[PATCH] drm/hisilicon: Fix ADE vblank on/off handling

[Xinliang Liu]

Vblank turn on should be called in crtc's enable callback.
And turn off called in crtc's disable callback.

Thanks to Daniel Vetter, this bug is reported by him.

Reported-by: Daniel Vetter <daniel.vetter at intel.com>
Signed-off-by: Xinliang Liu <xinliang.liu at linaro.org>
---
 drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c 
b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
index ed76baad525f..805f4326fafe 100644
--- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
+++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
@@ -487,6 +487,7 @@ static void ade_crtc_enable(struct drm_crtc *crtc)
        ade_set_medianoc_qos(acrtc);
        ade_display_enable(acrtc);
        ade_dump_regs(ctx->base);
+       drm_crtc_vblank_on(crtc);
        acrtc->enable = true;
 }

@@ -498,6 +499,7 @@ static void ade_crtc_disable(struct drm_crtc *crtc)
        if (!acrtc->enable)
                return;

+       drm_crtc_vblank_off(crtc);
        ade_power_down(ctx);
        acrtc->enable = false;
 }
-- 
2.8.3