diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 33453d56c386..2959c88a37a5 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1165,6 +1165,12 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv) * get lost on g4x as well, and interrupt delivery seems to stay * properly dead afterwards. So we'll just disable them for all * pre-gen5 chipsets. + * + * dp aux and gmbus irq on gen4 seems to be able to generate legacy + * interrupts even when in MSI mode. This results in spurious + * interrupt warnings if the legacy irq no. is shared with another + * device. The kernel then disables that interrupt source and so + * prevents the other device from working properly. */ if (INTEL_GEN(dev_priv) >= 5) { if (pci_enable_msi(pdev) < 0) |