6 files changed, 99 insertions, 33 deletions

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 0fd2eb139f6e..4313bb0a49a6 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -411,7 +411,7 @@ static void omap_crtc_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
         struct drm_crtc *crtc = &omap_crtc->base;
         DRM_ERROR("%s: errors: %08x\n", omap_crtc->name, irqstatus);
         /* avoid getting in a flood, unregister the irq until next vblank */
-        omap_irq_unregister(crtc->dev, &omap_crtc->error_irq);
+        __omap_irq_unregister(crtc->dev, &omap_crtc->error_irq);
 }
 
 static void omap_crtc_apply_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
@@ -421,13 +421,13 @@ static void omap_crtc_apply_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
         struct drm_crtc *crtc = &omap_crtc->base;
 
         if (!omap_crtc->error_irq.registered)
-                omap_irq_register(crtc->dev, &omap_crtc->error_irq);
+                __omap_irq_register(crtc->dev, &omap_crtc->error_irq);
 
         if (!dispc_mgr_go_busy(omap_crtc->channel)) {
                 struct omap_drm_private *priv =
                                 crtc->dev->dev_private;
                 DBG("%s: apply done", omap_crtc->name);
-                omap_irq_unregister(crtc->dev, &omap_crtc->apply_irq);
+                __omap_irq_unregister(crtc->dev, &omap_crtc->apply_irq);
                 queue_work(priv->wq, &omap_crtc->apply_work);
         }
 }
@@ -623,6 +623,11 @@ void omap_crtc_pre_init(void)
         dss_install_mgr_ops(&mgr_ops);
 }
 
+void omap_crtc_pre_uninit(void)
+{
+        dss_uninstall_mgr_ops();
+}
+
 /* initialize crtc */
 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
                 struct drm_plane *plane, enum omap_channel channel, int id)
diff --git a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
index 701c4c10e08b..f926b4caf449 100644
--- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
+++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
@@ -969,12 +969,21 @@ static const struct dev_pm_ops omap_dmm_pm_ops = {
 };
 #endif
 
+#if defined(CONFIG_OF)
+static const struct of_device_id dmm_of_match[] = {
+        { .compatible = "ti,omap4-dmm", },
+        { .compatible = "ti,omap5-dmm", },
+        {},
+};
+#endif
+
 struct platform_driver omap_dmm_driver = {
         .probe = omap_dmm_probe,
         .remove = omap_dmm_remove,
         .driver = {
                 .owner = THIS_MODULE,
                 .name = DMM_DRIVER_NAME,
+                .of_match_table = of_match_ptr(dmm_of_match),
 #ifdef CONFIG_PM
                 .pm = &omap_dmm_pm_ops,
 #endif
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 13f294aeaefd..bf39fcc49e0f 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -86,6 +86,47 @@ static bool channel_used(struct drm_device *dev, enum omap_channel channel)
 
         return false;
 }
+static void omap_disconnect_dssdevs(void)
+{
+        struct omap_dss_device *dssdev = NULL;
+
+        for_each_dss_dev(dssdev)
+                dssdev->driver->disconnect(dssdev);
+}
+
+static int omap_connect_dssdevs(void)
+{
+        int r;
+        struct omap_dss_device *dssdev = NULL;
+        bool no_displays = true;
+
+        for_each_dss_dev(dssdev) {
+                r = dssdev->driver->connect(dssdev);
+                if (r == -EPROBE_DEFER) {
+                        omap_dss_put_device(dssdev);
+                        goto cleanup;
+                } else if (r) {
+                        dev_warn(dssdev->dev, "could not connect display: %s\n",
+                                dssdev->name);
+                } else {
+                        no_displays = false;
+                }
+        }
+
+        if (no_displays)
+                return -EPROBE_DEFER;
+
+        return 0;
+
+cleanup:
+        /*
+         * if we are deferring probe, we disconnect the devices we previously
+         * connected
+         */
+        omap_disconnect_dssdevs();
+
+        return r;
+}
 
 static int omap_modeset_init(struct drm_device *dev)
 {
@@ -95,9 +136,6 @@ static int omap_modeset_init(struct drm_device *dev)
         int num_mgrs = dss_feat_get_num_mgrs();
         int num_crtcs;
         int i, id = 0;
-        int r;
-
-        omap_crtc_pre_init();
 
         drm_mode_config_init(dev);
 
@@ -119,26 +157,8 @@ static int omap_modeset_init(struct drm_device *dev)
                 enum omap_channel channel;
                 struct omap_overlay_manager *mgr;
 
-                if (!dssdev->driver) {
-                        dev_warn(dev->dev, "%s has no driver.. skipping it\n",
-                                        dssdev->name);
+                if (!omapdss_device_is_connected(dssdev))
                         continue;
-                }
-
-                if (!(dssdev->driver->get_timings ||
-                                        dssdev->driver->read_edid)) {
-                        dev_warn(dev->dev, "%s driver does not support "
-                                "get_timings or read_edid.. skipping it!\n",
-                                dssdev->name);
-                        continue;
-                }
-
-                r = dssdev->driver->connect(dssdev);
-                if (r) {
-                        dev_err(dev->dev, "could not connect display: %s\n",
-                                        dssdev->name);
-                        continue;
-                }
 
                 encoder = omap_encoder_init(dev, dssdev);
 
