diff options
| author | Stephen Hemminger <shemminger@osdl.org> | 2006-08-21 19:17:46 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-09-23 10:42:47 +0200 |
| commit | 7376d013fc6d3a45d748e0ce758ca9412b01b9dd (patch) | |
| tree | ebe54b3ce6e34faf2a1fc8568b754a299174da2d | |
| parent | 93f09c4cc111506db2ffa6220b7a3d7f73e41aa3 (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>
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 10 |
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); |