drm/kms: Add a module parameter to disable polling

[net-next-2.6.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 b9e4dbfa053308472b038d6e7c0e8b21bc12d072..06fc0bccaff71e399979b61ae35ee474631c9c69 100644 (file)
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -34,6 +34,9 @@
 #include "drm_crtc_helper.h"
 #include "drm_fb_helper.h"
 
+static bool drm_kms_helper_poll = true;
+module_param_named(poll, drm_kms_helper_poll, bool, 0600);
+
 static void drm_mode_validate_flag(struct drm_connector *connector,
                                   int flags)
 {
@@ -99,8 +102,10 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
                        connector->status = connector_status_disconnected;
                if (connector->funcs->force)
                        connector->funcs->force(connector);
-       } else
+       } else {
                connector->status = connector->funcs->detect(connector);
+               drm_helper_hpd_irq_event(dev);
+       }
 
        if (connector->status == connector_status_disconnected) {
                DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
@@ -817,12 +822,12 @@ int drm_helper_resume_force_mode(struct drm_device *dev)
                                if (encoder_funcs->dpms)
                                        (*encoder_funcs->dpms) (encoder,
                                                                drm_helper_choose_encoder_dpms(encoder));
-
-                               crtc_funcs = crtc->helper_private;
-                               if (crtc_funcs->dpms)
-                                       (*crtc_funcs->dpms) (crtc,
-                                                            drm_helper_choose_crtc_dpms(crtc));
                        }
+
+                       crtc_funcs = crtc->helper_private;
+                       if (crtc_funcs->dpms)
+                               (*crtc_funcs->dpms) (crtc,
+                                                    drm_helper_choose_crtc_dpms(crtc));
                }
        }
        /* disable the unused connectors while restoring the modesetting */
@@ -840,6 +845,9 @@ static void output_poll_execute(struct work_struct *work)
        enum drm_connector_status old_status, status;
        bool repoll = false, changed = false;
 
+       if (!drm_kms_helper_poll)
+               return;
+
        mutex_lock(&dev->mode_config.mutex);
        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 
@@ -890,6 +898,9 @@ void drm_kms_helper_poll_enable(struct drm_device *dev)
        bool poll = false;
        struct drm_connector *connector;
 
+       if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
+               return;
+
        list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
                if (connector->polled)
                        poll = true;
@@ -919,8 +930,10 @@ void drm_helper_hpd_irq_event(struct drm_device *dev)
 {
        if (!dev->mode_config.poll_enabled)
                return;
+
        /* kill timer and schedule immediate execution, this doesn't block */
        cancel_delayed_work(&dev->mode_config.output_poll_work);
-       queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
+       if (drm_kms_helper_poll)
+               queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0);
 }
 EXPORT_SYMBOL(drm_helper_hpd_irq_event);