[PATCH/RFC] v4l: vsp1: Align crop rectangle to even boundary for YUV formats

[Yoshihiro Kaneko <ykaneko0929@gmail.com>]

From: Damian Hobson-Garcia <dhobsong@igel.co.jp>

Make sure that there are valid values in the crop rectangle to ensure
that the color plane doesn't get shifted when cropping.
Since there is no distintion between 12bit and 16bit YUV formats in
at the subdev level, use the more restrictive 12bit limits for all YUV
formats.

Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
---

This patch is based on the master branch of linuxtv.org/media_tree.git.

 drivers/media/platform/vsp1/vsp1_rwpf.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/vsp1/vsp1_rwpf.c b/drivers/media/platform/vsp1/vsp1_rwpf.c
index fa71f46..9fed0b2 100644
--- a/drivers/media/platform/vsp1/vsp1_rwpf.c
+++ b/drivers/media/platform/vsp1/vsp1_rwpf.c
@@ -197,11 +197,21 @@ int vsp1_rwpf_set_selection(struct v4l2_subdev *subdev,
 	 */
 	format = vsp1_entity_get_pad_format(&rwpf->entity, cfg, RWPF_PAD_SINK,
 					    sel->which);
+
+	if (format->code = MEDIA_BUS_FMT_AYUV8_1X32) {
+		sel->r.left = (sel->r.left + 1) & ~1;
+		sel->r.top = (sel->r.top + 1) & ~1;
+		sel->r.width = (sel->r.width) & ~1;
+		sel->r.height = (sel->r.height) & ~1;
+	}
+
 	sel->r.left = min_t(unsigned int, sel->r.left, format->width - 2);
 	sel->r.top = min_t(unsigned int, sel->r.top, format->height - 2);
 	if (rwpf->entity.type = VSP1_ENTITY_WPF) {
-		sel->r.left = min_t(unsigned int, sel->r.left, 255);
-		sel->r.top = min_t(unsigned int, sel->r.top, 255);
+		int maxcrop +			format->code = MEDIA_BUS_FMT_AYUV8_1X32 ? 254 : 255;
+		sel->r.left = min_t(unsigned int, sel->r.left, maxcrop);
+		sel->r.top = min_t(unsigned int, sel->r.top, maxcrop);
 	}
 	sel->r.width = min_t(unsigned int, sel->r.width,
 			     format->width - sel->r.left);
-- 
1.9.1