[Intel-gfx] [PATCH 3/7] drm/i915: Add debug message for FB plane[0].offset!=0 error

[Imre Deak]

Print a debug message if the FB plane[0] offset is not 0 as expected, to
help understainding an add FB IOCTL fail.

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Mika Kahola <mika.kahola at intel.com>
Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index bbc9cf288067..2c2450d3469b 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -16912,8 +16912,11 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
 	}
 
 	/* FIXME need to adjust LINOFF/TILEOFF accordingly. */
-	if (mode_cmd->offsets[0] != 0)
+	if (mode_cmd->offsets[0] != 0) {
+		DRM_DEBUG_KMS("plane 0 offset (0x%08x) must be 0\n",
+			      mode_cmd->offsets[0]);
 		goto err;
+	}
 
 	drm_helper_mode_fill_fb_struct(&dev_priv->drm, fb, mode_cmd);
 
-- 
2.23.1