X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=drivers%2Fgpu%2Fdrm%2Fi915%2Fintel_dp.c;h=8935c5113ea71f7841a2ba0fb29ec8b1c4a50f35;hb=43072a454646d22f81808bdc8fb1b269ee1717a6;hp=83d2f76cf3e2eb44ea49c93f146033c0c4db0346;hpb=773538e86081d146e0020435d614f4b96996c1f9;p=deliverable%2Flinux.git

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 83d2f76cf3e2..8935c5113ea7 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -375,9 +375,31 @@ vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
 	return intel_dp->pps_pipe;
 }
 
+typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
+			       enum pipe pipe);
+
+static bool vlv_pipe_has_pp_on(struct drm_i915_private *dev_priv,
+			       enum pipe pipe)
+{
+	return I915_READ(VLV_PIPE_PP_STATUS(pipe)) & PP_ON;
+}
+
+static bool vlv_pipe_has_vdd_on(struct drm_i915_private *dev_priv,
+				enum pipe pipe)
+{
+	return I915_READ(VLV_PIPE_PP_CONTROL(pipe)) & EDP_FORCE_VDD;
+}
+
+static bool vlv_pipe_any(struct drm_i915_private *dev_priv,
+			 enum pipe pipe)
+{
+	return true;
+}
+
 static enum pipe
-vlv_initial_power_sequencer_pipe(struct drm_i915_private *dev_priv,
-				 enum port port)
+vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
+		     enum port port,
+		     vlv_pipe_check pipe_check)
 {
 	enum pipe pipe;
 
@@ -388,6 +410,9 @@ vlv_initial_power_sequencer_pipe(struct drm_i915_private *dev_priv,
 		if (port_sel != PANEL_PORT_SELECT_VLV(port))
 			continue;
 
+		if (!pipe_check(dev_priv, pipe))
+			continue;
+
 		return pipe;
 	}
 
@@ -406,7 +431,17 @@ vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
 	lockdep_assert_held(&dev_priv->pps_mutex);
 
 	/* try to find a pipe with this port selected */
-	intel_dp->pps_pipe = vlv_initial_power_sequencer_pipe(dev_priv, port);
+	/* first pick one where the panel is on */
+	intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
+						  vlv_pipe_has_pp_on);
+	/* didn't find one? pick one where vdd is on */
+	if (intel_dp->pps_pipe == INVALID_PIPE)
+		intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
+							  vlv_pipe_has_vdd_on);
+	/* didn't find one? pick one with just the correct port */
+	if (intel_dp->pps_pipe == INVALID_PIPE)
+		intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
+							  vlv_pipe_any);
 
 	/* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
 	if (intel_dp->pps_pipe == INVALID_PIPE) {
@@ -2339,10 +2374,10 @@ static void intel_enable_dp(struct intel_encoder *encoder)
 		return;
 
 	intel_edp_panel_vdd_on(intel_dp);
-	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
-	intel_dp_start_link_train(intel_dp);
 	intel_edp_panel_on(intel_dp);
 	intel_edp_panel_vdd_off(intel_dp, true);
+	intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
+	intel_dp_start_link_train(intel_dp);
 	intel_dp_complete_link_train(intel_dp);
 	intel_dp_stop_link_train(intel_dp);
 }