drm/fbdev: rework output polling to be back in the core. (v4)

After thinking it over a lot it made more sense for the core to deal with
the output polling especially so it can notify X.

v2: drop plans for fake connector - per Michel's comments - fix X patch sent to xorg-devel, add intel polled/hpd setting, add initial nouveau polled/hpd settings.

v3: add config lock take inside polling, add intel/nouveau poll init/fini calls

v4: config lock was a bit agressive, only needed around connector list reading.
otherwise it could re-enter.

glisse: discard drm_helper_hpd_irq_event

v3: Reviewed-by: Michel Dänzer <michel@daenzer.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

6 files changed, 23 insertions, 13 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 14afe1e47e57..7e663a79829f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -843,6 +843,7 @@ nouveau_connector_create(struct drm_device *dev,
 
         switch (dcb->type) {
         case DCB_CONNECTOR_VGA:
+                connector->polled = DRM_CONNECTOR_POLL_CONNECT;
                 if (dev_priv->card_type >= NV_50) {
                         drm_connector_attach_property(connector,
                                         dev->mode_config.scaling_mode_property,
@@ -854,6 +855,17 @@ nouveau_connector_create(struct drm_device *dev,
         case DCB_CONNECTOR_TV_3:
                 nv_connector->scaling_mode = DRM_MODE_SCALE_NONE;
                 break;
+        case DCB_CONNECTOR_DP:
+        case DCB_CONNECTOR_eDP:
+        case DCB_CONNECTOR_HDMI_0:
+        case DCB_CONNECTOR_HDMI_1:
+        case DCB_CONNECTOR_DVI_I:
+        case DCB_CONNECTOR_DVI_D:
+                if (dev_priv->card_type >= NV_50)
+                        connector->polled = DRM_CONNECTOR_POLL_HPD;
+                else
+                        connector->polled = DRM_CONNECTOR_POLL_CONNECT;
+                /* fall-through */
         default:
                 nv_connector->scaling_mode = DRM_MODE_SCALE_FULLSCREEN;
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index 9d7928f40fdf..74e6b4ed12c0 100644
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -101,5 +101,6 @@ nouveau_user_framebuffer_create(struct drm_device *dev,
 
 const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
         .fb_create = nouveau_user_framebuffer_create,
+        .output_poll_changed = nouveau_fbcon_output_poll_changed,
 };
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
index 2c2199329cc1..fd4a2df715e9 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -326,15 +326,11 @@ nouveau_fbcon_find_or_create_single(struct drm_fb_helper *helper,
         return new_fb;
 }
 
-void nouveau_fbcon_hotplug(struct drm_device *dev)
+void
+nouveau_fbcon_output_poll_changed(struct drm_device *dev)
 {
         struct drm_nouveau_private *dev_priv = dev->dev_private;
-        drm_helper_fb_hpd_irq_event(&dev_priv->nfbdev->helper);
-}
-
-static void nouveau_fbcon_output_status_changed(struct drm_fb_helper *fb_helper)
-{
-        drm_helper_fb_hotplug_event(fb_helper, true);
+        drm_fb_helper_hotplug_event(&dev_priv->nfbdev->helper);
 }
 
 int
@@ -374,7 +370,6 @@ static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
         .gamma_set = nouveau_fbcon_gamma_set,
         .gamma_get = nouveau_fbcon_gamma_get,
         .fb_probe = nouveau_fbcon_find_or_create_single,
-        .fb_output_status_changed = nouveau_fbcon_output_status_changed,
 };
 
 
@@ -391,8 +386,7 @@ int nouveau_fbcon_init(struct drm_device *dev)
         dev_priv->nfbdev = nfbdev;
         nfbdev->helper.funcs = &nouveau_fbcon_helper_funcs;
 
-        drm_fb_helper_init(dev, &nfbdev->helper,
-                           2, 4, true);
+        drm_fb_helper_init(dev, &nfbdev->helper, 2, 4);
         drm_fb_helper_single_add_all_connectors(&nfbdev->helper);
         drm_fb_helper_initial_config(&nfbdev->helper, 32);
         return 0;
diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.h b/drivers/gpu/drm/nouveau/nouveau_fbcon.h
index bf8e00d4de65..e7e12684c37e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.h
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.h
@@ -58,6 +58,6 @@ void nouveau_fbcon_zfill_all(struct drm_device *dev);
 void nouveau_fbcon_save_disable_accel(struct drm_device *dev);
 void nouveau_fbcon_restore_accel(struct drm_device *dev);
 
-void nouveau_fbcon_hotplug(struct drm_device *dev);
+void nouveau_fbcon_output_poll_changed(struct drm_device *dev);
 #endif /* __NV50_FBCON_H__ */
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index c667a1138c33..e632339c323e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -516,8 +516,10 @@ nouveau_card_init(struct drm_device *dev)
 
         dev_priv->init_state = NOUVEAU_CARD_INIT_DONE;
 
-        if (drm_core_check_feature(dev, DRIVER_MODESET))
+        if (drm_core_check_feature(dev, DRIVER_MODESET)) {
                 nouveau_fbcon_init(dev);
+                drm_kms_helper_poll_init(dev);
+        }
 
         return 0;
 
@@ -844,6 +846,7 @@ int nouveau_unload(struct drm_device *dev)
         struct drm_nouveau_private *dev_priv = dev->dev_private;
 
         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+                drm_kms_helper_poll_fini(dev);
                 nouveau_fbcon_fini(dev);
                 if (dev_priv->card_type >= NV_50)
                         nv50_display_destroy(dev);
diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
index f9b304866e66..34156b69594f 100644
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -947,7 +947,7 @@ nv50_display_irq_hotplug_bh(struct work_struct *work)
         if (dev_priv->chipset >= 0x90)
                 nv_wr32(dev, 0xe074, nv_rd32(dev, 0xe074));
 
-        nouveau_fbcon_hotplug(dev);
+        drm_helper_hpd_irq_event(dev);
 }
 
 void