
+       AZX_DRIVER_PCH,
        AZX_DRIVER_SCH,
        AZX_DRIVER_ATI,
        AZX_DRIVER_ATIHDMI,
@@ -462,6 +463,7 @@ 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",
@@ -1064,6 +1066,7 @@ static void azx_init_pci(struct azx *chip)
                                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,
@@ -2421,6 +2424,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
        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:
@@ -2700,7 +2704,7 @@ 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 */