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authorKeith Packard <keithp@keithp.com>2008-12-08 11:12:28 -0800
committerDave Airlie <airlied@redhat.com>2008-12-09 15:37:24 +1000
commitb60678a75d44fa9d5969f79781bd856ad5858609 (patch)
tree2bdc4a7f9a3a89cfd83555327185a36399426b51 /drivers
parent15c35334c9b7a11f66ddf7fea9367884e1f5414f (diff)
drm/i915: Disable the GM965 MSI errata workaround.
Since applying the fix suggested by the errata (disabling MSI), we've had issues with interrupts being stuck on despite IIR being 0 on GM965 hardware. Most reporters of the issue have confirmed that turning MSI back on fixes things, and given the difficulties experienced in getting reliable MSI working on Linux, it's believable that the errata was about software issues and not actual hardware issues. Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/i915/i915_dma.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index ba89b42f790..553dd4bc307 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -847,9 +847,10 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
* and the registers being closely associated.
*
* According to chipset errata, on the 965GM, MSI interrupts may
- * be lost or delayed
+ * be lost or delayed, but we use them anyways to avoid
+ * stuck interrupts on some machines.
*/
- if (!IS_I945G(dev) && !IS_I945GM(dev) && !IS_I965GM(dev))
+ if (!IS_I945G(dev) && !IS_I945GM(dev))
pci_enable_msi(dev->pdev);
intel_opregion_init(dev);