drm/rockchip: vop: fix NV12 video display error

Mark Yao · colahuang41 · commit 17204ecfaecd · 2017-05-08T12:03:13.000+08:00
fixup the scale calculation formula on the case
src_height == (dst_height/2).

Change-Id: I620a4646232c016ff1547b5b6469ed2eedeacfed
Signed-off-by: Mark Yao &lt;mark.yao@rock-chips.com&gt;
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
@@ -414,6 +414,9 @@ 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);
 }
 

Original file line number	Diff line number	Diff line change
`@@ -414,6 +414,9 @@ static inline uint16_t scl_get_bili_dn_vskip(int src_h, int dst_h,`
`414`	`414`
`415`	`415`	`act_height = (src_h + vskiplines - 1) / vskiplines;`
`416`	`416`
	`417`	`+ if (act_height == dst_h)`
	`418`	`+ return GET_SCL_FT_BILI_DN(src_h, dst_h) / vskiplines;`
	`419`	`+`
`417`	`420`	`return GET_SCL_FT_BILI_DN(act_height, dst_h);`
`418`	`421`	`}`
`419`	`422`