From b27064b785736eccfdbd28fa54ec1e37754656fe Mon Sep 17 00:00:00 2001
From: Tian Tao <tiantao6@hisilicon.com>
Date: Sat, 11 Jan 2020 11:09:06 +0800
Subject: drm/hisilicon: Enable the shadowfb for hibmc
Git-commit: 31d6feebec8e502d3a8e58beeef96e90d836e70b
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

set the prefer_shadow as 1,so we use the shadowfb to acceleration.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Gong junjie <gongjunjie2@huawei.com>
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1578712146-16327-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
index 4a8a4cfb4b75..5f612f6ac223 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
@@ -95,7 +95,7 @@ static int hibmc_kms_init(struct hibmc_drm_private *priv)
 
 	priv->dev->mode_config.fb_base = priv->fb_base;
 	priv->dev->mode_config.preferred_depth = 24;
-	priv->dev->mode_config.prefer_shadow = 0;
+	priv->dev->mode_config.prefer_shadow = 1;
 
 	priv->dev->mode_config.funcs = (void *)&hibmc_mode_funcs;
 
-- 
2.28.0