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drm/i915: Move non-phys cursors into the GTT 

Cursors need to be in the GTT domain when being accessed by the GPU.
Previously this was a fortuitous byproduct of userspace using pwrite()
to upload the image data into the cursor. The redundant clflush was
removed in commit 9b8c4a and so the image was no longer being flushed
out of the caches into main memory. One could also devise a scenario
where the cursor was rendered by the GPU, prior to being attached as the
cursor, resulting in similar corruption due to the missing MI_FLUSH.

Fixes:

  Bug 28335 - Cursor corruption caused by commit 9b8c4a0b21
  https://bugs.freedesktop.org/show_bug.cgi?id=28335

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Arkadiusz Miśkiewicz <arekm@maven.pl>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Chris Wilson 2010-06-02 08:41:44 +01:00 committed by Eric Anholt
parent 0d7168bcf4
commit 382fe70fdd
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/i915/intel_display.c
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@ -3978,6 +3978,13 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
DRM_ERROR("failed to pin cursor bo\n");
goto fail_locked;
}
ret = i915_gem_object_set_to_gtt_domain(bo, 0);
if (ret) {
DRM_ERROR("failed to move cursor bo into the GTT\n");
goto fail_unpin;
}
addr = obj_priv->gtt_offset;
} else {
ret = i915_gem_attach_phys_object(dev, bo, (pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1);
@ -4021,6 +4028,8 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
intel_crtc->cursor_bo = bo;
return 0;
fail_unpin:
i915_gem_object_unpin(bo);
fail_locked:
mutex_unlock(&dev->struct_mutex);
fail: