[igt-dev] [PATCH i-g-t 1/3] lib/igt_gt: Add gem_engine_can_block_ggtt_binder

[Nirmoy Das <nirmoy.das@intel.com>]

On MTL GGTT updates happens through MI_UPDATE_GGTT command.
Add a method to detect if a engine can block ggtt binder.

Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
---
 lib/igt_gt.c | 15 +++++++++++++++
 lib/igt_gt.h |  2 ++
 2 files changed, 17 insertions(+)

diff --git a/lib/igt_gt.c b/lib/igt_gt.c
index a24a566c7..aa5e75b07 100644
--- a/lib/igt_gt.c
+++ b/lib/igt_gt.c
@@ -659,3 +659,18 @@ int gem_execbuf_flags_to_engine_class(unsigned int flags)
 		igt_assert(0);
 	}
 }
+
+/**
+ * gem_engine_can_block_ggtt_binder:
+ * @fd: open i915 drm file descriptor
+ * @engine: engine to be assessed
+ *
+ * Detect if the platform needs blitter based GGTT
+ * updates.
+ */
+bool gem_engine_can_block_ggtt_binder(int fd,
+		const struct intel_execution_engine2 *engine)
+{
+	return IS_METEORLAKE(intel_get_drm_devid(fd)) &&
+		engine->class == I915_ENGINE_CLASS_COPY;
+}
diff --git a/lib/igt_gt.h b/lib/igt_gt.h
index 3d10349e4..d0c5510b1 100644
--- a/lib/igt_gt.h
+++ b/lib/igt_gt.h
@@ -83,5 +83,7 @@ extern const struct intel_execution_engine2 {
 } intel_execution_engines2[];
 
 int gem_execbuf_flags_to_engine_class(unsigned int flags);
+bool gem_engine_can_block_ggtt_binder(int fd,
+		const struct intel_execution_engine2 *engine);
 
 #endif /* IGT_GT_H */
-- 
2.41.0