Add some debug info related with output/crtc.
---
 drivers/gpu/drm/drm_crtc_helper.c |    7 +++++++
 drivers/gpu/drm/i915/intel_sdvo.c |    2 ++
 2 files changed, 9 insertions(+)

Index: linux-2.6/drivers/gpu/drm/i915/intel_sdvo.c
===================================================================
--- linux-2.6.orig/drivers/gpu/drm/i915/intel_sdvo.c	2010-02-06 17:22:38.000000000 +0800
+++ linux-2.6/drivers/gpu/drm/i915/intel_sdvo.c	2010-02-06 17:52:46.000000000 +0800
@@ -2768,6 +2768,8 @@
 	intel_sdvo_get_input_pixel_clock_range(intel_output,
 					       &sdvo_priv->pixel_clock_min,
 					       &sdvo_priv->pixel_clock_max);
+	printk("possible CRTC mask 0x%x for SDVO%c\n",
+			intel_output->crtc_mask, (output_device == SDVOB) ? 'B' : 'C');
 
 
 	DRM_DEBUG_KMS("%s device VID/DID: %02X:%02X.%02X, "
Index: linux-2.6/drivers/gpu/drm/drm_crtc_helper.c
===================================================================
--- linux-2.6.orig/drivers/gpu/drm/drm_crtc_helper.c	2010-02-06 17:22:38.000000000 +0800
+++ linux-2.6/drivers/gpu/drm/drm_crtc_helper.c	2010-02-06 17:41:40.000000000 +0800
@@ -537,6 +537,8 @@
 		struct drm_crtc *crtc = crtcs[i];
 
 		if (connector->encoder == NULL) {
+			printk("No encoder is found for %s\n",
+				drm_get_connector_name(connector));
 			i++;
 			continue;
 		}
@@ -544,9 +546,14 @@
 		if (mode && crtc) {
 			DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
 				  mode->name, crtc->base.id);
+			printk("possible crtc mask %x for %s\n",
+				connector->encoder->possible_crtcs, 
+				drm_get_connector_name(connector));
 			crtc->desired_mode = mode;
 			connector->encoder->crtc = crtc;
 		} else {
+			printk("No mode or crtc is found for %s\n",
+					drm_get_connector_name(connector));
 			connector->encoder->crtc = NULL;
 			connector->encoder = NULL;
 		}