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Correct the interrupt handling in the Intel i915 driver.

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Approved by:	jhb (mentor)
This commit is contained in:
Robert Noland 2008-10-13 17:47:13 +00:00
parent af2da6a40e
commit 41c257c7bf
1 changed files with 16 additions and 11 deletions
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27
sys/dev/drm/i915_irq.c
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@ -460,26 +460,31 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
*/
if (iir & I915_DISPLAY_PIPE_A_EVENT_INTERRUPT) {
pipea_stats = I915_READ(PIPEASTAT);
if (pipea_stats & (PIPE_START_VBLANK_INTERRUPT_STATUS|
PIPE_VBLANK_INTERRUPT_STATUS))
/* The vblank interrupt gets enabled even if we didn't ask for
it, so make sure it's shut down again */
if (!(dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_A))
pipea_stats &= ~(PIPE_START_VBLANK_INTERRUPT_ENABLE |
PIPE_VBLANK_INTERRUPT_ENABLE);
else if (pipea_stats & (PIPE_START_VBLANK_INTERRUPT_STATUS|
PIPE_VBLANK_INTERRUPT_STATUS))
{
vblank++;
drm_handle_vblank(dev, i915_get_plane(dev, 0));
}
I915_WRITE(PIPEASTAT, pipea_stats);
}
if (iir & I915_DISPLAY_PIPE_B_EVENT_INTERRUPT) {
pipeb_stats = I915_READ(PIPEBSTAT);
/* Ack the event */
I915_WRITE(PIPEBSTAT, pipeb_stats);
/* The vblank interrupt gets enabled even if we didn't ask for
it, so make sure it's shut down again */
if (!(dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_B))
pipeb_stats &= ~(I915_VBLANK_INTERRUPT_ENABLE);
if (pipeb_stats & (PIPE_START_VBLANK_INTERRUPT_STATUS|
PIPE_VBLANK_INTERRUPT_STATUS))
pipeb_stats &= ~(PIPE_START_VBLANK_INTERRUPT_ENABLE |
PIPE_VBLANK_INTERRUPT_ENABLE);
else if (pipeb_stats & (PIPE_START_VBLANK_INTERRUPT_STATUS|
PIPE_VBLANK_INTERRUPT_STATUS))
{
vblank++;
drm_handle_vblank(dev, i915_get_plane(dev, 1));
@ -950,9 +955,9 @@ void i915_driver_irq_preinstall(struct drm_device * dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
I915_WRITE16(HWSTAM, 0xeffe);
I915_WRITE16(IMR, 0x0);
I915_WRITE16(IER, 0x0);
I915_WRITE(HWSTAM, 0xeffe);
I915_WRITE(IMR, 0xffffffff);
I915_WRITE(IER, 0x0);
}
int i915_driver_irq_postinstall(struct drm_device * dev)