Subject: Re: [PATCH 3/6] drm/rockchip: vop: fix NV12 video display error
To: Mark Yao <mark.yao@rock-chips.com>, David Airlie <airlied@linux.ie>,
        Heiko Stuebner <heiko@sntech.de>
Cc: linux-rockchip@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, dri-devel@lists.freedesktop.org,
        linux-kernel@vger.kernel.org
References: <1501494569-6825-1-git-send-email-mark.yao@rock-chips.com>
 <1501494586-6984-1-git-send-email-mark.yao@rock-chips.com>
From: Sandy Huang <sandy.huang@rock-chips.com>
Message-ID: <6ebc2b5f-5962-9d23-894d-873c51c79388@rock-chips.com>
Date: Fri, 4 Aug 2017 08:56:21 +0800
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101
 Thunderbird/52.2.1
MIME-Version: 1.0
In-Reply-To: <1501494586-6984-1-git-send-email-mark.yao@rock-chips.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 895
Lines: 28

Hi mark,

在 2017/7/31 17:49, Mark Yao 写道:
> fixup the scale calculation formula on the case
> src_height == (dst_height/2).
> 
> Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
> ---
>   drivers/gpu/drm/rockchip/rockchip_drm_vop.h | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
> index af1091f..56bbd2e 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
> @@ -299,6 +299,9 @@ 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);
>   }
>   
> 

Reviewed-by: Sandy huang <sandy.huang@rock-chips.com>