[Xenial][SRU][PATCH 1/2] drm/i915: Only ignore eDP ports that are connected

Phidias Chiang phidias.chiang at canonical.com
Thu Jul 7 08:24:28 UTC 2016


From: Chris Wilson <chris at chris-wilson.co.uk>

BugLink: http://bugs.launchpad.net/bugs/1599379

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 at chris-wilson.co.uk>
Tested-by: Phidias Chiang <phidias.chiang at canonical.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Jani Nikula <jani.nikula at intel.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464766070-31623-1-git-send-email-chris@chris-wilson.co.uk
(cherry picked from commit 457c52d87e5dac9a4cf1a6a287e60ea7645067d4)
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
(backported from commit fff7660d1e4f47dc6372ce2bd31a7b8cba0da340)
Signed-off-by: Phidias Chiang <phidias.chiang at canonical.com>
---
 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(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 1c16663..09884d2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14146,6 +14146,8 @@ static void intel_setup_outputs(struct drm_device *dev)
 		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
@@ -14155,19 +14157,17 @@ static void intel_setup_outputs(struct drm_device *dev)
 		 * 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 */
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 60d43ad..7de37bc 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6135,8 +6135,9 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
 	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;
@@ -6146,7 +6147,7 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
 
 	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)
@@ -6201,15 +6202,14 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
 	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)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 67aef65..70d9641 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1198,7 +1198,7 @@ void intel_csr_ucode_fini(struct drm_device *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,
-- 
2.7.3





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