linux-kernel - [PATCH 1/1] hda_intel: switch Intel chipsets to COMBO position

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Message-Id: <1339543800-10834-1-git-send-email-seth.heasley@intel.com>
Date:	Tue, 12 Jun 2012 16:30:00 -0700
From:	Seth Heasley <seth.heasley@...el.com>
To:	Takashi Iwai <tiwai@...e.de>, Jaroslav Kysela <perex@...ex.cz>,
	David Henningsson <david.henningsson@...onical.com>
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	James Ralston <james.d.ralston@...el.com>,
	Seth Heasley <seth.heasley@...el.com>
Subject: [PATCH 1/1] hda_intel: switch Intel chipsets to COMBO position_fix

This patch implements the COMBO position_fix for recent Intel client chipsets.

Signed-off-by: Seth Heasley <seth.heasley@...el.com>
---
 sound/pci/hda/hda_intel.c |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 2b6392b..466a88c 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -535,6 +535,7 @@ enum {
 #define AZX_DCAPS_BUFSIZE	(1 << 21)	/* no buffer size alignment */
 #define AZX_DCAPS_ALIGN_BUFSIZE	(1 << 22)	/* buffer size alignment */
 #define AZX_DCAPS_4K_BDLE_BOUNDARY (1 << 23)	/* BDLE in 4k boundary */
+#define AZX_DCAPS_POSFIX_COMBO  (1 << 24)	/* Use COMBO as default */
 
 /* quirks for ATI SB / AMD Hudson */
 #define AZX_DCAPS_PRESET_ATI_SB \
@@ -2728,6 +2729,10 @@ static int __devinit check_position_fix(struct azx *chip, int fix)
 		snd_printd(SFX "Using LPIB position fix\n");
 		return POS_FIX_LPIB;
 	}
+	if (chip->driver_caps & AZX_DCAPS_POSFIX_COMBO) {
+		snd_printd(SFX "Using COMBO position fix\n");
+		return POS_FIX_COMBO;
+	}
 	return POS_FIX_AUTO;
 }
 
@@ -3240,7 +3245,7 @@ static DEFINE_PCI_DEVICE_TABLE(azx_ids) = {
 	/* CPT */
 	{ PCI_DEVICE(0x8086, 0x1c20),
 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_SCH_SNOOP |
-	  AZX_DCAPS_BUFSIZE },
+	  AZX_DCAPS_BUFSIZE | AZX_DCAPS_POSFIX_COMBO },
 	/* PBG */
 	{ PCI_DEVICE(0x8086, 0x1d20),
 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_SCH_SNOOP |
@@ -3248,11 +3253,11 @@ static DEFINE_PCI_DEVICE_TABLE(azx_ids) = {
 	/* Panther Point */
 	{ PCI_DEVICE(0x8086, 0x1e20),
 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_SCH_SNOOP |
-	  AZX_DCAPS_BUFSIZE},
+	  AZX_DCAPS_BUFSIZE | AZX_DCAPS_POSFIX_COMBO },
 	/* Lynx Point */
 	{ PCI_DEVICE(0x8086, 0x8c20),
 	  .driver_data = AZX_DRIVER_PCH | AZX_DCAPS_SCH_SNOOP |
-	  AZX_DCAPS_BUFSIZE},
+	  AZX_DCAPS_BUFSIZE | AZX_DCAPS_POSFIX_COMBO },
 	/* SCH */
 	{ PCI_DEVICE(0x8086, 0x811b),
 	  .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_SCH_SNOOP |
-- 
1.7.4.4

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