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drm/i915: Rebind bo if currently bound with incorrect alignment.

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Whilst pinning the buffer, check that that its current alignment
matches the requested alignment. If it does not, rebind.

This should clear up any final render errors whilst resuming,
for reference:

  Bug 27070 - [i915] Page table errors with empty ringbuffer
  https://bugs.freedesktop.org/show_bug.cgi?id=27070

  Bug 15502 -  render error detected, EIR: 0x00000010
  https://bugzilla.kernel.org/show_bug.cgi?id=15502

  Bug 13844 -  i915 error: "render error detected"
  https://bugzilla.kernel.org/show_bug.cgi?id=13844

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@kernel.org
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Chris Wilson
2010-05-27 13:18:18 +01:00
committed by Eric Anholt
parent a7faf32d00
commit ac0c6b5ad3
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/i915/i915_gem.c
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@ -4164,6 +4164,17 @@ i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment)
BUG_ON(obj_priv->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT);
i915_verify_inactive(dev, __FILE__, __LINE__);
if (obj_priv->gtt_space != NULL) {
if (alignment == 0)
alignment = i915_gem_get_gtt_alignment(obj);
if (obj_priv->gtt_offset & (alignment - 1)) {
ret = i915_gem_object_unbind(obj);
if (ret)
return ret;
}
}
if (obj_priv->gtt_space == NULL) {
ret = i915_gem_object_bind_to_gtt(obj, alignment);
if (ret)