From 3d42cac94eb969eaacd7f52c4e3d2abd0061995f Mon Sep 17 00:00:00 2001
From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Thu, 7 Oct 2010 16:01:21 -0700
Subject: [PATCH] --- yaml --- r: 218299 b: refs/heads/master c:
 896673836b8c55b75e7d7d2741aaaadff0c6a038 h: refs/heads/master i:   218297:
 627a5fbfab048d959e0165f44cb5a5f39081dda7   218295:
 642e4becc2068f5d4a72ea9e15cc54bbd40a0fe7 v: v3

---
 [refs]                                |  2 +-
 trunk/drivers/gpu/drm/i915/i915_drv.h |  1 +
 trunk/drivers/gpu/drm/i915/intel_dp.c | 20 ++++++++++++++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 9d733ba33a2e..1df22e3214e4 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8088699f029b2a27af9bc5431ef7542c84195760
+refs/heads/master: 896673836b8c55b75e7d7d2741aaaadff0c6a038
diff --git a/trunk/drivers/gpu/drm/i915/i915_drv.h b/trunk/drivers/gpu/drm/i915/i915_drv.h
index 6d49a9f5c2b1..84e33aeececd 100644
--- a/trunk/drivers/gpu/drm/i915/i915_drv.h
+++ b/trunk/drivers/gpu/drm/i915/i915_drv.h
@@ -350,6 +350,7 @@ typedef struct drm_i915_private {
 		int bpp;
 		struct edp_power_seq pps;
 	} edp;
+	bool no_aux_handshake;
 
 	struct notifier_block lid_notifier;
 
diff --git a/trunk/drivers/gpu/drm/i915/intel_dp.c b/trunk/drivers/gpu/drm/i915/intel_dp.c
index 944dfe199f6e..7fa828275e4a 100644
--- a/trunk/drivers/gpu/drm/i915/intel_dp.c
+++ b/trunk/drivers/gpu/drm/i915/intel_dp.c
@@ -1724,6 +1724,26 @@ intel_dp_init(struct drm_device *dev, int output_reg)
 
 	intel_dp_i2c_init(intel_dp, intel_connector, name);
 
+	/* Cache some DPCD data in the eDP case */
+	if (is_edp(intel_dp)) {
+		int ret;
+		bool was_on;
+
+		was_on = ironlake_edp_panel_on(intel_dp);
+		ret = intel_dp_aux_native_read(intel_dp, DP_DPCD_REV,
+					       intel_dp->dpcd,
+					       sizeof(intel_dp->dpcd));
+		if (ret == sizeof(intel_dp->dpcd)) {
+			if (intel_dp->dpcd[0] >= 0x11)
+				dev_priv->no_aux_handshake = intel_dp->dpcd[3] &
+					DP_NO_AUX_HANDSHAKE_LINK_TRAINING;
+		} else {
+			DRM_ERROR("failed to retrieve link info\n");
+		}
+		if (!was_on)
+			ironlake_edp_panel_off(dev);
+	}
+
 	intel_encoder->hot_plug = intel_dp_hot_plug;
 
 	if (is_edp(intel_dp)) {