1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 6a92f994cc26..7e17a362b54b 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -278,7 +278,7 @@ static void radeon_print_display_setup(struct drm_device *dev)
                 DRM_INFO("  %s\n", connector_names[connector->connector_type]);
                 if (radeon_connector->hpd.hpd != RADEON_HPD_NONE)
                         DRM_INFO("  %s\n", hpd_names[radeon_connector->hpd.hpd]);
-                if (radeon_connector->ddc_bus)
+                if (radeon_connector->ddc_bus) {
                         DRM_INFO("  DDC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
                                  radeon_connector->ddc_bus->rec.mask_clk_reg,
                                  radeon_connector->ddc_bus->rec.mask_data_reg,
@@ -288,6 +288,15 @@ static void radeon_print_display_setup(struct drm_device *dev)
                                  radeon_connector->ddc_bus->rec.en_data_reg,
                                  radeon_connector->ddc_bus->rec.y_clk_reg,
                                  radeon_connector->ddc_bus->rec.y_data_reg);
+                } else {
+                        if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||
+                            connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
+                            connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
+                            connector->connector_type == DRM_MODE_CONNECTOR_DVIA ||
+                            connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
+                            connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
+                                DRM_INFO("  DDC: no ddc bus - possible BIOS bug - please report to xorg-driver-ati@lists.x.org\n");
+                }
                 DRM_INFO("  Encoders:\n");
                 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
                         radeon_encoder = to_radeon_encoder(encoder);