Patch "[PATCH 130/135] drm/i915: Only ignore eDP ports that are connected" has been added to the 4.4-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    [PATCH 130/135] drm/i915: Only ignore eDP ports that are connected

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     0130-drm-i915-Only-ignore-eDP-ports-that-are-connected.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 7b7f307e0d9a3b69955e1c6ef9c4ca297c35cf5f Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 7 Jul 2016 16:24:28 +0800
Subject: [PATCH 130/135] drm/i915: Only ignore eDP ports that are connected
MIME-Version: 1.0
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[ Upstream commit 457c52d87e5dac9a4cf1a6a287e60ea7645067d4 ]

If the VBT says that a certain port should be eDP (and hence fused off
from HDMI), but in reality it isn't, we need to try and acquire the HDMI
connection instead. So only trust the VBT edp setting if we can connect
to an eDP device on that port.

Fixes: d2182a6608 (drm/i915: Don't register HDMI connectors for eDP ports on VLV/CHV)
References: https://bugs.freedesktop.org/show_bug.cgi?id=96288
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Phidias Chiang <phidias.chiang@canonical.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464766070-31623-1-git-send-email-chris@chris-wilson.co.uk
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/i915/intel_display.c |   20 ++++++++++----------
 drivers/gpu/drm/i915/intel_dp.c      |   12 ++++++------
 drivers/gpu/drm/i915/intel_drv.h     |    2 +-
 3 files changed, 17 insertions(+), 17 deletions(-)

--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14160,6 +14160,8 @@ static void intel_setup_outputs(struct d
 		if (I915_READ(PCH_DP_D) & DP_DETECTED)
 			intel_dp_init(dev, PCH_DP_D, PORT_D);
 	} else if (IS_VALLEYVIEW(dev)) {
+		bool has_edp;
+
 		/*
 		 * The DP_DETECTED bit is the latched state of the DDC
 		 * SDA pin at boot. However since eDP doesn't require DDC
@@ -14169,19 +14171,17 @@ static void intel_setup_outputs(struct d
 		 * eDP ports. Consult the VBT as well as DP_DETECTED to
 		 * detect eDP ports.
 		 */
-		if (I915_READ(VLV_HDMIB) & SDVO_DETECTED &&
-		    !intel_dp_is_edp(dev, PORT_B))
+		has_edp = intel_dp_is_edp(dev, PORT_B);
+		if (I915_READ(VLV_DP_B) & DP_DETECTED || has_edp)
+			has_edp &= intel_dp_init(dev, VLV_DP_B, PORT_B);
+		if (I915_READ(VLV_HDMIB) & SDVO_DETECTED && !has_edp)
 			intel_hdmi_init(dev, VLV_HDMIB, PORT_B);
-		if (I915_READ(VLV_DP_B) & DP_DETECTED ||
-		    intel_dp_is_edp(dev, PORT_B))
-			intel_dp_init(dev, VLV_DP_B, PORT_B);
 
-		if (I915_READ(VLV_HDMIC) & SDVO_DETECTED &&
-		    !intel_dp_is_edp(dev, PORT_C))
+		has_edp = intel_dp_is_edp(dev, PORT_C);
+		if (I915_READ(VLV_DP_C) & DP_DETECTED || has_edp)
+			has_edp &= intel_dp_init(dev, VLV_DP_C, PORT_C);
+		if (I915_READ(VLV_HDMIC) & SDVO_DETECTED && !has_edp)
 			intel_hdmi_init(dev, VLV_HDMIC, PORT_C);
-		if (I915_READ(VLV_DP_C) & DP_DETECTED ||
-		    intel_dp_is_edp(dev, PORT_C))
-			intel_dp_init(dev, VLV_DP_C, PORT_C);
 
 		if (IS_CHERRYVIEW(dev)) {
 			/* eDP not supported on port D, so don't check VBT */
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6113,8 +6113,9 @@ intel_dp_init_connector(struct intel_dig
 	return true;
 }
 
-void
-intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
+bool intel_dp_init(struct drm_device *dev,
+		   int output_reg,
+		   enum port port)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_digital_port *intel_dig_port;
@@ -6124,7 +6125,7 @@ intel_dp_init(struct drm_device *dev, in
 
 	intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
 	if (!intel_dig_port)
-		return;
+		return false;
 
 	intel_connector = intel_connector_alloc();
 	if (!intel_connector)
@@ -6179,15 +6180,14 @@ intel_dp_init(struct drm_device *dev, in
 	if (!intel_dp_init_connector(intel_dig_port, intel_connector))
 		goto err_init_connector;
 
-	return;
+	return true;
 
 err_init_connector:
 	drm_encoder_cleanup(encoder);
 	kfree(intel_connector);
 err_connector_alloc:
 	kfree(intel_dig_port);
-
-	return;
+	return false;
 }
 
 void intel_dp_mst_suspend(struct drm_device *dev)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1195,7 +1195,7 @@ void intel_csr_ucode_fini(struct drm_dev
 void assert_csr_loaded(struct drm_i915_private *dev_priv);
 
 /* intel_dp.c */
-void intel_dp_init(struct drm_device *dev, int output_reg, enum port port);
+bool intel_dp_init(struct drm_device *dev, int output_reg, enum port port);
 bool intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 			     struct intel_connector *intel_connector);
 void intel_dp_set_link_params(struct intel_dp *intel_dp,


Patches currently in stable-queue which might be from chris@chris-wilson.co.uk are

queue-4.4/0131-drm-i915-Check-VBT-for-port-presence-in-addition-to-.patch
queue-4.4/0130-drm-i915-Only-ignore-eDP-ports-that-are-connected.patch
queue-4.4/0111-drm-Balance-error-path-for-GEM-handle-allocation.patch