[PATCH] drm/xe/uapi: Add documentation for DRM_XE_GEM_CREATE_FLAG_DEFER_BACKING

[priyanka.dandamudi at intel.com]

From: Priyanka Dandamudi <priyanka.dandamudi at intel.com>

Add documentation for drm_xe_gem_create structure flag
DRM_XE_GEM_CREATE_FLAG_DEFER_BACKING.

v2: Modified to be in a more generalised way.

Signed-off-by: Priyanka Dandamudi <priyanka.dandamudi at intel.com>
---
 include/uapi/drm/xe_drm.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/uapi/drm/xe_drm.h b/include/uapi/drm/xe_drm.h
index e2426413488f..2ceafa5305d2 100644
--- a/include/uapi/drm/xe_drm.h
+++ b/include/uapi/drm/xe_drm.h
@@ -760,7 +760,11 @@ struct drm_xe_device_query {
  * gem creation
  *
  * The @flags can be:
- *  - %DRM_XE_GEM_CREATE_FLAG_DEFER_BACKING
+ *  - %DRM_XE_GEM_CREATE_FLAG_DEFER_BACKING - This flag modifies the GEM
+ *    object allocation strategy by deferring physical memory allocation
+ *    until the object is either bound to a virtual memory region via
+ *    VM_BIND or accessed by the CPU. As a result, no backing memory is
+ *    reserved at the time of GEM object creation.
  *  - %DRM_XE_GEM_CREATE_FLAG_SCANOUT
  *  - %DRM_XE_GEM_CREATE_FLAG_NEEDS_VISIBLE_VRAM - When using VRAM as a
  *    possible placement, ensure that the corresponding VRAM allocation
-- 
2.34.1