commit 6c76e0b94e484ffbdf38d2fe2769b6ca9aa99de4
Author: Thomas Bächler <thomas@archlinux.org>
Date:   Mon Oct 31 19:16:18 2011 +0100

    Change accidental error message to debug message.
    
    According to https://lkml.org/lkml/2011/9/19/80, this is not supposed
    to be an error message, but a debug message. This worries users.

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 04411ad..02d5794 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5172,7 +5172,7 @@ static void ironlake_update_pch_refclk(struct drm_device *dev)
 		} else {
 			/* Enable SSC on PCH eDP if needed */
 			if (intel_panel_use_ssc(dev_priv)) {
-				DRM_ERROR("enabling SSC on PCH\n");
+				DRM_DEBUG("enabling SSC on PCH\n");
 				temp |= DREF_SUPERSPREAD_SOURCE_ENABLE;
 			}
 		}