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[intel] Enable MSI for i915 IRQ

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Keith Packard 2008-06-13 10:27:39 -07:00
parent 5957470ca3
commit 3762c9ea67
2 changed files with 31 additions and 6 deletions
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17
linux-core/i915_drv.c
View File

@ -560,6 +560,7 @@ static int i915_resume(struct drm_device *dev)
}
static int probe(struct pci_dev *pdev, const struct pci_device_id *ent);
static void remove(struct pci_dev *pdev);
static struct drm_driver driver = {
/* don't use mtrr's here, the Xserver or user space app should
* deal with them for intel hardware.
@ -604,7 +605,7 @@ static struct drm_driver driver = {
.name = DRIVER_NAME,
.id_table = pciidlist,
.probe = probe,
.remove = __devexit_p(drm_cleanup_pci),
.remove = remove,
},
#ifdef I915_HAVE_FENCE
.fence_driver = &i915_fence_driver,
@ -622,7 +623,19 @@ static struct drm_driver driver = {
static int probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
return drm_get_dev(pdev, ent, &driver);
int ret;
(void) pci_enable_msi(pdev);
ret = drm_get_dev(pdev, ent, &driver);
if (ret && pdev->msi_enabled)
pci_disable_msi(pdev);
return ret;
}
static void remove(struct pci_dev *pdev)
{
if (pdev->msi_enabled)
pci_disable_msi(pdev);
drm_cleanup_pci(pdev);
}
static int __init i915_init(void)

20
shared-core/i915_irq.c
View File

@ -33,6 +33,13 @@
#define MAX_NOPID ((u32)~0)
/*
* These are the interrupts used by the driver
*/
#define I915_INTERRUPT_ENABLE_MASK (I915_USER_INTERRUPT | \
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | \
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT)
/**
* i915_get_pipe - return the the pipe associated with a given plane
* @dev: DRM device
@ -443,6 +450,8 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
u32 pipea_stats = 0, pipeb_stats = 0;
int vblank = 0;
if (dev->pdev->msi_enabled)
I915_WRITE(I915REG_INT_ENABLE_R, 0);
iir = I915_READ(I915REG_INT_IDENTITY_R);
#if 0
DRM_DEBUG("flag=%08x\n", iir);
@ -454,6 +463,9 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
I915_READ(I915REG_INT_ENABLE_R),
I915_READ(I915REG_PIPEASTAT),
I915_READ(I915REG_PIPEBSTAT));
if (dev->pdev->msi_enabled)
I915_WRITE(I915REG_INT_ENABLE_R,
I915_INTERRUPT_ENABLE_MASK);
return IRQ_NONE;
}
@ -498,6 +510,8 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
drm_locked_tasklet(dev, i915_vblank_tasklet);
}
if (dev->pdev->msi_enabled)
I915_WRITE(I915REG_INT_ENABLE_R, I915_INTERRUPT_ENABLE_MASK);
return IRQ_HANDLED;
}
@ -724,11 +738,9 @@ static void i915_enable_interrupt (struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
dev_priv->irq_mask_reg = (I915_USER_INTERRUPT |
I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
I915_DISPLAY_PIPE_B_EVENT_INTERRUPT);
dev_priv->irq_mask_reg = I915_INTERRUPT_ENABLE_MASK;
I915_WRITE(I915REG_INT_MASK_R, dev_priv->irq_mask_reg);
I915_WRITE(I915REG_INT_ENABLE_R, dev_priv->irq_mask_reg);
I915_WRITE(I915REG_INT_ENABLE_R, I915_INTERRUPT_ENABLE_MASK);
(void) I915_READ (I915REG_INT_ENABLE_R);
dev_priv->irq_enabled = 1;
}