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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2011-01-23 13:03:24 (GMT) |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2011-01-24 18:26:31 (GMT) |
| commit | 5a9a8d1a99c617df82339456fbdd30d6ed3a856b (patch) | |
| tree | 0aa92fdfa778a05353cbe82d4635597ba9e87114 /drivers/gpu | |
| parent | 3885c6bbd0c6c9cc3c8e6d4f723abc87c593b07a (diff) | |
| download | linux-fsl-qoriq-5a9a8d1a99c617df82339456fbdd30d6ed3a856b.tar.xz | |
drm/i915: Handle the no-interrupts case for UMS by polling
If the driver calls into the kernel to wait for a breadcrumb to pass,
but hasn't enabled interrupts, fallback to polling the breadcrumb value.
Reported-by: Chris Clayton <chris2553@googlemail.com>
Tested-by: Chris Clayton <chris2553@googlemail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 98106b7..4b5a35c 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1293,12 +1293,12 @@ static int i915_wait_irq(struct drm_device * dev, int irq_nr) if (master_priv->sarea_priv) master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; - ret = -ENODEV; if (ring->irq_get(ring)) { DRM_WAIT_ON(ret, ring->irq_queue, 3 * DRM_HZ, READ_BREADCRUMB(dev_priv) >= irq_nr); ring->irq_put(ring); - } + } else if (wait_for(READ_BREADCRUMB(dev_priv) >= irq_nr, 3000)) + ret = -EBUSY; if (ret == -EBUSY) { DRM_ERROR("EBUSY -- rec: %d emitted: %d\n", |