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 754de4f..20a66f8 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2299,6 +2299,30 @@
}
}
+/*
+ * 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 @@
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);