1 files changed, 15 insertions, 4 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 933c5c39654d..cfb2c8f88890 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -1549,6 +1549,8 @@ out:
 static int radeon_dp_mode_valid(struct drm_connector *connector,
                                   struct drm_display_mode *mode)
 {
+        struct drm_device *dev = connector->dev;
+        struct radeon_device *rdev = dev->dev_private;
         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
         struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;
 
@@ -1579,14 +1581,23 @@ static int radeon_dp_mode_valid(struct drm_connector *connector,
                                         return MODE_PANEL;
                         }
                 }
-                return MODE_OK;
         } else {
                 if ((radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
-                    (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP))
+                    (radeon_dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP)) {
                         return radeon_dp_mode_valid_helper(connector, mode);
-                else
-                        return MODE_OK;
+                } else {
+                        if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector->edid)) {
+                                /* HDMI 1.3+ supports max clock of 340 Mhz */
+                                if (mode->clock > 340000)
+                                        return MODE_CLOCK_HIGH;
+                        } else {
+                                if (mode->clock > 165000)
+                                        return MODE_CLOCK_HIGH;
+                        }
+                }
         }
+
+        return MODE_OK;
 }
 
 static const struct drm_connector_helper_funcs radeon_dp_connector_helper_funcs = {