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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2010-10-28 12:18:07 +0200 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-10-28 13:33:17 +0200 |
| commit | 176f28ebf4303b4f7e3a5bd8be7842a8bbecd9c3 (patch) | |
| tree | 40f64c5d115779aea9661af851c9459741894ea0 /drivers/gpu/drm/i915/intel_ringbuffer.c | |
| parent | drm/i915: Use pci_iomap for remapping the MMIO registers. (diff) | |
| download | linux-176f28ebf4303b4f7e3a5bd8be7842a8bbecd9c3.tar.xz linux-176f28ebf4303b4f7e3a5bd8be7842a8bbecd9c3.zip | |
drm/i915/ringbuffer: Check that we setup the ringbuffer
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 8eaa60cc5d25..e88214ef24b1 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -176,9 +176,10 @@ static int init_ring_common(struct intel_ring_buffer *ring) ((ring->gem_object->size - PAGE_SIZE) & RING_NR_PAGES) | RING_NO_REPORT | RING_VALID); - head = I915_READ_HEAD(ring) & HEAD_ADDR; /* If the head is still not zero, the ring is dead */ - if (head != 0) { + if ((I915_READ_CTL(ring) & RING_VALID) == 0 || + I915_READ_START(ring) != obj_priv->gtt_offset || + (I915_READ_HEAD(ring) & HEAD_ADDR) != 0) { DRM_ERROR("%s initialization failed " "ctl %08x head %08x tail %08x start %08x\n", ring->name, |