On 05.10.2022 14:11, Thomas Hellström wrote:

Commit 39a2bd34c933 ("drm/i915: Use the vma resource as argument for gtt binding / unbinding") introduced a regression that due to the vma resource tracking of the binding state, dpt ptes were not correctly repopulated. Fix this by clearing the vma resource state before repopulating. The state will subsequently be restored by the bind_vma operation.

Fixes: 39a2bd34c933 ("drm/i915: Use the vma resource as argument for gtt binding / unbinding") Signed-off-by: Thomas Hellström thomas.hellstrom@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20220912121957.31310-1-thomas.... Cc: Matthew Auld matthew.auld@intel.com Cc: intel-gfx@lists.freedesktop.org Cc: stable@vger.kernel.org # v5.18+ Reported-and-tested-by: Kevin Boulain kevinboulain@gmail.com Tested-by: David de Sousa davidesousa@gmail.com

---

drivers/gpu/drm/i915/gt/intel_ggtt.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c b/drivers/gpu/drm/i915/gt/intel_ggtt.c index b31fe0fb013f..5c67e49aacf6 100644 --- a/drivers/gpu/drm/i915/gt/intel_ggtt.c +++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c @@ -1275,10 +1275,16 @@ bool i915_ggtt_resume_vm(struct i915_address_space *vm) atomic_read(&vma->flags) & I915_VMA_BIND_MASK; GEM_BUG_ON(!was_bound);

• if (!retained_ptes)
  

• if (!retained_ptes) {
  

• 	/*
  

• 	 * Clear the bound flags of the vma resource to allow
  

• 	 * ptes to be repopulated.
  

• 	 */
  

• 	vma->resource->bound_flags = 0;
  

Personally I would put this at suspend path, if possible. Anyway: Reviewed-by: Andrzej Hajda andrzej.hajda@intel.com

Regards Andrzej

	vma->ops->bind_vma(vm, NULL, vma->resource,
			   obj ? obj->cache_level : 0,
			   was_bound);

• }
  

  if (obj) { /* only used during resume => exclusive access */ write_domain_objs |= fetch_and_zero(&obj->write_domain); obj->read_domains |= I915_GEM_DOMAIN_GTT;