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drm/i915: Avoid nesting of domain changes when setting display plane

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Nesting domain changes will cause confusion when trying to interpret the
tracepoints describing the sequence of changes for the object, as well
as obscuring the order of operations for the reader of the code.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Chris Wilson 2010-05-27 13:18:14 +01:00 committed by Eric Anholt
parent 468f0b44ce
commit b118c1e363
1 changed files with 3 additions and 5 deletions
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8
drivers/gpu/drm/i915/i915_gem.c
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@ -2914,18 +2914,16 @@ i915_gem_object_set_to_display_plane(struct drm_gem_object *obj)
return ret;
}
i915_gem_object_flush_cpu_write_domain(obj);
old_write_domain = obj->write_domain;
old_read_domains = obj->read_domains;
obj->read_domains &= I915_GEM_DOMAIN_GTT;
i915_gem_object_flush_cpu_write_domain(obj);
/* It should now be out of any other write domains, and we can update
* the domain values for our changes.
*/
BUG_ON((obj->write_domain & ~I915_GEM_DOMAIN_GTT) != 0);
obj->read_domains |= I915_GEM_DOMAIN_GTT;
obj->read_domains = I915_GEM_DOMAIN_GTT;
obj->write_domain = I915_GEM_DOMAIN_GTT;
obj_priv->dirty = 1;