--- zzzz-none-000/linux-3.10.107/drivers/gpu/drm/mgag200/mgag200_main.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/gpu/drm/mgag200/mgag200_main.c	2021-02-04 17:41:59.000000000 +0000
@@ -82,12 +82,19 @@
 	int orig;
 	int test1, test2;
 	int orig1, orig2;
+	unsigned int vram_size;
 
 	/* Probe */
 	orig = ioread16(mem);
 	iowrite16(0, mem);
 
-	for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) {
+	vram_size = mdev->mc.vram_window;
+
+	if ((mdev->type == G200_EW3) && (vram_size >= 0x1000000)) {
+		vram_size = vram_size - 0x400000;
+	}
+
+	for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
 		orig1 = ioread8(mem + offset);
 		orig2 = ioread8(mem + offset + 0x100);
 
@@ -209,23 +216,49 @@
 	r = mgag200_device_init(dev, flags);
 	if (r) {
 		dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
-		goto out;
+		return r;
 	}
 	r = mgag200_mm_init(mdev);
 	if (r)
-		goto out;
+		goto err_mm;
 
 	drm_mode_config_init(dev);
 	dev->mode_config.funcs = (void *)&mga_mode_funcs;
-	dev->mode_config.preferred_depth = 24;
+	if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
+		dev->mode_config.preferred_depth = 16;
+	else
+		dev->mode_config.preferred_depth = 24;
 	dev->mode_config.prefer_shadow = 1;
 
 	r = mgag200_modeset_init(mdev);
-	if (r)
+	if (r) {
 		dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
-out:
-	if (r)
-		mgag200_driver_unload(dev);
+		goto err_modeset;
+	}
+
+	/* Make small buffers to store a hardware cursor (double buffered icon updates) */
+	mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
+					  &mdev->cursor.pixels_1);
+	mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
+					  &mdev->cursor.pixels_2);
+	if (!mdev->cursor.pixels_2 || !mdev->cursor.pixels_1) {
+		mdev->cursor.pixels_1 = NULL;
+		mdev->cursor.pixels_2 = NULL;
+		dev_warn(&dev->pdev->dev,
+			"Could not allocate space for cursors. Not doing hardware cursors.\n");
+	} else {
+		mdev->cursor.pixels_current = mdev->cursor.pixels_1;
+		mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
+	}
+
+	return 0;
+
+err_modeset:
+	drm_mode_config_cleanup(dev);
+	mgag200_mm_fini(mdev);
+err_mm:
+	dev->dev_private = NULL;
+
 	return r;
 }
 
@@ -291,20 +324,7 @@
 	return 0;
 }
 
-int mgag200_dumb_destroy(struct drm_file *file,
-		     struct drm_device *dev,
-		     uint32_t handle)
-{
-	return drm_gem_handle_delete(file, handle);
-}
-
-int mgag200_gem_init_object(struct drm_gem_object *obj)
-{
-	BUG();
-	return 0;
-}
-
-void mgag200_bo_unref(struct mgag200_bo **bo)
+static void mgag200_bo_unref(struct mgag200_bo **bo)
 {
 	struct ttm_buffer_object *tbo;
 
@@ -313,24 +333,20 @@
 
 	tbo = &((*bo)->bo);
 	ttm_bo_unref(&tbo);
-	if (tbo == NULL)
-		*bo = NULL;
-
+	*bo = NULL;
 }
 
 void mgag200_gem_free_object(struct drm_gem_object *obj)
 {
 	struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
 
-	if (!mgag200_bo)
-		return;
 	mgag200_bo_unref(&mgag200_bo);
 }
 
 
 static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
 {
-	return bo->bo.addr_space_offset;
+	return drm_vma_node_offset_addr(&bo->bo.vma_node);
 }
 
 int
@@ -340,23 +356,15 @@
 		     uint64_t *offset)
 {
 	struct drm_gem_object *obj;
-	int ret;
 	struct mgag200_bo *bo;
 
-	mutex_lock(&dev->struct_mutex);
 	obj = drm_gem_object_lookup(dev, file, handle);
-	if (obj == NULL) {
-		ret = -ENOENT;
-		goto out_unlock;
-	}
+	if (obj == NULL)
+		return -ENOENT;
 
 	bo = gem_to_mga_bo(obj);
 	*offset = mgag200_bo_mmap_offset(bo);
 
-	drm_gem_object_unreference(obj);
-	ret = 0;
-out_unlock:
-	mutex_unlock(&dev->struct_mutex);
-	return ret;
-
+	drm_gem_object_unreference_unlocked(obj);
+	return 0;
 }