diff options
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_cursor.c')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_cursor.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_cursor.c b/drivers/gpu/drm/mgag200/mgag200_cursor.c index ed69b396ac02..318e434f2d40 100644 --- a/drivers/gpu/drm/mgag200/mgag200_cursor.c +++ b/drivers/gpu/drm/mgag200/mgag200_cursor.c @@ -215,17 +215,20 @@ static void mgag200_move_cursor(struct mga_device *mdev, int x, int y) int mgag200_cursor_init(struct mga_device *mdev) { struct drm_device *dev = mdev->dev; + size_t size; + + size = roundup(64 * 48, PAGE_SIZE); + if (size * 2 > mdev->vram_fb_available) + return -ENOMEM; /* * Make small buffers to store a hardware cursor (double * buffered icon updates) */ mdev->cursor.pixels_1 = drm_gem_vram_create(dev, &dev->vram_mm->bdev, - roundup(48*64, PAGE_SIZE), - 0, 0); + size, 0, 0); mdev->cursor.pixels_2 = drm_gem_vram_create(dev, &dev->vram_mm->bdev, - roundup(48*64, PAGE_SIZE), - 0, 0); + size, 0, 0); if (IS_ERR(mdev->cursor.pixels_2) || IS_ERR(mdev->cursor.pixels_1)) { mdev->cursor.pixels_1 = NULL; mdev->cursor.pixels_2 = NULL; @@ -234,6 +237,14 @@ int mgag200_cursor_init(struct mga_device *mdev) } mdev->cursor.pixels_current = NULL; + /* + * At the high end of video memory, we reserve space for + * buffer objects. The cursor plane uses this memory to store + * a double-buffered image of the current cursor. Hence, it's + * not available for framebuffers. + */ + mdev->vram_fb_available -= 2 * size; + return 0; } |