From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Fri, 29 Nov 2024 06:50:12 +0000 (+0200)
Subject: drm/i915/fb: Add debug spew for misaligned CC plane
X-Git-Tag: v6.15-rc1~120^2~16^2~263
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0bd39e303ee705c4b0549e2826c42c1d7b849898;p=thirdparty%2Fkernel%2Flinux.git

drm/i915/fb: Add debug spew for misaligned CC plane

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@intel.com>
Cc: Nanley Chery <nanley.g.chery@intel.com>
Cc: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241129065014.8363-3-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
---

diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
index 223c4218c019d..e478d412785e3 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);