1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 6b1c9a27c27..49b54f05d3c 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -576,7 +576,7 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
                 struct intel_encoder *intel_encoder;
                 struct intel_dp_priv *dp_priv;
 
-                if (!encoder || encoder->crtc != crtc)
+                if (encoder->crtc != crtc)
                         continue;
 
                 intel_encoder = enc_to_intel_encoder(encoder);
@@ -675,10 +675,9 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
         dp_priv->link_configuration[1] = dp_priv->lane_count;
 
         /*
-         * Check for DPCD version > 1.1,
-         * enable enahanced frame stuff in that case
+         * Check for DPCD version > 1.1 and enhanced framing support
          */
-        if (dp_priv->dpcd[0] >= 0x11) {
+        if (dp_priv->dpcd[0] >= 0x11 && (dp_priv->dpcd[2] & DP_ENHANCED_FRAME_CAP)) {
                 dp_priv->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
                 dp_priv->DP |= DP_ENHANCED_FRAMING;
         }
@@ -1208,6 +1207,8 @@ ironlake_dp_detect(struct drm_connector *connector)
                 if (dp_priv->dpcd[0] != 0)
                         status = connector_status_connected;
         }
+        DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\n", dp_priv->dpcd[0],
+                      dp_priv->dpcd[1], dp_priv->dpcd[2], dp_priv->dpcd[3]);
         return status;
 }
 
@@ -1352,7 +1353,7 @@ intel_trans_dp_port_sel (struct drm_crtc *crtc)
         struct intel_encoder *intel_encoder = NULL;
 
         list_for_each_entry(encoder, &mode_config->encoder_list, head) {
-                if (!encoder || encoder->crtc != crtc)
+                if (encoder->crtc != crtc)
                         continue;
 
                 intel_encoder = enc_to_intel_encoder(encoder);