1 files changed, 53 insertions, 8 deletions

diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index 5c99d3773212..ffc305fc2076 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -166,23 +166,68 @@ void drm_sysfs_destroy(void)
 /*
  * Connector properties
  */
-static ssize_t status_show(struct device *device,
+static ssize_t status_store(struct device *device,
                            struct device_attribute *attr,
-                           char *buf)
+                           const char *buf, size_t count)
 {
         struct drm_connector *connector = to_drm_connector(device);
-        enum drm_connector_status status;
+        struct drm_device *dev = connector->dev;
+        enum drm_connector_status old_status;
         int ret;
 
-        ret = mutex_lock_interruptible(&connector->dev->mode_config.mutex);
+        ret = mutex_lock_interruptible(&dev->mode_config.mutex);
         if (ret)
                 return ret;
 
-        status = connector->funcs->detect(connector, true);
-        mutex_unlock(&connector->dev->mode_config.mutex);
+        old_status = connector->status;
+
+        if (sysfs_streq(buf, "detect")) {
+                connector->force = 0;
+                connector->status = connector->funcs->detect(connector, true);
+        } else if (sysfs_streq(buf, "on")) {
+                connector->force = DRM_FORCE_ON;
+        } else if (sysfs_streq(buf, "on-digital")) {
+                connector->force = DRM_FORCE_ON_DIGITAL;
+        } else if (sysfs_streq(buf, "off")) {
+                connector->force = DRM_FORCE_OFF;
+        } else
+                ret = -EINVAL;
+
+        if (ret == 0 && connector->force) {
+                if (connector->force == DRM_FORCE_ON ||
+                    connector->force == DRM_FORCE_ON_DIGITAL)
+                        connector->status = connector_status_connected;
+                else
+                        connector->status = connector_status_disconnected;
+                if (connector->funcs->force)
+                        connector->funcs->force(connector);
+        }
+
+        if (old_status != connector->status) {
+                DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
+                              connector->base.id,
+                              connector->name,
+                              old_status, connector->status);
+
+                dev->mode_config.delayed_event = true;
+                if (dev->mode_config.poll_enabled)
+                        schedule_delayed_work(&dev->mode_config.output_poll_work,
+                                              0);
+        }
+
+        mutex_unlock(&dev->mode_config.mutex);
+
+        return ret;
+}
+
+static ssize_t status_show(struct device *device,
+                           struct device_attribute *attr,
+                           char *buf)
+{
+        struct drm_connector *connector = to_drm_connector(device);
 
         return snprintf(buf, PAGE_SIZE, "%s\n",
-                        drm_get_connector_status_name(status));
+                        drm_get_connector_status_name(connector->status));
 }
 
 static ssize_t dpms_show(struct device *device,
@@ -339,7 +384,7 @@ static ssize_t select_subconnector_show(struct device *device,
                         drm_get_dvi_i_select_name((int)subconnector));
 }
 
-static DEVICE_ATTR_RO(status);
+static DEVICE_ATTR_RW(status);
 static DEVICE_ATTR_RO(enabled);
 static DEVICE_ATTR_RO(dpms);
 static DEVICE_ATTR_RO(modes);