Merge drm/drm-next into drm-misc-next

Backmerging drm/drm-next to get the latest changes in the xlnx driver.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index 62fad16a55e8..f949a9495758 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -1621,6 +1621,20 @@ i915_request_await_object(struct i915_request *to,
 	return ret;
 }
 
+static void i915_request_await_huc(struct i915_request *rq)
+{
+	struct intel_huc *huc = &rq->context->engine->gt->uc.huc;
+
+	/* don't stall kernel submissions! */
+	if (!rcu_access_pointer(rq->context->gem_context))
+		return;
+
+	if (intel_huc_wait_required(huc))
+		i915_sw_fence_await_sw_fence(&rq->submit,
+					     &huc->delayed_load.fence,
+					     &rq->hucq);
+}
+
 static struct i915_request *
 __i915_request_ensure_parallel_ordering(struct i915_request *rq,
 					struct intel_timeline *timeline)
@@ -1703,6 +1717,16 @@ __i915_request_add_to_timeline(struct i915_request *rq)
 	struct i915_request *prev;
 
 	/*
+	 * Media workloads may require HuC, so stall them until HuC loading is
+	 * complete. Note that HuC not being loaded when a user submission
+	 * arrives can only happen when HuC is loaded via GSC and in that case
+	 * we still expect the window between us starting to accept submissions
+	 * and HuC loading completion to be small (a few hundred ms).
+	 */
+	if (rq->engine->class == VIDEO_DECODE_CLASS)
+		i915_request_await_huc(rq);
+
+	/*
 	 * Dependency tracking and request ordering along the timeline
 	 * is special cased so that we can eliminate redundant ordering
 	 * operations while building the request (we know that the timeline