[PATCH v4 16/16] drm/i915: Annotate more of the BIOS fb takeover failure paths

[Ville Syrjala]

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

Annotate a few more of the failure paths on the initial
BIOS fb takeover to avoid having to guess why things
aren't working the way we expect.

Reviewed-by: Uma Shankar <uma.shankar at intel.com>
Tested-by: Paz Zcharya <pazz at chromium.org>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_plane_initial.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_plane_initial.c b/drivers/gpu/drm/i915/display/intel_plane_initial.c
index b43b8cf4680c..ada1792df5b3 100644
--- a/drivers/gpu/drm/i915/display/intel_plane_initial.c
+++ b/drivers/gpu/drm/i915/display/intel_plane_initial.c
@@ -167,14 +167,19 @@ initial_plane_vma(struct drm_i915_private *i915,
 	 */
 	if (IS_ENABLED(CONFIG_FRAMEBUFFER_CONSOLE) &&
 	    mem == i915->mm.stolen_region &&
-	    size * 2 > i915->dsm.usable_size)
+	    size * 2 > i915->dsm.usable_size) {
+		drm_dbg_kms(&i915->drm, "Initial FB size exceeds half of stolen, discarding\n");
 		return NULL;
+	}
 
 	obj = i915_gem_object_create_region_at(mem, phys_base, size,
 					       I915_BO_ALLOC_USER |
 					       I915_BO_PREALLOC);
-	if (IS_ERR(obj))
+	if (IS_ERR(obj)) {
+		drm_dbg_kms(&i915->drm, "Failed to preallocate initial FB in %s\n",
+			    mem->region.name);
 		return NULL;
+	}
 
 	/*
 	 * Mark it WT ahead of time to avoid changing the
-- 
2.43.0