drm/rockchip: vop: fix NV12 video display error

fixup the scale calculation formula on the case
src_height == (dst_height/2).

Change-Id: I620a4646232c016ff1547b5b6469ed2eedeacfed
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
index 7e45492ba1a3e783d96bd393ef50dc9fd919844e..3519520c4a7ab622c9761b493d050ac389f796a8 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
@@ -446,6 +446,9 @@ static inline uint16_t scl_get_bili_dn_vskip(int src_h, int dst_h,
 
        act_height = (src_h + vskiplines - 1) / vskiplines;
 
+       if (act_height == dst_h)
+               return GET_SCL_FT_BILI_DN(src_h, dst_h) / vskiplines;
+
        return GET_SCL_FT_BILI_DN(act_height, dst_h);
 }