IGT (Intel GPU Tool) could commit the following planes
during the test:

kms_plane:

The sub-tests pixel-format-* will create planes with
size of 1 or 4512 pixels, these size will be rejected
by the original mode configs.
Adjust minimum and maximum value of both plane width
and height.

kms_cursor_crc:

If cursor_width and cursor_height is not defined,
IGT uses min_width and min_height as the limitation
when creating cursor plane so sub-tests like
cursor-rapid-movement will be skipped.
Set cursor_width and cursor_height to 512 pixel can
solve the problem.

Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index fd653d892b9d..50bcfbd04af1 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -425,16 +425,18 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 	if (ret)
 		goto put_mutex_dev;
 
-	drm->mode_config.min_width = 64;
-	drm->mode_config.min_height = 64;
+	drm->mode_config.min_width = 1;
+	drm->mode_config.min_height = 1;
 
 	/*
 	 * set max width and height as default value(4096x4096).
 	 * this value would be used to check framebuffer size limitation
 	 * at drm_mode_addfb().
 	 */
-	drm->mode_config.max_width = 4096;
-	drm->mode_config.max_height = 4096;
+	drm->mode_config.max_width = 8191;
+	drm->mode_config.max_height = 8191;
+	drm->mode_config.cursor_width = 512;
+	drm->mode_config.cursor_height = 512;
 	drm->mode_config.funcs = &mtk_drm_mode_config_funcs;
 	drm->mode_config.helper_private = &mtk_drm_mode_config_helpers;
 
-- 
2.18.0