drm/i915/sdvo: Always fallback to querying the shared DDC line

On a few devices, like the Mac Mini, the CRT DDC pins are shared between
the analog connector and the digital connector. In this scenario, rely
on the EDID to determine if a digital panel is connected to the digital
connector.

Reported-and-tested-by: Tino Keitel <tino.keitel@tikei.de>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 6 insertions, 45 deletions

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 843182528b79..bf643100dec8 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1296,55 +1296,14 @@ intel_sdvo_get_edid(struct drm_connector *connector)
         return drm_get_edid(connector, &sdvo->ddc);
 }
 
-static struct drm_connector *
-intel_find_analog_connector(struct drm_device *dev)
-{
-        struct drm_connector *connector;
-        struct intel_sdvo *encoder;
-
-        list_for_each_entry(encoder,
-                            &dev->mode_config.encoder_list,
-                            base.base.head) {
-                if (encoder->base.type == INTEL_OUTPUT_ANALOG) {
-                        list_for_each_entry(connector,
-                                            &dev->mode_config.connector_list,
-                                            head) {
-                                if (&encoder->base ==
-                                    intel_attached_encoder(connector))
-                                        return connector;
-                        }
-                }
-        }
-
-        return NULL;
-}
-
-static int
-intel_analog_is_connected(struct drm_device *dev)
-{
-        struct drm_connector *analog_connector;
-
-        analog_connector = intel_find_analog_connector(dev);
-        if (!analog_connector)
-                return false;
-
-        if (analog_connector->funcs->detect(analog_connector, false) ==
-                        connector_status_disconnected)
-                return false;
-
-        return true;
-}
-
 /* Mac mini hack -- use the same DDC as the analog connector */
 static struct edid *
 intel_sdvo_get_analog_edid(struct drm_connector *connector)
 {
         struct drm_i915_private *dev_priv = connector->dev->dev_private;
 
-        if (!intel_analog_is_connected(connector->dev))
-                return NULL;
-
-        return drm_get_edid(connector, &dev_priv->gmbus[dev_priv->crt_ddc_pin].adapter);
+        return drm_get_edid(connector,
+                            &dev_priv->gmbus[dev_priv->crt_ddc_pin].adapter);
 }
 
 enum drm_connector_status
@@ -1475,8 +1434,10 @@ static void intel_sdvo_get_ddc_modes(struct drm_connector *connector)
                 edid = intel_sdvo_get_analog_edid(connector);
 
         if (edid != NULL) {
-                drm_mode_connector_update_edid_property(connector, edid);
-                drm_add_edid_modes(connector, edid);
+                if (edid->input & DRM_EDID_INPUT_DIGITAL) {
+                        drm_mode_connector_update_edid_property(connector, edid);
+                        drm_add_edid_modes(connector, edid);
+                }
                 connector->display_info.raw_edid = NULL;
                 kfree(edid);
         }