[PATCH 2/4] drm/i915/fb: Add debug spew for misaligned CC plane

[Ville Syrjala]

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

We're currently failing to provide any debug output when the
user passes in a misaligned offset for the clear color plane.
Add some debugs prints to make debugging actually possible.

Cc: Sagar Ghuge <sagar.ghuge at intel.com>
Cc: Nanley Chery <nanley.g.chery at intel.com>
Cc: Xi Ruoyao <xry111 at xry111.site>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_fb.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
index 223c4218c019..e478d412785e 100644
--- a/drivers/gpu/drm/i915/display/intel_fb.c
+++ b/drivers/gpu/drm/i915/display/intel_fb.c
@@ -1694,10 +1694,14 @@ int intel_fill_fb_info(struct drm_i915_private *i915, struct intel_framebuffer *
 		 * arithmetic related to alignment and offset calculation.
 		 */
 		if (is_gen12_ccs_cc_plane(&fb->base, i)) {
-			if (IS_ALIGNED(fb->base.offsets[i], 64))
-				continue;
-			else
+			if (!IS_ALIGNED(fb->base.offsets[i], 64)) {
+				drm_dbg_kms(&i915->drm,
+					    "fb misaligned clear color plane %d offset (0x%x)\n",
+					    i, fb->base.offsets[i]);
 				return -EINVAL;
+			}
+
+			continue;
 		}
 
 		intel_fb_plane_dims(fb, i, &width, &height);
-- 
2.45.2