linux-kernel - [PATCH linux-2.6] hda_intel: ALSA HD Audio patch for Intel Cougar Point DeviceIDs, enables snoop

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Date:	Mon, 22 Feb 2010 17:31:09 -0800
From:	Seth Heasley <seth.heasley@...el.com>
To:	perex@...ex.cz
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	tiwai@...e.de, seth.heasley@...el.com
Subject: [PATCH linux-2.6] hda_intel: ALSA HD Audio patch for Intel Cougar Point DeviceIDs, enables snoop

This patch adds the Intel Cougar Point (PCH) HD Audio Controller DeviceIDs, and enables snoop, eliminating static during
playback.  This patch supersedes the previous Cougar Point audio patch.

Signed-off-by: Seth Heasley <seth.heasley@...el.com>

--- sound/pci/hda/hda_intel.c.orig	2010-02-11 11:37:43.000000000 -0800
+++ sound/pci/hda/hda_intel.c	2010-02-22 10:05:48.000000000 -0800
@@ -449,6 +449,7 @@
 /* driver types */
 enum {
 	AZX_DRIVER_ICH,
+	AZX_DRIVER_PCH,
 	AZX_DRIVER_SCH,
 	AZX_DRIVER_ATI,
 	AZX_DRIVER_ATIHDMI,
@@ -463,6 +464,7 @@
 
 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",
@@ -1065,6 +1067,7 @@
 				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,
@@ -2415,6 +2418,7 @@
 	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:
@@ -2693,6 +2697,7 @@
 	{ PCI_DEVICE(0x8086, 0x3a6e), .driver_data = AZX_DRIVER_ICH },
 	/* PCH */
 	{ PCI_DEVICE(0x8086, 0x3b56), .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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