@@ -497,16 +517,16 @@ static int dev_unload(struct drm_device *dev)
         DBG("unload: dev=%p", dev);
 
         drm_kms_helper_poll_fini(dev);
-        drm_vblank_cleanup(dev);
-        omap_drm_irq_uninstall(dev);
 
         omap_fbdev_free(dev);
         omap_modeset_free(dev);
         omap_gem_deinit(dev);
 
-        flush_workqueue(priv->wq);
         destroy_workqueue(priv->wq);
 
+        drm_vblank_cleanup(dev);
+        omap_drm_irq_uninstall(dev);
+
         kfree(dev->dev_private);
         dev->dev_private = NULL;
 
@@ -655,9 +675,19 @@ static void pdev_shutdown(struct platform_device *device)
 
 static int pdev_probe(struct platform_device *device)
 {
+        int r;
+
         if (omapdss_is_initialized() == false)
                 return -EPROBE_DEFER;
 
+        omap_crtc_pre_init();
+
+        r = omap_connect_dssdevs();
+        if (r) {
+                omap_crtc_pre_uninit();
+                return r;
+        }
+
         DBG("%s", device->name);
         return drm_platform_init(&omap_drm_driver, device);
 }
@@ -666,8 +696,10 @@ static int pdev_remove(struct platform_device *device)
 {
         DBG("");
 
-        drm_put_dev(platform_get_drvdata(device));
+        omap_disconnect_dssdevs();
+        omap_crtc_pre_uninit();
 
+        drm_put_dev(platform_get_drvdata(device));
         return 0;
 }
 
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h
index c88fea32dbf6..428b2981fd68 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.h
+++ b/drivers/gpu/drm/omapdrm/omap_drv.h
@@ -145,6 +145,8 @@ irqreturn_t omap_irq_handler(int irq, void *arg);
 void omap_irq_preinstall(struct drm_device *dev);
 int omap_irq_postinstall(struct drm_device *dev);
 void omap_irq_uninstall(struct drm_device *dev);
+void __omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq);
+void __omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq);
 void omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq);
 void omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq);
 int omap_drm_irq_uninstall(struct drm_device *dev);
@@ -158,6 +160,7 @@ enum omap_channel omap_crtc_channel(struct drm_crtc *crtc);
 int omap_crtc_apply(struct drm_crtc *crtc,
                 struct omap_drm_apply *apply);
 void omap_crtc_pre_init(void);
+void omap_crtc_pre_uninit(void);
 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
                 struct drm_plane *plane, enum omap_channel channel, int id);
 
diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c
index 6a12e899235b..5290a88c681d 100644
--- a/drivers/gpu/drm/omapdrm/omap_encoder.c
+++ b/drivers/gpu/drm/omapdrm/omap_encoder.c
@@ -51,6 +51,9 @@ struct omap_dss_device *omap_encoder_get_dssdev(struct drm_encoder *encoder)
 static void omap_encoder_destroy(struct drm_encoder *encoder)
 {
         struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
+
+        omap_encoder_set_enabled(encoder, false);
+
         drm_encoder_cleanup(encoder);
         kfree(omap_encoder);
 }
diff --git a/drivers/gpu/drm/omapdrm/omap_irq.c b/drivers/gpu/drm/omapdrm/omap_irq.c
index 0e5336e5a791..f035d2bceae7 100644
--- a/drivers/gpu/drm/omapdrm/omap_irq.c
+++ b/drivers/gpu/drm/omapdrm/omap_irq.c
@@ -45,12 +45,11 @@ static void omap_irq_update(struct drm_device *dev)
         dispc_read_irqenable();        /* flush posted write */
 }
 
-void omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq)
+void __omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq)
 {
         struct omap_drm_private *priv = dev->dev_private;
         unsigned long flags;
 
-        dispc_runtime_get();
         spin_lock_irqsave(&list_lock, flags);
 
         if (!WARN_ON(irq->registered)) {
@@ -60,14 +59,21 @@ void omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq)
         }
 
         spin_unlock_irqrestore(&list_lock, flags);
+}
+
+void omap_irq_register(struct drm_device *dev, struct omap_drm_irq *irq)
+{
+        dispc_runtime_get();
+
+        __omap_irq_register(dev, irq);
+
         dispc_runtime_put();
 }
 
-void omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq)
+void __omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq)
 {
         unsigned long flags;
 
-        dispc_runtime_get();
         spin_lock_irqsave(&list_lock, flags);
 
         if (!WARN_ON(!irq->registered)) {
@@ -77,6 +83,14 @@ void omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq)
         }
 
         spin_unlock_irqrestore(&list_lock, flags);
+}
+
+void omap_irq_unregister(struct drm_device *dev, struct omap_drm_irq *irq)
+{
+        dispc_runtime_get();
+
+        __omap_irq_unregister(dev, irq);
+
         dispc_runtime_put();
 }