[PATCH 04/14] drm/i915: check TRANSCODER_EDP on intel_modeset_setup_hw_state

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

We need to check if any of the pipes is using TRANSCODER_EDP.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 73ce007..827c5ba 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8551,6 +8551,31 @@ 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(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]);
 
-- 
1.7.11.4