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authorStephen Hemminger <shemminger@osdl.org>2006-08-21 19:17:46 +0200
committerJaroslav Kysela <perex@suse.cz>2006-09-23 10:42:47 +0200
commit7376d013fc6d3a45d748e0ce758ca9412b01b9dd (patch)
treeebe54b3ce6e34faf2a1fc8568b754a299174da2d /sound/pci
parent93f09c4cc111506db2ffa6220b7a3d7f73e41aa3 (diff)
[ALSA] intel_hda: MSI support
Simple patch to enable Message Signalled Interrupts for the HDA Intel audio controller. Tested with: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) High Definition Audio Controller (rev 03) MSI is better because it means audio doesn't end up sharing IRQ with USB. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/hda/hda_intel.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index ce75e07aaa2..c9ae9f77892 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -55,6 +55,7 @@ static char *model;
static int position_fix;
static int probe_mask = -1;
static int single_cmd;
+static int disable_msi;
module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for Intel HD audio interface.");
@@ -68,6 +69,8 @@ module_param(probe_mask, int, 0444);
MODULE_PARM_DESC(probe_mask, "Bitmask to probe codecs (default = -1).");
module_param(single_cmd, bool, 0444);
MODULE_PARM_DESC(single_cmd, "Use single command to communicate with codecs (for debugging only).");
+module_param(disable_msi, int, 0);
+MODULE_PARM_DESC(disable_msi, "Disable Message Signaled Interrupt (MSI)");
/* just for backward compatibility */
@@ -1418,8 +1421,10 @@ static int azx_free(struct azx *chip)
msleep(1);
}
- if (chip->irq >= 0)
+ if (chip->irq >= 0) {
+ pci_disable_msi(chip->pci);
free_irq(chip->irq, (void*)chip);
+ }
if (chip->remap_addr)
iounmap(chip->remap_addr);
@@ -1502,6 +1507,9 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
goto errout;
}
+ if (!disable_msi)
+ pci_enable_msi(pci);
+
if (request_irq(pci->irq, azx_interrupt, IRQF_DISABLED|IRQF_SHARED,
"HDA Intel", (void*)chip)) {
snd_printk(KERN_ERR SFX "unable to grab IRQ %d\n", pci->irq);