drm/rockchip: vop: restore vop registers when resume

The registers will be reset to default values when whole
power domain off, so restore registers from regsbak.

Signed-off-by: Mark Yao <mark.yao@rock-chips.com>

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 4a2923b0ee31a9307107a97fc5246d473f05f131..16b7d98362b06da635aaadcec8caa79136aa36c9 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -496,6 +496,7 @@ static void vop_enable(struct drm_crtc *crtc)
                goto err_disable_aclk;
        }
 
+       memcpy(vop->regs, vop->regsbak, vop->len);
        /*
         * At here, vop clock & iommu is enable, R/W vop regs would be safe.
         */