drm/mediatek: set vblank_disable_allowed to true

MTK DRM driver didn't set the vblank_disable_allowed to
true, it cause that the irq_handler is called every
16.6 ms (every vblank) when the display didn't be updated.

Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
Acked-by: CK Hu <ck.hu@mediatek.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index cf83f6507ec8..0b2ae47eb52c 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -217,6 +217,7 @@ static int mtk_drm_kms_init(struct drm_device *drm)
         if (ret < 0)
                 goto err_component_unbind;
 
+        drm->vblank_disable_allowed = true;
         drm_kms_helper_poll_init(drm);
         drm_mode_config_reset(drm);