--- zzzz-none-000/linux-3.10.107/drivers/gpu/drm/exynos/exynos_drm_core.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/gpu/drm/exynos/exynos_drm_core.c	2021-02-04 17:41:59.000000000 +0000
@@ -14,191 +14,76 @@
 
 #include <drm/drmP.h>
 #include "exynos_drm_drv.h"
-#include "exynos_drm_encoder.h"
-#include "exynos_drm_connector.h"
+#include "exynos_drm_crtc.h"
 #include "exynos_drm_fbdev.h"
 
 static LIST_HEAD(exynos_drm_subdrv_list);
 
-static int exynos_drm_create_enc_conn(struct drm_device *dev,
-					struct exynos_drm_subdrv *subdrv)
+int exynos_drm_subdrv_register(struct exynos_drm_subdrv *subdrv)
 {
-	struct drm_encoder *encoder;
-	struct drm_connector *connector;
-	int ret;
-
-	DRM_DEBUG_DRIVER("%s\n", __FILE__);
-
-	subdrv->manager->dev = subdrv->dev;
-
-	/* create and initialize a encoder for this sub driver. */
-	encoder = exynos_drm_encoder_create(dev, subdrv->manager,
-			(1 << MAX_CRTC) - 1);
-	if (!encoder) {
-		DRM_ERROR("failed to create encoder\n");
-		return -EFAULT;
-	}
-
-	/*
-	 * create and initialize a connector for this sub driver and
-	 * attach the encoder created above to the connector.
-	 */
-	connector = exynos_drm_connector_create(dev, encoder);
-	if (!connector) {
-		DRM_ERROR("failed to create connector\n");
-		ret = -EFAULT;
-		goto err_destroy_encoder;
-	}
+	if (!subdrv)
+		return -EINVAL;
 
-	subdrv->encoder = encoder;
-	subdrv->connector = connector;
+	list_add_tail(&subdrv->list, &exynos_drm_subdrv_list);
 
 	return 0;
-
-err_destroy_encoder:
-	encoder->funcs->destroy(encoder);
-	return ret;
 }
 
-static void exynos_drm_destroy_enc_conn(struct exynos_drm_subdrv *subdrv)
-{
-	if (subdrv->encoder) {
-		struct drm_encoder *encoder = subdrv->encoder;
-		encoder->funcs->destroy(encoder);
-		subdrv->encoder = NULL;
-	}
-
-	if (subdrv->connector) {
-		struct drm_connector *connector = subdrv->connector;
-		connector->funcs->destroy(connector);
-		subdrv->connector = NULL;
-	}
-}
-
-static int exynos_drm_subdrv_probe(struct drm_device *dev,
-					struct exynos_drm_subdrv *subdrv)
+int exynos_drm_subdrv_unregister(struct exynos_drm_subdrv *subdrv)
 {
-	if (subdrv->probe) {
-		int ret;
-
-		subdrv->drm_dev = dev;
+	if (!subdrv)
+		return -EINVAL;
 
-		/*
-		 * this probe callback would be called by sub driver
-		 * after setting of all resources to this sub driver,
-		 * such as clock, irq and register map are done or by load()
-		 * of exynos drm driver.
-		 *
-		 * P.S. note that this driver is considered for modularization.
-		 */
-		ret = subdrv->probe(dev, subdrv->dev);
-		if (ret)
-			return ret;
-	}
+	list_del(&subdrv->list);
 
 	return 0;
 }
 
-static void exynos_drm_subdrv_remove(struct drm_device *dev,
-				      struct exynos_drm_subdrv *subdrv)
-{
-	DRM_DEBUG_DRIVER("%s\n", __FILE__);
-
-	if (subdrv->remove)
-		subdrv->remove(dev, subdrv->dev);
-}
-
-int exynos_drm_device_register(struct drm_device *dev)
+int exynos_drm_device_subdrv_probe(struct drm_device *dev)
 {
 	struct exynos_drm_subdrv *subdrv, *n;
-	unsigned int fine_cnt = 0;
 	int err;
 
