1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f51b5eee30c5..d89dda02777b 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8690,6 +8690,31 @@ void intel_modeset_setup_hw_state(struct drm_device *dev)
         struct intel_encoder *encoder;
         struct intel_connector *connector;
 
+        if (IS_HASWELL(dev)) {
+                tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
+
+                if (tmp & TRANS_DDI_FUNC_ENABLE) {
+                        switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
+                        case TRANS_DDI_EDP_INPUT_A_ON:
+                        case TRANS_DDI_EDP_INPUT_A_ONOFF:
+                                pipe = PIPE_A;
+                                break;
+                        case TRANS_DDI_EDP_INPUT_B_ONOFF:
+                                pipe = PIPE_B;
+                                break;
+                        case TRANS_DDI_EDP_INPUT_C_ONOFF:
+                                pipe = PIPE_C;
+                                break;
+                        }
+
+                        crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
+                        crtc->cpu_transcoder = TRANSCODER_EDP;
+
+                        DRM_DEBUG_KMS("Pipe %c using transcoder EDP\n",
+                                      pipe_name(pipe));
+                }
+        }
+
         for_each_pipe(pipe) {
                 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);