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Allow vblank interrupts to remain disabled across VT switch.

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i915_driver_irq_postinstall was forcing vblank interrupts to pipe A when
called with vblank interrupts disabled. This caused vblank interrupts to be
accidentally re-enabled when VT switching the X server. Instead, start the
driver with vblank interrupts enabled on pipe A to support older X servers,
but then leave control over the state to the X server if it is able to do so.
This commit is contained in:
Keith Packard 2007-05-07 09:07:48 -04:00
parent e0056c7eb4
commit e4d163d81a
2 changed files with 4 additions and 5 deletions
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4
shared-core/i915_dma.c
View file

@ -177,6 +177,10 @@ static int i915_initialize(drm_device_t * dev,
*/
dev_priv->allow_batchbuffer = 1;
/* Enable vblank on pipe A for older X servers
*/
dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A;
/* Program Hardware Status Page */
dev_priv->status_page_dmah = drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE,
0xffffffff);

5
shared-core/i915_irq.c
View file

@ -726,9 +726,6 @@ void i915_driver_irq_postinstall(drm_device_t * dev)
INIT_LIST_HEAD(&dev_priv->vbl_swaps.head);
dev_priv->swaps_pending = 0;
if (!dev_priv->vblank_pipe)
dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A;
dev_priv->swaps_lock = SPIN_LOCK_UNLOCKED;
INIT_LIST_HEAD(&dev_priv->vbl_swaps.head);
dev_priv->swaps_pending = 0;
@ -736,8 +733,6 @@ void i915_driver_irq_postinstall(drm_device_t * dev)
dev_priv->user_irq_lock = SPIN_LOCK_UNLOCKED;
dev_priv->user_irq_refcount = 0;
if (!dev_priv->vblank_pipe)
dev_priv->vblank_pipe = DRM_I915_VBLANK_PIPE_A;
i915_enable_interrupt(dev);
DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);