From: Mark Yao <mark.yao@rock-chips.com>
Date: Mon, 6 Jun 2016 07:27:33 +0000 (+0800)
Subject: drm/rockchip: vop: correct the source size of uv scale factor setting
X-Git-Tag: firefly_0821_release~2250
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7af0c9a9cac604bf111d3f38578e2eb5e9148573;p=firefly-linux-kernel-4.4.55.git

drm/rockchip: vop: correct the source size of uv scale factor setting

When the input color format is YUV, we need to do some external scale
for CBCR. Like,
 * In YUV420 data format:
     cbcr_xscale = dst_w / src_w * 2;
     cbcr_yscale = dst_h / src_h * 2;
 * In YUV422 data format:
     cbcr_xscale = dst_w / src_w * 2;
     cbcr_yscale = dst_h / src_h;
 * In YUV444 data format
     cbcr_xscale = dst_w / src_w;
     cbcr_yscale = dst_h / src_h;

Change-Id: I08678fdcc13a5c4055fcc46f20b378ad7fa16761
Signed-off-by: Yakir Yang <ykk@rock-chips.com>
(am from https://patchwork.kernel.org/patch/9157353/)
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