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drm/i915: Restore GTT mapping first upon resume

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As suggested by Daniel Vetter, this is a safeguard should any of the
registers cause reference to PTE entries.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-12-08 14:26:19 +00:00
parent 4a19d02e0a
commit d1c3b177b9
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/i915/i915_drv.c
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@ -304,13 +304,18 @@ static int i915_drm_thaw(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
int error = 0;
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
mutex_lock(&dev->struct_mutex);
i915_gem_restore_gtt_mappings(dev);
mutex_unlock(&dev->struct_mutex);
}
i915_restore_state(dev);
intel_opregion_setup(dev);
/* KMS EnterVT equivalent */
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
mutex_lock(&dev->struct_mutex);
i915_gem_restore_gtt_mappings(dev);
dev_priv->mm.suspended = 0;
error = i915_gem_init_ringbuffer(dev);