linux-kernel - [PATCH v2 1/2] drm: add drm_connector_attach_edid

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Date:   Tue,  2 Oct 2018 08:19:04 +0200
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Gerd Hoffmann <kraxel@...hat.com>,
        Gustavo Padovan <gustavo@...ovan.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 1/2] drm: add drm_connector_attach_edid_property()

drm_connector_init doesn't attach the edid property for some connector
types, drm_connector_attach_edid_property() can be used to enable the
edid property in these cases.

Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
 include/drm/drm_connector.h     |  1 +
 drivers/gpu/drm/drm_connector.c | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 97ea41dc67..4d58966b54 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1083,6 +1083,7 @@ int drm_connector_init(struct drm_device *dev,
 		       struct drm_connector *connector,
 		       const struct drm_connector_funcs *funcs,
 		       int connector_type);
+void drm_connector_attach_edid_property(struct drm_connector *connector);
 int drm_connector_register(struct drm_connector *connector);
 void drm_connector_unregister(struct drm_connector *connector);
 int drm_connector_attach_encoder(struct drm_connector *connector,
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 6011d769d5..6c6ef4f9b9 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -291,6 +291,26 @@ int drm_connector_init(struct drm_device *dev,
 EXPORT_SYMBOL(drm_connector_init);
 
 /**
+ * drm_connector_attach_edid_property - attach edid property.
+ * @dev: DRM device
+ * @connector: the connector
+ *
+ * Some connector types like DRM_MODE_CONNECTOR_VIRTUAL do not get a
+ * edid property attached by default.  This function can be used to
+ * explicitly enable the edid property in these cases.
+ *
+ */
+void drm_connector_attach_edid_property(struct drm_connector *connector)
+{
+	struct drm_mode_config *config = &connector->dev->mode_config;
+
+	drm_object_attach_property(&connector->base,
+				   config->edid_property,
+				   0);
+}
+EXPORT_SYMBOL(drm_connector_attach_edid_property);
+
+/**
  * drm_connector_attach_encoder - attach a connector to an encoder
  * @connector: connector to attach
  * @encoder: encoder to attach @connector to
-- 
2.9.3