[PATCH 08/14] drm/xe: Print a debug message if we have no stolen for the initial FB

[Ville Syrjala <ville.syrjala@linux.intel.com>]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Inform the poor sop reading the logs why the initial FB was rejected
if there is no stolen memory.

Technically this should perhaps be an error since the plane is known
to be enabled at this point, and if there is no stolen then it clearly
can't be scanning out from anywhere. But maybe there are some
virtualization passthrough cases and whatnot where we might not be
able to get access to stolen, so keep it as debug (same as i915).

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/xe/display/xe_initial_plane.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/display/xe_initial_plane.c b/drivers/gpu/drm/xe/display/xe_initial_plane.c
index 14ac4cd8b7ff..b7e0685351bb 100644
--- a/drivers/gpu/drm/xe/display/xe_initial_plane.c
+++ b/drivers/gpu/drm/xe/display/xe_initial_plane.c
@@ -67,10 +67,14 @@ initial_plane_bo(struct xe_device *xe,
 			    "Using phys_base=%pa, based on initial plane programming\n",
 			    &phys_base);
 	} else {
-		struct ttm_resource_manager *stolen = ttm_manager_type(&xe->ttm, XE_PL_STOLEN);
+		struct ttm_resource_manager *stolen;
 
-		if (!stolen)
+		stolen = ttm_manager_type(&xe->ttm, XE_PL_STOLEN);
+		if (!stolen) {
+			drm_dbg_kms(&xe->drm, "No stolen for initial FB\n");
 			return NULL;
+		}
+
 		phys_base = base;
 		flags |= XE_BO_FLAG_STOLEN;
 	}
-- 
2.52.0