[Intel-gfx] [PATCH 1/2] drm/i915: Report the origin of the LVDS fixed panel mode

[Chris Wilson]

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_lvds.c |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 860fa71..5b38c17 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -1083,6 +1083,9 @@ bool intel_lvds_init(struct drm_device *dev)
 
 	list_for_each_entry(scan, &connector->probed_modes, head) {
 		if (scan->type & DRM_MODE_TYPE_PREFERRED) {
+			DRM_DEBUG_KMS("using preferred mode from EDID: ");
+			drm_mode_debug_printmodeline(scan);
+
 			fixed_mode = drm_mode_duplicate(dev, scan);
 			intel_find_lvds_downclock(dev, fixed_mode, connector);
 			goto out;
@@ -1091,6 +1094,9 @@ bool intel_lvds_init(struct drm_device *dev)
 
 	/* Failed to get EDID, what about VBT? */
 	if (dev_priv->lfp_lvds_vbt_mode) {
+		DRM_DEBUG_KMS("using mode from VBT: ");
+		drm_mode_debug_printmodeline(dev_priv->lfp_lvds_vbt_mode);
+
 		fixed_mode = drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
 		if (fixed_mode) {
 			fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
@@ -1115,8 +1121,11 @@ bool intel_lvds_init(struct drm_device *dev)
 	if (crtc && (lvds & LVDS_PORT_EN)) {
 		struct drm_display_mode mode;
 
-		if (intel_crtc_get_mode(crtc, &mode))
+		if (intel_crtc_get_mode(crtc, &mode)) {
+			DRM_DEBUG_KMS("using current (BIOS) mode: ");
+			drm_mode_debug_printmodeline(&mode);
 			fixed_mode = drm_mode_duplicate(dev, &mode);
+		}
 		if (fixed_mode) {
 			fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
 			fixed_mode->flags = intel_lvds_get_mode_flags(intel_encoder);
-- 
1.7.10.4