From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 11 Aug 2009 12:21:26 +0000 (+0200)
Subject: ALSA: hda - Add a white-list for MSI option
X-Git-Tag: v2.6.32-rc1~732^2~13^2~34
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=4d8e22e0f6aacb365db2cb9bf69e38310b37f418;ds=sidebyside

ALSA: hda - Add a white-list for MSI option

Created a white-list to enable MSI since some devices require MSI
explicitly due to BIOS/ACPI problems.  Simply using a quirk list.
As the first case, take HP Compaq CQ40.

Reference: Novell bnc#529971
	https://bugzilla.novell.com/show_bug.cgi?id=529971

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 754de4f82013..20a66f85f0a4 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2299,6 +2299,30 @@ static void __devinit check_probe_mask(struct azx *chip, int dev)
 	}
 }
 
+/*
+ * white-list for enable_msi
+ */
+static struct snd_pci_quirk msi_white_list[] __devinitdata = {
+	SND_PCI_QUIRK(0x103c, 0x3607, "HP Compa CQ40", 1),
+	{}
+};
+
+static void __devinit check_msi(struct azx *chip)
+{
+	const struct snd_pci_quirk *q;
+
+	chip->msi = enable_msi;
+	if (chip->msi)
+		return;
+	q = snd_pci_quirk_lookup(chip->pci, msi_white_list);
+	if (q) {
+		printk(KERN_INFO
+		       "hda_intel: msi for device %04x:%04x set to %d\n",
+		       q->subvendor, q->subdevice, q->value);
+		chip->msi = q->value;
+	}
+}
+
 
 /*
  * constructor
@@ -2333,7 +2357,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
 	chip->pci = pci;
 	chip->irq = -1;
 	chip->driver_type = driver_type;
-	chip->msi = enable_msi;
+	check_msi(chip);
 	chip->dev_index = dev;
 	INIT_WORK(&chip->irq_pending_work, azx_irq_pending_work);