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drm/i915: Zap the GTT mapping when transitioning from untiled to tiled.

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As of 52dc7d32b8, we could leave an old
linear GTT mapping in place, so that apps trying to GTT-mapped write in
tiled data wouldn't get the fence added, and garbage would get displayed.

Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Eric Anholt 2009-07-10 13:02:26 -07:00
parent 901782b21e
commit d05ca30199
3 changed files with 8 additions and 1 deletions
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1
drivers/gpu/drm/i915/i915_drv.h
View file

@ -673,6 +673,7 @@ void i915_gem_free_object(struct drm_gem_object *obj);
int i915_gem_object_pin(struct drm_gem_object *obj, uint32_t alignment);
void i915_gem_object_unpin(struct drm_gem_object *obj);
int i915_gem_object_unbind(struct drm_gem_object *obj);
void i915_gem_release_mmap(struct drm_gem_object *obj);
void i915_gem_lastclose(struct drm_device *dev);
uint32_t i915_get_gem_seqno(struct drm_device *dev);
int i915_gem_object_get_fence_reg(struct drm_gem_object *obj);

2
drivers/gpu/drm/i915/i915_gem.c
View file

@ -1266,7 +1266,7 @@ out_free_list:
* mapping will then trigger a page fault on the next user access, allowing
* fixup by i915_gem_fault().
*/
static void
void
i915_gem_release_mmap(struct drm_gem_object *obj)
{
struct drm_device *dev = obj->dev;

6
drivers/gpu/drm/i915/i915_gem_tiling.c
View file

@ -521,6 +521,12 @@ i915_gem_set_tiling(struct drm_device *dev, void *data,
goto err;
}
/* If we've changed tiling, GTT-mappings of the object
* need to re-fault to ensure that the correct fence register
* setup is in place.
*/
i915_gem_release_mmap(obj);
obj_priv->tiling_mode = args->tiling_mode;
obj_priv->stride = args->stride;
}