-	DRM_DEBUG_DRIVER("%s\n", __FILE__);
-
 	if (!dev)
 		return -EINVAL;
 
 	list_for_each_entry_safe(subdrv, n, &exynos_drm_subdrv_list, list) {
-		err = exynos_drm_subdrv_probe(dev, subdrv);
-		if (err) {
-			DRM_DEBUG("exynos drm subdrv probe failed.\n");
-			list_del(&subdrv->list);
-			continue;
-		}
+		if (subdrv->probe) {
+			subdrv->drm_dev = dev;
 
-		/*
-		 * if manager is null then it means that this sub driver
-		 * doesn't need encoder and connector.
-		 */
-		if (!subdrv->manager) {
-			fine_cnt++;
-			continue;
+			/*
+			 * this probe callback would be called by sub driver
+			 * after setting of all resources to this sub driver,
+			 * such as clock, irq and register map are done.
+			 */
+			err = subdrv->probe(dev, subdrv->dev);
+			if (err) {
+				DRM_DEBUG("exynos drm subdrv probe failed.\n");
+				list_del(&subdrv->list);
+				continue;
+			}
 		}
-
-		err = exynos_drm_create_enc_conn(dev, subdrv);
-		if (err) {
-			DRM_DEBUG("failed to create encoder and connector.\n");
-			exynos_drm_subdrv_remove(dev, subdrv);
-			list_del(&subdrv->list);
-			continue;
-		}
-
-		fine_cnt++;
 	}
 
-	if (!fine_cnt)
-		return -EINVAL;
-
 	return 0;
 }
-EXPORT_SYMBOL_GPL(exynos_drm_device_register);
 
-int exynos_drm_device_unregister(struct drm_device *dev)
+int exynos_drm_device_subdrv_remove(struct drm_device *dev)
 {
 	struct exynos_drm_subdrv *subdrv;
 
-	DRM_DEBUG_DRIVER("%s\n", __FILE__);
-
 	if (!dev) {
 		WARN(1, "Unexpected drm device unregister!\n");
 		return -EINVAL;
 	}
 
 	list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) {
-		exynos_drm_subdrv_remove(dev, subdrv);
-		exynos_drm_destroy_enc_conn(subdrv);
+		if (subdrv->remove)
+			subdrv->remove(dev, subdrv->dev);
 	}
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(exynos_drm_device_unregister);
-
-int exynos_drm_subdrv_register(struct exynos_drm_subdrv *subdrv)
-{
-	DRM_DEBUG_DRIVER("%s\n", __FILE__);
-
-	if (!subdrv)
-		return -EINVAL;
-
-	list_add_tail(&subdrv->list, &exynos_drm_subdrv_list);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(exynos_drm_subdrv_register);
-
-int exynos_drm_subdrv_unregister(struct exynos_drm_subdrv *subdrv)
-{
-	DRM_DEBUG_DRIVER("%s\n", __FILE__);
-
-	if (!subdrv)
-		return -EINVAL;
-
-	list_del(&subdrv->list);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(exynos_drm_subdrv_unregister);
 
 int exynos_drm_subdrv_open(struct drm_device *dev, struct drm_file *file)
 {
@@ -216,13 +101,12 @@
 	return 0;
 
 err:
-	list_for_each_entry_reverse(subdrv, &subdrv->list, list) {
+	list_for_each_entry_continue_reverse(subdrv, &exynos_drm_subdrv_list, list) {
 		if (subdrv->close)
 			subdrv->close(dev, subdrv->dev, file);
 	}
 	return ret;
 }
-EXPORT_SYMBOL_GPL(exynos_drm_subdrv_open);
 
 void exynos_drm_subdrv_close(struct drm_device *dev, struct drm_file *file)
 {
@@ -233,4 +117,3 @@
 			subdrv->close(dev, subdrv->dev, file);
 	}
 }
-EXPORT_SYMBOL_GPL(exynos_drm_subdrv_close);