drm/i915: Only ignore eDP ports that are connected

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
(cherry picked from commit 457c52d87e5dac9a4cf1a6a287e60ea7645067d4)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 2113f401f0bacf303e2dbcc222d922c3006ed046..996e0c37293cdab79bfad300ddfd368bb6858c17 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14554,6 +14554,8 @@ 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) || IS_CHERRYVIEW(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
@@ -14563,19 +14565,17 @@ 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 f192f58708c25dbedf74994b4a377098093f0dc3..2991326842f56ade73ae710b225bae012d63b88d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5923,9 +5923,9 @@ fail:
        return false;
 }
 
-void
-intel_dp_init(struct drm_device *dev,
-             i915_reg_t output_reg, enum port port)
+bool intel_dp_init(struct drm_device *dev,
+                  i915_reg_t output_reg,
+                  enum port port)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_digital_port *intel_dig_port;
@@ -5935,7 +5935,7 @@ intel_dp_init(struct drm_device *dev,
 
        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)
@@ -5992,7 +5992,7 @@ intel_dp_init(struct drm_device *dev,
        if (!intel_dp_init_connector(intel_dig_port, intel_connector))
                goto err_init_connector;
 
-       return;
+       return true;
 
 err_init_connector:
        drm_encoder_cleanup(encoder);
@@ -6000,8 +6000,7 @@ err_encoder_init:
        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 a28b4aac1e02354c0193109e27ffada19cbbbfbc..4a24b0067a3aebecd5715bb5dc9cbbf5a2ab89b2 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1284,7 +1284,7 @@ void intel_csr_ucode_suspend(struct drm_i915_private *);
 void intel_csr_ucode_resume(struct drm_i915_private *);
 
 /* intel_dp.c */
-void intel_dp_init(struct drm_device *dev, i915_reg_t output_reg, enum port port);
+bool intel_dp_init(struct drm_device *dev, i915_reg_t 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,