Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...

[pandora-kernel.git] / drivers / gpu / drm / drm_crtc_helper.c

diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index b142ac2..7644019 100644 (file)
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -807,3 +807,98 @@ int drm_helper_resume_force_mode(struct drm_device *dev)
        return 0;
 }
 EXPORT_SYMBOL(drm_helper_resume_force_mode);
+
+static struct slow_work_ops output_poll_ops;
+
+#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
+static void output_poll_execute(struct slow_work *work)
+{
+       struct delayed_slow_work *delayed_work = container_of(work, struct delayed_slow_work, work);
+       struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_slow_work);
+       struct drm_connector *connector;
+       enum drm_connector_status old_status, status;
+       bool repoll = false, changed = false;
+       int ret;
+
+       mutex_lock(&dev->mode_config.mutex);
+       list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+
+               /* if this is HPD or polled don't check it -
+                  TV out for instance */
+               if (!connector->polled)
+                       continue;
+
+               else if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT))
+                       repoll = true;
+
+               old_status = connector->status;
+               /* if we are connected and don't want to poll for disconnect
+                  skip it */
+               if (old_status == connector_status_connected &&
+                   !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT) &&
+                   !(connector->polled & DRM_CONNECTOR_POLL_HPD))
+                       continue;
+
+               status = connector->funcs->detect(connector);
+               if (old_status != status)
+                       changed = true;
+       }
+
+       mutex_unlock(&dev->mode_config.mutex);
+
+       if (changed) {
+               /* send a uevent + call fbdev */
+               drm_sysfs_hotplug_event(dev);
+               if (dev->mode_config.funcs->output_poll_changed)
+                       dev->mode_config.funcs->output_poll_changed(dev);
+       }
+
+       if (repoll) {
+               ret = delayed_slow_work_enqueue(delayed_work, DRM_OUTPUT_POLL_PERIOD);
+               if (ret)
+                       DRM_ERROR("delayed enqueue failed %d\n", ret);
+       }
+}
+
+void drm_kms_helper_poll_init(struct drm_device *dev)
+{
+       struct drm_connector *connector;
+       bool poll = false;
+       int ret;
+
+       list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+               if (connector->polled)
+                       poll = true;
+       }
+       slow_work_register_user(THIS_MODULE);
+       delayed_slow_work_init(&dev->mode_config.output_poll_slow_work,
+                              &output_poll_ops);
+
+       if (poll) {
+               ret = delayed_slow_work_enqueue(&dev->mode_config.output_poll_slow_work, DRM_OUTPUT_POLL_PERIOD);
+               if (ret)
+                       DRM_ERROR("delayed enqueue failed %d\n", ret);
+       }
+}
+EXPORT_SYMBOL(drm_kms_helper_poll_init);
+
+void drm_kms_helper_poll_fini(struct drm_device *dev)
+{
+       delayed_slow_work_cancel(&dev->mode_config.output_poll_slow_work);
+       slow_work_unregister_user(THIS_MODULE);
+}
+EXPORT_SYMBOL(drm_kms_helper_poll_fini);
+
+void drm_helper_hpd_irq_event(struct drm_device *dev)
+{
+       if (!dev->mode_config.poll_enabled)
+               return;
+       delayed_slow_work_cancel(&dev->mode_config.output_poll_slow_work);
+       /* schedule a slow work asap */
+       delayed_slow_work_enqueue(&dev->mode_config.output_poll_slow_work, 0);
+}
+EXPORT_SYMBOL(drm_helper_hpd_irq_event);
+
+static struct slow_work_ops output_poll_ops = {
+       .execute = output_poll_execute,
+};